./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.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_72-funloop_hard_racing.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_72-funloop_hard_racing.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_72-funloop_hard_racing.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 14:54:26,893 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:54:27,001 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:54:27,006 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:54:27,006 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:54:27,040 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:54:27,041 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:54:27,042 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:54:27,042 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:54:27,046 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:54:27,046 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:54:27,046 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:54:27,047 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:54:27,048 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:54:27,049 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:54:27,049 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:54:27,049 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:54:27,049 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:54:27,050 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:54:27,050 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:54:27,050 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:54:27,050 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:54:27,051 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:54:27,051 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:54:27,051 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:54:27,051 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:54:27,051 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:54:27,052 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:54:27,052 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:54:27,053 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:54:27,053 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:54:27,054 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:54:27,054 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:54:27,054 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:54:27,054 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:54:27,054 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:54:27,055 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:54:27,055 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:54:27,055 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:54:27,055 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:54:27,055 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:54:27,056 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:54:27,056 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:54:27,056 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:54:27,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:54:27,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:54:27,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:54:27,314 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:54:27,315 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:54:27,316 INFO L431 ainManager$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_72-funloop_hard_racing.yml/witness.yml [2024-02-07 14:54:27,388 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:54:27,388 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:54:27,389 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2024-02-07 14:54:28,592 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:54:28,810 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:54:28,810 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2024-02-07 14:54:28,826 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d598dabf2/bab07eaf06134fbb8bd59b1c4bc8cb43/FLAG6dbfaf0bc [2024-02-07 14:54:28,840 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d598dabf2/bab07eaf06134fbb8bd59b1c4bc8cb43 [2024-02-07 14:54:28,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:54:28,842 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:54:28,842 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:54:28,843 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:54:28,846 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:54:28,847 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:54:27" (1/2) ... [2024-02-07 14:54:28,848 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dadf82e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:54:28, skipping insertion in model container [2024-02-07 14:54:28,848 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:54:27" (1/2) ... [2024-02-07 14:54:28,850 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2544e9f6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:54:28, skipping insertion in model container [2024-02-07 14:54:28,850 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:54:28" (2/2) ... [2024-02-07 14:54:28,850 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dadf82e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:54:28, skipping insertion in model container [2024-02-07 14:54:28,851 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:54:28" (2/2) ... [2024-02-07 14:54:28,851 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:54:28,888 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:54:28,889 INFO L76 edCorrectnessWitness]: Location invariant after [L941-L941] ((((((((((((((((((entry == & cache[0] || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9]) || entry == & cache[0]) || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9] [2024-02-07 14:54:28,889 INFO L76 edCorrectnessWitness]: Location invariant before [L953-L953] (((((((((((((((((((((((((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 14:54:28,889 INFO L76 edCorrectnessWitness]: Location invariant after [L958-L958] (((((((((((((((((((((((((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 14:54:28,890 INFO L76 edCorrectnessWitness]: Location invariant after [L953-L953] (((((((((((((((((((((((((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 14:54:28,890 INFO L76 edCorrectnessWitness]: Location invariant before [L946-L946] ((((((((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 14:54:28,890 INFO L76 edCorrectnessWitness]: Location invariant before [L954-L954] ((((((((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 14:54:28,890 INFO L76 edCorrectnessWitness]: Location invariant before [L958-L958] (((((((((((((((((((((((((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 14:54:28,890 INFO L76 edCorrectnessWitness]: Location invariant before [L941-L941] ((((((((((((((((((entry == & cache[0] || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9]) || entry == & cache[0]) || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9] [2024-02-07 14:54:28,890 INFO L76 edCorrectnessWitness]: Location invariant after [L954-L954] ((((((((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 14:54:28,890 INFO L76 edCorrectnessWitness]: Location invariant before [L941-L941] ((((((((((((((((((entry == & cache[0] || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9]) || entry == & cache[0]) || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9] [2024-02-07 14:54:28,891 INFO L76 edCorrectnessWitness]: Location invariant before [L941-L941] ((((((((((((((((((entry == & cache[0] || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9]) || entry == & cache[0]) || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9] [2024-02-07 14:54:28,891 INFO L76 edCorrectnessWitness]: Location invariant after [L941-L941] ((((((((((((((((((entry == & cache[0] || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9]) || entry == & cache[0]) || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9] [2024-02-07 14:54:28,891 INFO L76 edCorrectnessWitness]: Location invariant after [L941-L941] ((((((((((((((((((entry == & cache[0] || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9]) || entry == & cache[0]) || entry == & cache[1]) || entry == & cache[2]) || entry == & cache[3]) || entry == & cache[4]) || entry == & cache[5]) || entry == & cache[6]) || entry == & cache[7]) || entry == & cache[8]) || entry == & cache[9] [2024-02-07 14:54:28,891 INFO L76 edCorrectnessWitness]: Location invariant before [L951-L951] ((((((((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 14:54:28,891 INFO L76 edCorrectnessWitness]: Location invariant after [L946-L946] ((((((((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 14:54:28,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:54:29,313 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_72-funloop_hard_racing.i[41323,41336] [2024-02-07 14:54:29,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:54:29,387 INFO L203 MainTranslator]: Completed pre-run [2024-02-07 14:54:29,433 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_72-funloop_hard_racing.i[41323,41336] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 14:54:29,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:54:29,661 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:54:29,662 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:54:29 WrapperNode [2024-02-07 14:54:29,662 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:54:29,664 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:54:29,664 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:54:29,664 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:54:29,669 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:54:29" (1/1) ... [2024-02-07 14:54:29,708 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:54:29" (1/1) ... [2024-02-07 14:54:29,744 INFO L138 Inliner]: procedures = 272, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 296 [2024-02-07 14:54:29,746 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:54:29,746 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:54:29,747 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:54:29,747 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:54:29,755 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:54:29" (1/1) ... [2024-02-07 14:54:29,756 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:54:29" (1/1) ... [2024-02-07 14:54:29,770 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:54:29" (1/1) ... [2024-02-07 14:54:29,799 INFO L175 MemorySlicer]: Split 25 memory accesses to 4 slices as follows [2, 5, 16, 2]. 