./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack-1.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack-1.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 13967880 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/stack-1.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack-1.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.extract-columns-1396788-m [2024-02-02 16:06:49,949 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-02 16:06:50,017 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-02 16:06:50,023 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-02 16:06:50,023 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-02 16:06:50,047 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-02 16:06:50,048 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-02 16:06:50,048 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-02 16:06:50,049 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-02 16:06:50,051 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-02 16:06:50,052 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-02 16:06:50,052 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-02 16:06:50,052 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-02 16:06:50,053 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-02 16:06:50,054 INFO L153 SettingsManager]: * Use SBE=true [2024-02-02 16:06:50,054 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-02 16:06:50,054 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-02 16:06:50,054 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-02 16:06:50,055 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-02 16:06:50,055 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-02 16:06:50,055 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-02 16:06:50,055 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-02 16:06:50,056 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-02 16:06:50,056 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-02 16:06:50,056 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-02 16:06:50,056 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-02 16:06:50,056 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-02 16:06:50,057 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-02 16:06:50,057 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-02 16:06:50,057 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-02 16:06:50,058 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-02 16:06:50,058 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-02 16:06:50,059 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 16:06:50,059 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-02 16:06:50,059 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-02 16:06:50,059 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-02 16:06:50,059 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-02 16:06:50,060 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-02 16:06:50,060 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-02 16:06:50,060 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-02 16:06:50,060 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-02 16:06:50,061 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-02 16:06:50,061 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-02 16:06:50,061 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-02 16:06:50,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-02 16:06:50,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-02 16:06:50,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-02 16:06:50,375 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-02 16:06:50,376 INFO L274 PluginConnector]: CDTParser initialized [2024-02-02 16:06:50,377 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-1.i [2024-02-02 16:06:51,420 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-02 16:06:51,641 INFO L384 CDTParser]: Found 1 translation units. [2024-02-02 16:06:51,642 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i [2024-02-02 16:06:51,658 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c102846e/55397ed1b5854dfaa5865be980775367/FLAGb5df17b23 [2024-02-02 16:06:51,667 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c102846e/55397ed1b5854dfaa5865be980775367 [2024-02-02 16:06:51,669 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-02 16:06:51,670 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-02 16:06:51,671 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack-1.yml/witness.yml [2024-02-02 16:06:51,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-02 16:06:51,753 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-02 16:06:51,754 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-02 16:06:51,754 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-02 16:06:51,758 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-02 16:06:51,758 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 04:06:51" (1/2) ... [2024-02-02 16:06:51,759 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@265cf042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:06:51, skipping insertion in model container [2024-02-02 16:06:51,759 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 04:06:51" (1/2) ... [2024-02-02 16:06:51,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3d0fee8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 04:06:51, skipping insertion in model container [2024-02-02 16:06:51,761 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 04:06:51" (2/2) ... [2024-02-02 16:06:51,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@265cf042 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:06:51, skipping insertion in model container [2024-02-02 16:06:51,761 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 04:06:51" (2/2) ... [2024-02-02 16:06:51,762 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-02 16:06:51,831 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-02 16:06:51,832 INFO L101 nessWitnessExtractor]: Location invariant before [L1012-L1012] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-02 16:06:51,832 INFO L101 nessWitnessExtractor]: Location invariant before [L997-L997] ((unsigned long )arg == 0UL) && (((((((((i == 4 || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (0 == i && i == 0)) || (0 == i && i == 0)) || i == 4) [2024-02-02 16:06:51,832 INFO L101 nessWitnessExtractor]: Location invariant before [L1016-L1016] (i == 5) && ((unsigned long )arg == 0UL) [2024-02-02 16:06:51,832 INFO L101 nessWitnessExtractor]: Location invariant before [L1022-L1022] flag == (_Bool)0 [2024-02-02 16:06:51,832 INFO L101 nessWitnessExtractor]: Location invariant before [L995-L995] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-02 16:06:51,832 INFO L101 nessWitnessExtractor]: Location invariant before [L1008-L1008] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-02 16:06:51,833 INFO L101 nessWitnessExtractor]: Location invariant before [L1009-L1009] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-02 