64 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0]. The 8 writes are split as follows [0, 0, 7, 1]. [2024-02-07 14:54:29,804 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:54:29" (1/1) ... [2024-02-07 14:54:29,805 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:54:29" (1/1) ... [2024-02-07 14:54:29,815 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:54:29" (1/1) ... [2024-02-07 14:54:29,834 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:54:29" (1/1) ... [2024-02-07 14:54:29,839 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:54:29" (1/1) ... [2024-02-07 14:54:29,841 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:54:29" (1/1) ... [2024-02-07 14:54:29,848 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:54:29,849 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:54:29,849 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:54:29,849 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:54:29,850 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:54:29" (1/1) ... [2024-02-07 14:54:29,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:54:29,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:54:29,874 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 14:54:29,894 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 14:54:29,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:54:29,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:54:29,908 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-07 14:54:29,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:54:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:54:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:54:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 14:54:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:54:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:54:29,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:54:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 14:54:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-07 14:54:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:54:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-02-07 14:54:29,910 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-02-07 14:54:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:54:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:54:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:54:29,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 14:54:29,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:54:29,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:54:29,912 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 14:54:30,025 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:54:30,027 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:54:30,493 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:54:30,494 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:54:30,635 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:54:30,635 INFO L320 CfgBuilder]: Removed 35 assume(true) statements. [2024-02-07 14:54:30,636 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:54:30 BoogieIcfgContainer [2024-02-07 14:54:30,636 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:54:30,639 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:54:30,639 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:54:30,643 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:54:30,643 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:54:27" (1/4) ... [2024-02-07 14:54:30,644 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4911c2b3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:54:30, skipping insertion in model container [2024-02-07 14:54:30,644 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:54:28" (2/4) ... [2024-02-07 14:54:30,645 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4911c2b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:54:30, skipping insertion in model container [2024-02-07 14:54:30,645 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:54:29" (3/4) ... [2024-02-07 14:54:30,646 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4911c2b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:54:30, skipping insertion in model container [2024-02-07 14:54:30,646 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:54:30" (4/4) ... [2024-02-07 14:54:30,648 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_72-funloop_hard_racing.i [2024-02-07 14:54:30,666 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:54:30,667 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-02-07 14:54:30,667 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:54:30,745 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-02-07 14:54:30,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 153 transitions, 313 flow [2024-02-07 14:54:30,878 INFO L124 PetriNetUnfolderBase]: 65/244 cut-off events. [2024-02-07 14:54:30,878 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 14:54:30,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 244 events. 65/244 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1181 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 142. Up to 8 conditions per place. [2024-02-07 14:54:30,885 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 153 transitions, 313 flow [2024-02-07 14:54:30,891 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 152 transitions, 311 flow [2024-02-07 14:54:30,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:54:30,910 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;@8928b78, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:54:30,910 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2024-02-07 14:54:30,913 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:54:30,914 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-02-07 14:54:30,914 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:54:30,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:54:30,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-07 14:54:30,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 17 more)] === [2024-02-07 14:54:30,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:54:30,922 INFO L85 PathProgramCache]: Analyzing trace with hash 753722, now seen corresponding path program 1 times [2024-02-07 14:54:30,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:54:30,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217801690] [2024-02-07 14:54:30,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:30,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:54:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:31,147 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 14:54:31,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:54:31,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217801690] [2024-02-07 14:54:31,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217801690] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:54:31,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:54:31,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:54:31,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553476441] [2024-02-07 14:54:31,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:54:31,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:54:31,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:54:31,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:54:31,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:54:31,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 153 [2024-02-07 14:54:31,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 152 transitions, 311 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 14:54:31,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:54:31,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 153 [2024-02-07 14:54:31,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:54:31,531 INFO L124 PetriNetUnfolderBase]: 906/2609 cut-off events. [2024-02-07 14:54:31,532 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 14:54:31,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4324 conditions, 2609 events. 906/2609 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 20356 event pairs, 760 based on Foata normal form. 568/2908 useless extension candidates. Maximal degree in co-relation 4187. Up to 1709 conditions per place. [2024-02-07 14:54:31,544 INFO L140 encePairwiseOnDemand]: 116/153 looper letters, 67 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2024-02-07 14:54:31,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 120 transitions, 385 flow [2024-02-07 14:54:31,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:54:31,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:54:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2024-02-07 14:54:31,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5599128540305011 [2024-02-07 14:54:31,555 INFO L175 Difference]: Start difference. First operand has 116 places, 152 transitions, 311 flow. Second operand 3 states and 257 transitions. [2024-02-07 14:54:31,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 120 transitions, 385 flow [2024-02-07 14:54:31,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 120 transitions, 385 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:54:31,561 INFO L231 Difference]: Finished difference. Result has 119 places, 120 transitions, 259 flow [2024-02-07 14:54:31,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=119, PETRI_TRANSITIONS=120} [2024-02-07 14:54:31,566 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 3 predicate places. [2024-02-07 14:54:31,566 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 120 transitions, 259 flow [2024-02-07 14:54:31,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 14:54:31,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:54:31,567 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-02-07 14:54:31,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:54:31,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 17 more)] === [2024-02-07 14:54:31,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:54:31,569 INFO L85 PathProgramCache]: Analyzing trace with hash 724354048, now seen corresponding path program 1 times [2024-02-07 14:54:31,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:54:31,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414808228] [2024-02-07 14:54:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:31,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:54:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:31,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:54:31,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414808228] [2024-02-07 14:54:31,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414808228] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:54:31,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763581371] [2024-02-07 14:54:31,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:31,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:54:31,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:54:31,780 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 14:54:31,840 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 14:54:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:31,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 14:54:31,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:54:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:31,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:54:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:31,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763581371] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:54:31,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:54:31,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 4 [2024-02-07 14:54:31,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353104607] [2024-02-07 14:54:31,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:54:31,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:54:31,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:54:31,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:54:31,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-02-07 14:54:31,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 153 [2024-02-07 14:54:31,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 120 transitions, 259 flow. Second operand has 6 states, 6 states have (on average 51.333333333333336) internal successors, (308), 6 states have internal predecessors, (308), 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 14:54:31,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:54:31,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 153 [2024-02-07 14:54:31,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:54:32,317 INFO L124 PetriNetUnfolderBase]: 906/2611 cut-off events. [2024-02-07 14:54:32,317 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 14:54:32,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4338 conditions, 2611 events. 906/2611 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 20357 event pairs, 760 based on Foata normal form. 2/2345 useless extension candidates. Maximal degree in co-relation 4324. Up to 1706 conditions per place. [2024-02-07 14:54:32,328 INFO L140 encePairwiseOnDemand]: 148/153 looper letters, 67 selfloop transitions, 6 changer transitions 0/123 dead transitions. [2024-02-07 14:54:32,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 123 transitions, 411 flow [2024-02-07 14:54:32,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:54:32,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:54:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 377 transitions. [2024-02-07 14:54:32,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106753812636166 [2024-02-07 14:54:32,331 INFO L175 Difference]: Start difference. First operand has 119 places, 120 transitions, 259 flow. Second operand 6 states and 377 transitions. [2024-02-07 14:54:32,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 123 transitions, 411 flow [2024-02-07 14:54:32,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 123 transitions, 409 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:54:32,334 INFO L231 Difference]: Finished difference. Result has 123 places, 121 transitions, 276 flow [2024-02-07 14:54:32,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=276, PETRI_PLACES=123, PETRI_TRANSITIONS=121} [2024-02-07 14:54:32,334 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 7 predicate places. [2024-02-07 14:54:32,334 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 121 transitions, 276 flow [2024-02-07 14:54:32,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 51.333333333333336) internal successors, (308), 6 states have internal predecessors, (308), 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 14:54:32,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:54:32,335 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2024-02-07 14:54:32,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-07 14:54:32,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:54:32,548 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 17 more)] === [2024-02-07 14:54:32,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:54:32,548 INFO L85 PathProgramCache]: Analyzing trace with hash 457894796, now seen corresponding path program 1 times [2024-02-07 14:54:32,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:54:32,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174426442] [2024-02-07 14:54:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:32,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:54:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:32,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:54:32,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174426442] [2024-02-07 14:54:32,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174426442] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:54:32,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719477072] [2024-02-07 14:54:32,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:32,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:54:32,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:54:32,668 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 14:54:32,695 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 14:54:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:32,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 14:54:32,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:54:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:32,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:54:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:32,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719477072] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:54:32,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:54:32,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-02-07 14:54:32,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807086076] [2024-02-07 14:54:32,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:54:32,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 14:54:32,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:54:32,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 14:54:32,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-02-07 14:54:32,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 153 [2024-02-07 14:54:32,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 121 transitions, 276 flow. Second operand has 11 states, 11 states have (on average 52.0) internal successors, (572), 11 states have internal predecessors, (572), 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 14:54:32,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:54:32,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 153 [2024-02-07 14:54:32,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:54:33,170 INFO L124 PetriNetUnfolderBase]: 906/2621 cut-off events. [2024-02-07 14:54:33,170 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-07 14:54:33,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4389 conditions, 2621 events. 906/2621 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 20336 event pairs, 760 based on Foata normal form. 5/2358 useless extension candidates. Maximal degree in co-relation 4309. Up to 1707 conditions per place. [2024-02-07 14:54:33,182 INFO L140 encePairwiseOnDemand]: 149/153 looper letters, 73 selfloop transitions, 10 changer transitions 0/133 dead transitions. [2024-02-07 14:54:33,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 133 transitions, 510 flow [2024-02-07 14:54:33,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:54:33,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:54:33,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 588 transitions. [2024-02-07 14:54:33,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843137254901961 [2024-02-07 14:54:33,185 INFO L175 Difference]: Start difference. First operand has 123 places, 121 transitions, 276 flow. Second operand 10 states and 588 transitions. [2024-02-07 14:54:33,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 133 transitions, 510 flow [2024-02-07 14:54:33,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 133 transitions, 488 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-02-07 14:54:33,191 INFO L231 Difference]: Finished difference. Result has 135 places, 127 transitions, 340 flow [2024-02-07 14:54:33,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=340, PETRI_PLACES=135, PETRI_TRANSITIONS=127} [2024-02-07 14:54:33,192 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, 19 predicate places. [2024-02-07 14:54:33,192 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 127 transitions, 340 flow [2024-02-07 14:54:33,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 52.0) internal successors, (572), 11 states have internal predecessors, (572), 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 14:54:33,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:54:33,193 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2024-02-07 14:54:33,208 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 14:54:33,405 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,SelfDestructingSolverStorable2 [2024-02-07 14:54:33,405 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 17 more)] === [2024-02-07 