16:06:51,833 INFO L101 nessWitnessExtractor]: Location invariant before [L994-L994] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-02 16:06:51,833 INFO L101 nessWitnessExtractor]: Location invariant before [L1001-L1001] (i == 5) && ((unsigned long )arg == 0UL) [2024-02-02 16:06:51,833 INFO L101 nessWitnessExtractor]: Location invariant before [L1014-L1014] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-02 16:06:51,833 INFO L101 nessWitnessExtractor]: Location invariant before [L998-L998] ((unsigned long )arg == 0UL) && ((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || i == 4) [2024-02-02 16:06:51,833 INFO L101 nessWitnessExtractor]: Loop invariant at [L1006-L1006] (unsigned long )arg == 0UL [2024-02-02 16:06:51,833 INFO L101 nessWitnessExtractor]: Loop invariant at [L992-L992] (unsigned long )arg == 0UL [2024-02-02 16:06:51,834 INFO L101 nessWitnessExtractor]: Location invariant before [L999-L999] ((unsigned long )arg == 0UL) && ((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || i == 4) [2024-02-02 16:06:51,834 INFO L101 nessWitnessExtractor]: Location invariant before [L1021-L1021] flag == (_Bool)0 [2024-02-02 16:06:51,834 INFO L101 nessWitnessExtractor]: Location invariant before [L1011-L1011] ((unsigned long )arg == 0UL) && ((((((((i == 4 || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (0 == i && i == 0)) || (0 == i && i == 0)) [2024-02-02 16:06:51,834 INFO L101 nessWitnessExtractor]: Location invariant before [L996-L996] ((unsigned long )arg == 0UL) && ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) [2024-02-02 16:06:51,889 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-02-02 16:06:52,225 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i[41520,41533] [2024-02-02 16:06:52,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 16:06:52,265 INFO L204 MainTranslator]: Completed pre-run [2024-02-02 16:06:52,301 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i[41520,41533] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-02 16:06:52,358 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 16:06:52,395 INFO L208 MainTranslator]: Completed translation [2024-02-02 16:06:52,395 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:06:52 WrapperNode [2024-02-02 16:06:52,395 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-02 16:06:52,396 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-02 16:06:52,396 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-02 16:06:52,396 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-02 16:06:52,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:06:52" (1/1) ... [2024-02-02 16:06:52,417 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:06:52" (1/1) ... [2024-02-02 16:06:52,463 INFO L138 Inliner]: procedures = 278, calls = 45, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 177 [2024-02-02 16:06:52,464 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-02 16:06:52,465 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-02 16:06:52,465 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-02 16:06:52,465 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-02 16:06:52,474 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:06:52" (1/1) ... [2024-02-02 16:06:52,474 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:06:52" (1/1) ... [2024-02-02 16:06:52,477 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:06:52" (1/1) ... [2024-02-02 16:06:52,489 INFO L175 MemorySlicer]: Split 18 memory accesses to 5 slices as follows [2, 5, 7, 2, 2]. 39 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5, 0, 0]. The 3 writes are split as follows [0, 0, 1, 1, 1]. [2024-02-02 16:06:52,491 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:06:52" (1/1) ... [2024-02-02 16:06:52,492 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:06:52" (1/1) ... [2024-02-02 16:06:52,505 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:06:52" (1/1) ... [2024-02-02 16:06:52,508 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:06:52" (1/1) ... [2024-02-02 16:06:52,510 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:06:52" (1/1) ... [2024-02-02 16:06:52,511 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:06:52" (1/1) ... [2024-02-02 16:06:52,513 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-02 16:06:52,514 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-02 16:06:52,514 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-02 16:06:52,514 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-02 16:06:52,521 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:06:52" (1/1) ... [2024-02-02 16:06:52,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 16:06:52,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 16:06:52,544 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) [2024-02-02 16:06:52,547 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 [2024-02-02 16:06:52,581 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-02-02 16:06:52,581 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-02-02 16:06:52,582 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-02-02 16:06:52,582 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-02-02 16:06:52,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-02 16:06:52,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-02 16:06:52,583 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-02 16:06:52,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-02 16:06:52,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-02 16:06:52,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-02 16:06:52,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-02 16:06:52,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-02 16:06:52,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-02 16:06:52,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-02 16:06:52,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-02 16:06:52,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-02 16:06:52,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-02 16:06:52,584 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-02 16:06:52,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-02 16:06:52,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-02 16:06:52,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-02 16:06:52,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-02 16:06:52,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-02 16:06:52,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-02 16:06:52,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-02 16:06:52,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-02 16:06:52,586 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-02 16:06:52,725 INFO L244 CfgBuilder]: Building ICFG [2024-02-02 16:06:52,727 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-02 16:06:52,983 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-02 16:06:52,983 INFO L293 CfgBuilder]: Performing block encoding [2024-02-02 16:06:53,127 