14:54:33,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:54:33,406 INFO L85 PathProgramCache]: Analyzing trace with hash 2064699758, now seen corresponding path program 2 times [2024-02-07 14:54:33,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:54:33,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162687107] [2024-02-07 14:54:33,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:33,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:54:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:33,624 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:33,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:54:33,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162687107] [2024-02-07 14:54:33,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162687107] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:54:33,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290060646] [2024-02-07 14:54:33,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:54:33,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:54:33,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:54:33,625 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 14:54:33,655 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 14:54:33,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-02-07 14:54:33,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:54:33,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 32 conjunts are in the unsatisfiable core [2024-02-07 14:54:33,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:54:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-02-07 14:54:33,727 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:54:33,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290060646] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:54:33,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:54:33,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 13 [2024-02-07 14:54:33,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384413742] [2024-02-07 14:54:33,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:54:33,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:54:33,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:54:33,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:54:33,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:54:33,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 153 [2024-02-07 14:54:33,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 127 transitions, 340 flow. Second operand has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 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 14:54:33,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:54:33,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 153 [2024-02-07 14:54:33,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:54:33,808 INFO L124 PetriNetUnfolderBase]: 63/198 cut-off events. [2024-02-07 14:54:33,808 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-02-07 14:54:33,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 198 events. 63/198 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 711 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 331. Up to 120 conditions per place. [2024-02-07 14:54:33,809 INFO L140 encePairwiseOnDemand]: 149/153 looper letters, 53 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2024-02-07 14:54:33,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 76 transitions, 345 flow [2024-02-07 14:54:33,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:54:33,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:54:33,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 255 transitions. [2024-02-07 14:54:33,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-02-07 14:54:33,810 INFO L175 Difference]: Start difference. First operand has 135 places, 127 transitions, 340 flow. Second operand 4 states and 255 transitions. [2024-02-07 14:54:33,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 76 transitions, 345 flow [2024-02-07 14:54:33,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 76 transitions, 341 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:54:33,817 INFO L231 Difference]: Finished difference. Result has 67 places, 55 transitions, 193 flow [2024-02-07 14:54:33,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=67, PETRI_TRANSITIONS=55} [2024-02-07 14:54:33,818 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -49 predicate places. [2024-02-07 14:54:33,818 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 55 transitions, 193 flow [2024-02-07 14:54:33,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 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 14:54:33,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:54:33,819 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1] [2024-02-07 14:54:33,846 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 14:54:34,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:54:34,031 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 17 more)] === [2024-02-07 14:54:34,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:54:34,032 INFO L85 PathProgramCache]: Analyzing trace with hash -98397925, now seen corresponding path program 1 times [2024-02-07 14:54:34,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:54:34,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328993539] [2024-02-07 14:54:34,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:34,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:54:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:54:34,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:54:34,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328993539] [2024-02-07 14:54:34,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328993539] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:54:34,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368575550] [2024-02-07 14:54:34,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:34,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:54:34,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:54:34,215 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 14:54:34,241 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 14:54:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:34,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:54:34,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:54:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:54:34,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:54:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-07 14:54:34,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368575550] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:54:34,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:54:34,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2024-02-07 14:54:34,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12602371] [2024-02-07 14:54:34,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:54:34,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:54:34,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:54:34,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:54:34,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:54:34,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 153 [2024-02-07 14:54:34,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 55 transitions, 193 flow. Second operand has 13 states, 13 states have (on average 52.23076923076923) internal successors, (679), 13 states have internal predecessors, (679), 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 14:54:34,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:54:34,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 153 [2024-02-07 14:54:34,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:54:34,485 INFO L124 PetriNetUnfolderBase]: 66/235 cut-off events. [2024-02-07 14:54:34,485 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-02-07 14:54:34,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 235 events. 66/235 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 816 event pairs, 57 based on Foata normal form. 2/225 useless extension candidates. Maximal degree in co-relation 385. Up to 145 conditions per place. [2024-02-07 14:54:34,486 INFO L140 encePairwiseOnDemand]: 149/153 looper letters, 35 selfloop transitions, 12 changer transitions 0/65 dead transitions. [2024-02-07 14:54:34,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 65 transitions, 359 flow [2024-02-07 14:54:34,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 14:54:34,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 14:54:34,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 649 transitions. [2024-02-07 14:54:34,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35348583877995643 [2024-02-07 14:54:34,488 INFO L175 Difference]: Start difference. First operand has 67 places, 55 transitions, 193 flow. Second operand 12 states and 649 transitions. [2024-02-07 14:54:34,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 65 transitions, 359 flow [2024-02-07 14:54:34,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 65 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:54:34,491 INFO L231 Difference]: Finished difference. Result has 79 places, 58 transitions, 255 flow [2024-02-07 14:54:34,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=153, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=255, PETRI_PLACES=79, PETRI_TRANSITIONS=58} [2024-02-07 14:54:34,493 INFO L281 CegarLoopForPetriNet]: 116 programPoint places, -37 predicate places. [2024-02-07 14:54:34,493 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 58 transitions, 255 flow [2024-02-07 14:54:34,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 52.23076923076923) internal successors, (679), 13 states have internal predecessors, (679), 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 14:54:34,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:54:34,494 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1] [2024-02-07 14:54:34,517 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 14:54:34,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:54:34,705 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 17 more)] === [2024-02-07 14:54:34,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:54:34,706 INFO L85 PathProgramCache]: Analyzing trace with hash -96509297, now seen corresponding path program 2 times [2024-02-07 14:54:34,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:54:34,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912544321] [2024-02-07 14:54:34,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:34,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:54:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:54:34,741 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 14:54:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:54:34,778 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 14:54:34,778 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 14:54:34,778 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (19 of 20 remaining) [2024-02-07 14:54:34,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 20 remaining) [2024-02-07 14:54:34,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 20 remaining) [2024-02-07 14:54:34,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 20 remaining) [2024-02-07 14:54:34,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 20 remaining) [2024-02-07 14:54:34,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 20 remaining) [2024-02-07 14:54:34,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 20 remaining) [2024-02-07 14:54:34,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (12 of 20 remaining) [2024-02-07 14:54:34,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION (11 of 20 remaining) [2024-02-07 14:54:34,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 20 remaining) [2024-02-07 14:54:34,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 20 remaining) [2024-02-07 14:54:34,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 20 remaining) [2024-02-07 14:54:34,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 20 remaining) [2024-02-07 14:54:34,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 20 remaining) [2024-02-07 14:54:34,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONERROR_FUNCTION (5 of 20 remaining) [2024-02-07 14:54:34,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 20 remaining) [2024-02-07 14:54:34,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 20 remaining) [2024-02-07 14:54:34,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 20 remaining) [2024-02-07 14:54:34,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 20 remaining) [2024-02-07 14:54:34,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 20 remaining) [2024-02-07 14:54:34,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 14:54:34,782 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2024-02-07 14:54:34,784 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 14:54:34,784 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-07 14:54:34,821 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 14:54:34,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 203 transitions, 422 flow [2024-02-07 14:54:34,846 INFO L124 PetriNetUnfolderBase]: 105/398 cut-off events. [2024-02-07 14:54:34,846 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-02-07 14:54:34,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 398 events. 105/398 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2173 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 246. Up to 12 conditions per place. [2024-02-07 14:54:34,849 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 203 transitions, 422 flow [2024-02-07 14:54:34,853 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 203 transitions, 422 flow [2024-02-07 14:54:34,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:54:34,858 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;@8928b78, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:54:34,858 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-02-07 14:54:34,859 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:54:34,859 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-02-07 14:54:34,859 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:54:34,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:54:34,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-07 14:54:34,859 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 22 more)] === [2024-02-07 14:54:34,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:54:34,860 INFO L85 PathProgramCache]: Analyzing trace with hash 955301, now seen corresponding path program 1 times [2024-02-07 14:54:34,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:54:34,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098475100] [2024-02-07 14:54:34,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:34,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:54:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:34,893 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 14:54:34,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:54:34,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098475100] [2024-02-07 14:54:34,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098475100] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:54:34,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:54:34,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:54:34,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731908946] [2024-02-07 14:54:34,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:54:34,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:54:34,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:54:34,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:54:34,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:54:34,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 203 [2024-02-07 14:54:34,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 203 transitions, 422 flow. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 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 14:54:34,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:54:34,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 203 [2024-02-07 14:54:34,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:54:41,196 INFO L124 PetriNetUnfolderBase]: 36330/72777 cut-off events. [2024-02-07 14:54:41,196 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-02-07 14:54:41,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125348 conditions, 72777 events. 36330/72777 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 2112. Compared 771356 event pairs, 31673 based on Foata normal form. 17741/82842 useless extension candidates. Maximal degree in co-relation 91460. Up to 52463 conditions per place. [2024-02-07 14:54:41,682 INFO L140 encePairwiseOnDemand]: 155/203 looper letters, 90 selfloop transitions, 2 changer transitions 0/160 dead transitions. [2024-02-07 14:54:41,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 160 transitions, 520 flow [2024-02-07 14:54:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:54:41,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:54:41,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2024-02-07 14:54:41,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615763546798029 [2024-02-07 14:54:41,701 INFO L175 Difference]: Start difference. First operand has 154 places, 203 transitions, 422 flow. Second operand 3 states and 342 transitions. [2024-02-07 14:54:41,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 160 transitions, 520 flow [2024-02-07 14:54:41,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 160 transitions, 520 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:54:41,708 INFO L231 Difference]: Finished difference. Result has 157 places, 160 transitions, 348 flow [2024-02-07 14:54:41,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=348, PETRI_PLACES=157, PETRI_TRANSITIONS=160} [2024-02-07 14:54:41,712 INFO L281 CegarLoopForPetriNet]: 154 programPoint places, 3 predicate places. [2024-02-07 14:54:41,712 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 160 transitions, 348 flow [2024-02-07 14:54:41,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 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 14:54:41,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:54:41,713 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-02-07 14:54:41,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 14:54:41,714 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 22 more)] === [2024-02-07 14:54:41,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:54:41,714 INFO L85 PathProgramCache]: Analyzing trace with hash 918077963, now seen corresponding path program 1 times [2024-02-07 14:54:41,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:54:41,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355045369] [2024-02-07 14:54:41,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:41,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:54:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:41,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:54:41,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355045369] [2024-02-07 14:54:41,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355045369] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:54:41,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735757587] [2024-02-07 14:54:41,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:41,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:54:41,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:54:41,816 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 14:54:41,817 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 14:54:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:41,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 14:54:41,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:54:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:41,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:54:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:41,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735757587] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:54:41,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:54:41,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 4 [2024-02-07 14:54:41,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070793851] [2024-02-07 14:54:41,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:54:41,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:54:41,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:54:41,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:54:41,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-02-07 14:54:41,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 203 [2024-02-07 14:54:41,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 160 transitions, 348 flow. Second operand has 6 states, 6 states have (on average 68.33333333333333) internal successors, (410), 6 states have internal predecessors, (410), 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 14:54:41,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:54:41,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 203 [2024-02-07 14:54:41,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:54:47,730 INFO L124 PetriNetUnfolderBase]: 36330/72779 cut-off events. [2024-02-07 14:54:47,731 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-02-07 14:54:47,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125362 conditions, 72779 events. 