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-02 16:06:53,127 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-02 16:06:53,127 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 04:06:53 BoogieIcfgContainer [2024-02-02 16:06:53,128 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-02 16:06:53,129 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-02 16:06:53,129 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-02 16:06:53,132 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-02 16:06:53,132 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 04:06:51" (1/4) ... [2024-02-02 16:06:53,132 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@245bacc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 04:06:53, skipping insertion in model container [2024-02-02 16:06:53,133 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 04:06:51" (2/4) ... [2024-02-02 16:06:53,133 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@245bacc6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 02.02 04:06:53, skipping insertion in model container [2024-02-02 16:06:53,133 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 04:06:52" (3/4) ... [2024-02-02 16:06:53,133 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@245bacc6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 02.02 04:06:53, skipping insertion in model container [2024-02-02 16:06:53,133 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 04:06:53" (4/4) ... [2024-02-02 16:06:53,134 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2024-02-02 16:06:53,149 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-02 16:06:53,149 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2024-02-02 16:06:53,149 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-02 16:06:53,237 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-02 16:06:53,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 69 transitions, 152 flow [2024-02-02 16:06:53,301 INFO L124 PetriNetUnfolderBase]: 5/67 cut-off events. [2024-02-02 16:06:53,302 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-02 16:06:53,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 67 events. 5/67 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 194 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2024-02-02 16:06:53,306 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 69 transitions, 152 flow [2024-02-02 16:06:53,308 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 65 transitions, 139 flow [2024-02-02 16:06:53,320 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 16:06:53,326 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;@3bce4a4e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 16:06:53,326 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-02-02 16:06:53,328 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 16:06:53,329 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-02 16:06:53,329 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 16:06:53,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:06:53,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-02 16:06:53,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:06:53,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:06:53,335 INFO L85 PathProgramCache]: Analyzing trace with hash 14567, now seen corresponding path program 1 times [2024-02-02 16:06:53,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:06:53,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389393752] [2024-02-02 16:06:53,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:06:53,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:06:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:06:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:06:53,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:06:53,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389393752] [2024-02-02 16:06:53,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389393752] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:06:53,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:06:53,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-02 16:06:53,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172466536] [2024-02-02 16:06:53,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:06:53,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 16:06:53,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:06:53,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 16:06:53,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 16:06:53,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-02-02 16:06:53,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2024-02-02 16:06:53,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:06:53,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-02-02 16:06:53,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:06:53,878 INFO L124 PetriNetUnfolderBase]: 411/1082 cut-off events. [2024-02-02 16:06:53,879 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-02-02 16:06:53,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1808 conditions, 1082 events. 411/1082 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6940 event pairs, 337 based on Foata normal form. 48/924 useless extension candidates. Maximal degree in co-relation 1690. Up to 686 conditions per place. [2024-02-02 16:06:53,891 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 30 selfloop transitions, 1 changer transitions 0/61 dead transitions. [2024-02-02 16:06:53,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 193 flow [2024-02-02 16:06:53,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 16:06:53,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 16:06:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2024-02-02 16:06:53,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6328502415458938 [2024-02-02 16:06:53,905 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 139 flow. Second operand 3 states and 131 transitions. [2024-02-02 16:06:53,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 193 flow [2024-02-02 16:06:53,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-02 16:06:53,913 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 128 flow [2024-02-02 16:06:53,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-02-02 16:06:53,917 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -3 predicate places. [2024-02-02 16:06:53,917 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 128 flow [2024-02-02 16:06:53,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2024-02-02 16:06:53,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:06:53,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-02 16:06:53,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-02 16:06:53,918 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:06:53,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:06:53,919 INFO L85 PathProgramCache]: Analyzing trace with hash 582899403, now seen corresponding path program 1 times [2024-02-02 16:06:53,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:06:53,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403720528] [2024-02-02 16:06:53,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:06:53,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:06:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:06:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:06:54,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:06:54,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403720528] [2024-02-02 16:06:54,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403720528] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:06:54,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:06:54,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:06:54,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343771598] [2024-02-02 16:06:54,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:06:54,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:06:54,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:06:54,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:06:54,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:06:54,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2024-02-02 16:06:54,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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) [2024-02-02 16:06:54,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:06:54,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2024-02-02 16:06:54,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:06:54,239 INFO L124 PetriNetUnfolderBase]: 428/1053 cut-off events. [2024-02-02 16:06:54,239 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-02 16:06:54,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1795 conditions, 1053 events. 428/1053 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6725 event pairs, 30 based on Foata normal form. 0/897 useless extension candidates. Maximal degree in co-relation 1789. Up to 678 conditions per place. [2024-02-02 16:06:54,244 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 42 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2024-02-02 16:06:54,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 242 flow [2024-02-02 16:06:54,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:06:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:06:54,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 177 transitions. [2024-02-02 16:06:54,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-02-02 16:06:54,247 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 128 flow. Second operand 4 states and 177 transitions. [2024-02-02 16:06:54,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 242 flow [2024-02-02 16:06:54,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 73 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 16:06:54,248 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 129 flow [2024-02-02 16:06:54,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2024-02-02 16:06:54,249 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2024-02-02 16:06:54,249 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 129 flow [2024-02-02 16:06:54,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 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) [2024-02-02 16:06:54,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:06:54,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:06:54,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-02 16:06:54,250 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:06:54,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:06:54,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1819902493, now seen corresponding path program 1 times [2024-02-02 16:06:54,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:06:54,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888866397] [2024-02-02 16:06:54,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:06:54,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:06:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:06:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:06:54,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:06:54,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888866397] [2024-02-02 16:06:54,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888866397] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:06:54,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:06:54,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:06:54,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808417963] [2024-02-02 16:06:54,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:06:54,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:06:54,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:06:54,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:06:54,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:06:54,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2024-02-02 16:06:54,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2024-02-02 16:06:54,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:06:54,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2024-02-02 16:06:54,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:06:54,508 INFO L124 PetriNetUnfolderBase]: 393/1070 cut-off events. [2024-02-02 16:06:54,508 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-02-02 16:06:54,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1774 conditions, 1070 events. 393/1070 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 7012 event pairs, 11 based on Foata normal form. 0/887 useless extension candidates. Maximal degree in co-relation 1768. Up to 564 conditions per place. [2024-02-02 16:06:54,514 INFO L140 encePairwiseOnDemand]: 66/69 looper letters, 56 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2024-02-02 16:06:54,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 86 transitions, 302 flow [2024-02-02 16:06:54,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:06:54,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:06:54,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 191 transitions. [2024-02-02 16:06:54,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6920289855072463 [2024-02-02 16:06:54,519 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 129 flow. Second operand 4 states and 191 transitions. [2024-02-02 16:06:54,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 86 transitions, 302 flow [2024-02-02 16:06:54,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 86 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 16:06:54,521 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 128 flow [2024-02-02 16:06:54,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-02-02 16:06:54,522 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2024-02-02 16:06:54,523 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 128 flow [2024-02-02 16:06:54,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2024-02-02 16:06:54,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:06:54,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:06:54,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-02 16:06:54,524 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:06:54,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:06:54,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1820593646, now seen corresponding path program 1 times [2024-02-02 16:06:54,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:06:54,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77022995] [2024-02-02 16:06:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:06:54,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:06:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:06:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:06:54,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:06:54,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77022995] [2024-02-02 16:06:54,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77022995] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:06:54,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:06:54,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-02 16:06:54,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568655969] [2024-02-02 16:06:54,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:06:54,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 16:06:54,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:06:54,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 16:06:54,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 16:06:54,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 69 [2024-02-02 16:06:54,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2024-02-02 16:06:54,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:06:54,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 69 [2024-02-02 16:06:54,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:06:54,851 INFO L124 PetriNetUnfolderBase]: 882/1932 cut-off events. [2024-02-02 16:06:54,853 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-02-02 16:06:54,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3552 conditions, 1932 events. 882/1932 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 12144 event pairs, 526 based on Foata normal form. 88/1721 useless extension candidates. Maximal degree in co-relation 3546. Up to 1018 conditions per place. [2024-02-02 16:06:54,862 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 56 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2024-02-02 16:06:54,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 292 flow [2024-02-02 16:06:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 16:06:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 16:06:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2024-02-02 16:06:54,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7053140096618358 [2024-02-02 16:06:54,864 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 128 flow. Second operand 3 states and 146 transitions. [2024-02-02 16:06:54,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 292 flow [2024-02-02 16:06:54,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 16:06:54,867 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 149 flow [2024-02-02 16:06:54,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2024-02-02 16:06:54,868 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -1 predicate places. [2024-02-02 16:06:54,869 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 149 flow [2024-02-02 16:06:54,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2024-02-02 16:06:54,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:06:54,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:06:54,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-02 16:06:54,869 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:06:54,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:06:54,870 INFO L85 PathProgramCache]: Analyzing trace with hash 874623008, now seen corresponding path program 1 times [2024-02-02 16:06:54,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:06:54,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535086756] [2024-02-02 16:06:54,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:06:54,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:06:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:06:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:06:54,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:06:54,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535086756] [2024-02-02 16:06:54,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535086756] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:06:54,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:06:54,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-02 16:06:54,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740400108] [2024-02-02 16:06:54,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:06:54,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 16:06:54,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:06:54,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 16:06:54,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 16:06:54,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 69 [2024-02-02 16:06:54,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2024-02-02 16:06:54,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:06:54,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 69 [2024-02-02 16:06:54,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:06:55,236 INFO L124 PetriNetUnfolderBase]: 1382/3218 cut-off events. [2024-02-02 16:06:55,236 INFO L125 PetriNetUnfolderBase]: For 184/196 co-relation queries the response was YES. [2024-02-02 16:06:55,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5941 conditions, 3218 events. 1382/3218 cut-off events. For 184/196 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 23190 event pairs, 882 based on Foata normal form. 210/3137 useless extension candidates. Maximal degree in co-relation 5934. Up to 1694 conditions per place. [2024-02-02 16:06:55,251 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 57 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2024-02-02 16:06:55,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 82 transitions, 323 flow [2024-02-02 16:06:55,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 16:06:55,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 16:06:55,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2024-02-02 16:06:55,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7101449275362319 [2024-02-02 16:06:55,253 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 149 flow. Second operand 3 states and 147 transitions. [2024-02-02 16:06:55,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 82 transitions, 323 flow [2024-02-02 16:06:55,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 82 transitions, 319 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 16:06:55,256 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 169 