36330/72779 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 2112. Compared 771414 event pairs, 31673 based on Foata normal form. 2/65106 useless extension candidates. Maximal degree in co-relation 125347. Up to 52460 conditions per place. [2024-02-07 14:54:48,123 INFO L140 encePairwiseOnDemand]: 198/203 looper letters, 90 selfloop transitions, 6 changer transitions 0/163 dead transitions. [2024-02-07 14:54:48,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 163 transitions, 546 flow [2024-02-07 14:54:48,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:54:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:54:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 502 transitions. [2024-02-07 14:54:48,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121510673234811 [2024-02-07 14:54:48,127 INFO L175 Difference]: Start difference. First operand has 157 places, 160 transitions, 348 flow. Second operand 6 states and 502 transitions. [2024-02-07 14:54:48,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 163 transitions, 546 flow [2024-02-07 14:54:48,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 163 transitions, 544 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:54:48,131 INFO L231 Difference]: Finished difference. Result has 161 places, 161 transitions, 365 flow [2024-02-07 14:54:48,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=365, PETRI_PLACES=161, PETRI_TRANSITIONS=161} [2024-02-07 14:54:48,132 INFO L281 CegarLoopForPetriNet]: 154 programPoint places, 7 predicate places. [2024-02-07 14:54:48,133 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 161 transitions, 365 flow [2024-02-07 14:54:48,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 68.33333333333333) internal successors, (410), 6 states have internal predecessors, (410), 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 14:54:48,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:54:48,133 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2024-02-07 14:54:48,159 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 14:54:48,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:54:48,347 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 22 more)] === [2024-02-07 14:54:48,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:54:48,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1192726524, now seen corresponding path program 1 times [2024-02-07 14:54:48,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:54:48,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139389490] [2024-02-07 14:54:48,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:48,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:54:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:48,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:54:48,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139389490] [2024-02-07 14:54:48,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139389490] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:54:48,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352226060] [2024-02-07 14:54:48,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:48,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:54:48,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:54:48,425 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 14:54:48,480 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 14:54:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:48,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 14:54:48,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:54:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:48,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:54:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:48,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352226060] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:54:48,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:54:48,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-02-07 14:54:48,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933404498] [2024-02-07 14:54:48,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:54:48,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 14:54:48,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:54:48,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 14:54:48,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-02-07 14:54:48,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 203 [2024-02-07 14:54:48,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 161 transitions, 365 flow. Second operand has 11 states, 11 states have (on average 69.0) internal successors, (759), 11 states have internal predecessors, (759), 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 14:54:48,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:54:48,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 203 [2024-02-07 14:54:48,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:54:54,425 INFO L124 PetriNetUnfolderBase]: 36330/72789 cut-off events. [2024-02-07 14:54:54,425 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2024-02-07 14:54:54,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125413 conditions, 72789 events. 36330/72789 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 2112. Compared 771335 event pairs, 31673 based on Foata normal form. 5/65119 useless extension candidates. Maximal degree in co-relation 125332. Up to 52461 conditions per place. [2024-02-07 14:54:54,947 INFO L140 encePairwiseOnDemand]: 199/203 looper letters, 96 selfloop transitions, 10 changer transitions 0/173 dead transitions. [2024-02-07 14:54:54,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 173 transitions, 645 flow [2024-02-07 14:54:54,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:54:54,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:54:54,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 781 transitions. [2024-02-07 14:54:54,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3847290640394089 [2024-02-07 14:54:54,952 INFO L175 Difference]: Start difference. First operand has 161 places, 161 transitions, 365 flow. Second operand 10 states and 781 transitions. [2024-02-07 14:54:54,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 173 transitions, 645 flow [2024-02-07 14:54:54,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 173 transitions, 623 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-02-07 14:54:54,961 INFO L231 Difference]: Finished difference. Result has 173 places, 167 transitions, 429 flow [2024-02-07 14:54:54,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=429, PETRI_PLACES=173, PETRI_TRANSITIONS=167} [2024-02-07 14:54:54,963 INFO L281 CegarLoopForPetriNet]: 154 programPoint places, 19 predicate places. [2024-02-07 14:54:54,963 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 167 transitions, 429 flow [2024-02-07 14:54:54,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 69.0) internal successors, (759), 11 states have internal predecessors, (759), 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 14:54:54,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:54:54,964 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2024-02-07 14:54:54,981 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 14:54:55,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:54:55,183 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 22 more)] === [2024-02-07 14:54:55,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:54:55,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1181889726, now seen corresponding path program 2 times [2024-02-07 14:54:55,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:54:55,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78390366] [2024-02-07 14:54:55,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:55,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:54:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:55,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:54:55,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78390366] [2024-02-07 14:54:55,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78390366] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:54:55,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577492467] [2024-02-07 14:54:55,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:54:55,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:54:55,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:54:55,339 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 14:54:55,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-07 14:54:55,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-02-07 14:54:55,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:54:55,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 32 conjunts are in the unsatisfiable core [2024-02-07 14:54:55,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:54:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-02-07 14:54:55,442 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:54:55,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577492467] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:54:55,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:54:55,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 13 [2024-02-07 14:54:55,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098916420] [2024-02-07 14:54:55,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:54:55,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:54:55,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:54:55,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:54:55,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:54:55,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 203 [2024-02-07 14:54:55,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 167 transitions, 429 flow. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 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 14:54:55,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:54:55,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 203 [2024-02-07 14:54:55,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:55:00,325 INFO L124 PetriNetUnfolderBase]: 35219/64449 cut-off events. [2024-02-07 14:55:00,326 INFO L125 PetriNetUnfolderBase]: For 523/523 co-relation queries the response was YES. [2024-02-07 14:55:00,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116098 conditions, 64449 events. 35219/64449 cut-off events. For 523/523 co-relation queries the response was YES. Maximal size of possible extension queue 1970. Compared 632161 event pairs, 331 based on Foata normal form. 0/57530 useless extension candidates. Maximal degree in co-relation 116014. Up to 50508 conditions per place. [2024-02-07 14:55:00,721 INFO L140 encePairwiseOnDemand]: 199/203 looper letters, 159 selfloop transitions, 3 changer transitions 0/231 dead transitions. [2024-02-07 14:55:00,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 231 transitions, 881 flow [2024-02-07 14:55:00,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:55:00,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:55:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 430 transitions. [2024-02-07 14:55:00,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295566502463054 [2024-02-07 14:55:00,723 INFO L175 Difference]: Start difference. First operand has 173 places, 167 transitions, 429 flow. Second operand 4 states and 430 transitions. [2024-02-07 14:55:00,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 231 transitions, 881 flow [2024-02-07 14:55:00,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 231 transitions, 877 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:55:00,735 INFO L231 Difference]: Finished difference. Result has 176 places, 168 transitions, 443 flow [2024-02-07 14:55:00,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=443, PETRI_PLACES=176, PETRI_TRANSITIONS=168} [2024-02-07 14:55:00,737 INFO L281 CegarLoopForPetriNet]: 154 programPoint places, 22 predicate places. [2024-02-07 14:55:00,737 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 168 transitions, 443 flow [2024-02-07 14:55:00,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 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 14:55:00,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:55:00,738 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1] [2024-02-07 14:55:00,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-02-07 14:55:00,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:55:00,950 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 22 more)] === [2024-02-07 14:55:00,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:55:00,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1501401557, now seen corresponding path program 1 times [2024-02-07 14:55:00,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:55:00,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388126946] [2024-02-07 14:55:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:55:00,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:55:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:55:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-07 14:55:01,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:55:01,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388126946] [2024-02-07 14:55:01,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388126946] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:55:01,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111532933] [2024-02-07 14:55:01,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:55:01,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:55:01,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:55:01,144 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:55:01,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-07 14:55:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:55:01,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:55:01,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:55:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-07 14:55:01,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:55:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-07 14:55:01,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111532933] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:55:01,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:55:01,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2024-02-07 14:55:01,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029682016] [2024-02-07 14:55:01,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:55:01,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:55:01,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:55:01,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:55:01,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:55:01,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 203 [2024-02-07 14:55:01,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 168 transitions, 443 flow. Second operand has 13 states, 13 states have (on average 69.3076923076923) internal successors, (901), 13 states have internal predecessors, (901), 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 14:55:01,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:55:01,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 203 [2024-02-07 14:55:01,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:55:07,389 INFO L124 PetriNetUnfolderBase]: 35537/69555 cut-off events. [2024-02-07 14:55:07,390 INFO L125 PetriNetUnfolderBase]: For 1796/1796 co-relation queries the response was YES. [2024-02-07 14:55:07,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122385 conditions, 69555 events. 35537/69555 cut-off events. For 1796/1796 co-relation queries the response was YES. Maximal size of possible extension queue 2106. Compared 720586 event pairs, 31028 based on Foata normal form. 2/62546 useless extension candidates. Maximal degree in co-relation 122269. Up to 50981 conditions per place. [2024-02-07 14:55:07,971 INFO L140 encePairwiseOnDemand]: 199/203 looper letters, 99 selfloop transitions, 12 changer transitions 0/178 dead transitions. [2024-02-07 14:55:07,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 178 transitions, 737 flow [2024-02-07 14:55:07,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 14:55:07,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 14:55:07,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 916 transitions. [2024-02-07 14:55:07,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3760262725779967 [2024-02-07 14:55:07,992 INFO L175 Difference]: Start difference. First operand has 176 places, 168 transitions, 443 flow. Second operand 12 states and 916 transitions. [2024-02-07 14:55:07,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 178 transitions, 737 flow [2024-02-07 14:55:07,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 178 transitions, 735 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:55:07,997 INFO L231 Difference]: Finished difference. Result has 189 places, 171 transitions, 506 flow [2024-02-07 14:55:07,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=506, PETRI_PLACES=189, PETRI_TRANSITIONS=171} [2024-02-07 14:55:07,998 INFO L281 CegarLoopForPetriNet]: 154 programPoint places, 35 predicate places. [2024-02-07 14:55:07,998 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 171 transitions, 506 flow [2024-02-07 14:55:07,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 69.3076923076923) internal successors, (901), 13 states have internal predecessors, (901), 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 14:55:07,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:55:07,999 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1] [2024-02-07 14:55:08,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-02-07 14:55:08,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-02-07 14:55:08,211 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 22 more)] === [2024-02-07 14:55:08,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:55:08,212 INFO L85 PathProgramCache]: Analyzing trace with hash -956293793, now seen corresponding path program 2 times [2024-02-07 14:55:08,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:55:08,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670212049] [2024-02-07 14:55:08,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:55:08,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:55:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:55:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-02-07 14:55:08,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:55:08,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670212049] [2024-02-07 14:55:08,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670212049] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:55:08,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520296754] [2024-02-07 14:55:08,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:55:08,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:55:08,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:55:08,357 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:55:08,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-07 14:55:08,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:55:08,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:55:08,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-07 14:55:08,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:55:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-02-07 14:55:08,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:55:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-02-07 14:55:08,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520296754] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:55:08,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:55:08,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-02-07 14:55:08,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715252388] [2024-02-07 14:55:08,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:55:08,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:55:08,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:55:08,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:55:08,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:55:08,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 203 [2024-02-07 14:55:08,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 171 transitions, 506 flow. Second operand has 5 states, 5 states have (on average 70.2) internal successors, (351), 5 states have internal predecessors, (351), 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 14:55:08,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:55:08,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 203 [2024-02-07 14:55:08,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:55:09,066 INFO L124 PetriNetUnfolderBase]: 2986/6174 cut-off events. [2024-02-07 14:55:09,067 INFO L125 PetriNetUnfolderBase]: For 1968/1968 co-relation queries the response was YES. [2024-02-07 14:55:09,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11363 conditions, 6174 events. 2986/6174 cut-off events. For 1968/1968 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 46118 event pairs, 930 based on Foata normal form. 800/6525 useless extension candidates. Maximal degree in co-relation 11238. Up to 3600 conditions per place. [2024-02-07 14:55:09,096 INFO L140 encePairwiseOnDemand]: 199/203 looper letters, 118 selfloop transitions, 3 changer transitions 0/160 dead transitions. [2024-02-07 14:55:09,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 160 transitions, 714 flow [2024-02-07 14:55:09,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:55:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:55:09,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 454 transitions. [2024-02-07 14:55:09,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44729064039408867 [2024-02-07 14:55:09,097 INFO L175 Difference]: Start difference. First operand has 189 places, 171 transitions, 506 flow. Second operand 5 states and 454 transitions. [2024-02-07 14:55:09,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 160 transitions, 714 flow [2024-02-07 14:55:09,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 160 transitions, 696 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-02-07 14:55:09,100 INFO L231 Difference]: Finished difference. Result has 115 places, 97 transitions, 334 flow [2024-02-07 14:55:09,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=334, PETRI_PLACES=115, PETRI_TRANSITIONS=97} [2024-02-07 14:55:09,101 INFO L281 CegarLoopForPetriNet]: 154 programPoint places, -39 predicate places. [2024-02-07 14:55:09,101 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 97 transitions, 334 flow [2024-02-07 14:55:09,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.2) internal successors, (351), 5 states have internal predecessors, (351), 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 14:55:09,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:55:09,101 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 3, 2, 2, 1, 1, 1, 1, 1] [2024-02-07 14:55:09,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-07 14:55:09,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:55:09,314 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 22 more)] === [2024-02-07 14:55:09,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:55:09,314 INFO L85 PathProgramCache]: Analyzing trace with hash 124698204, now seen corresponding path program 1 times [2024-02-07 14:55:09,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:55:09,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757068891] [2024-02-07 14:55:09,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:55:09,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:55:09,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:55:09,331 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 14:55:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:55:09,347 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 14:55:09,347 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 14:55:09,347 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2024-02-07 14:55:09,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 25 remaining) [2024-02-07 14:55:09,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 25 remaining) [2024-02-07 14:55:09,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 25 remaining) [2024-02-07 14:55:09,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 25 remaining) [2024-02-07 14:55:09,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 25 remaining) [2024-02-07 14:55:09,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 25 remaining) [2024-02-07 14:55:09,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (17 of 25 remaining) [2024-02-07 14:55:09,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION (16 of 25 remaining) [2024-02-07 14:55:09,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 25 remaining) [2024-02-07 14:55:09,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 25 remaining) [2024-02-07 14:55:09,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 25 remaining) [2024-02-07 14:55:09,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 25 remaining) [2024-02-07 14:55:09,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 25 remaining) [2024-02-07 14:55:09,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONERROR_FUNCTION (10 of 25 remaining) [2024-02-07 14:55:09,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 25 remaining) [2024-02-07 14:55:09,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 25 remaining) [2024-02-07 14:55:09,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 25 remaining) [2024-02-07 14:55:09,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 25 remaining) [2024-02-07 14:55:09,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONERROR_FUNCTION (5 of 25 remaining) [2024-02-07 14:55:09,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 25 remaining) [2024-02-07 14:55:09,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 25 remaining) [2024-02-07 14:55:09,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 25 remaining) [2024-02-07 14:55:09,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 25 remaining) [2024-02-07 14:55:09,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 25 remaining) [2024-02-07 14:55:09,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-07 14:55:09,361 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-02-07 14:55:09,362 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 14:55:09,362 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-07 14:55:09,418 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-02-07 14:55:09,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 253 transitions, 533 flow [2024-02-07 14:55:09,746 INFO L124 PetriNetUnfolderBase]: 148/567 cut-off events. [2024-02-07 14:55:09,747 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-02-07 14:55:09,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 567 events. 148/567 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3268 event pairs, 1 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 407. Up to 16 conditions per place. [2024-02-07 14:55:09,750 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 253 transitions, 533 flow [2024-02-07 14:55:09,754 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 253 transitions, 533 flow [2024-02-07 14:55:09,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:55:09,755 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;@8928b78, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:55:09,755 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-02-07 14:55:09,756 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:55:09,756 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-02-07 14:55:09,756 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:55:09,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:55:09,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-07 14:55:09,756 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr6ASSERT_VIOLATIONWITNESS_INVARIANT (and 27 more)] === [2024-02-07 14:55:09,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:55:09,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1206530, now seen corresponding path program 1 times [2024-02-07 14:55:09,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:55:09,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532945487] [2024-02-07 14:55:09,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:55:09,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:55:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:55:09,767 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 14:55:09,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:55:09,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532945487] [2024-02-07 14:55:09,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532945487] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:55:09,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:55:09,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:55:09,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622053634] [2024-02-07 14:55:09,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:55:09,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:55:09,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:55:09,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:55:09,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:55:09,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 253 [2024-02-07 14:55:09,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 253 transitions, 533 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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 14:55:09,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:55:09,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 253 [2024-02-07 14:55:09,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand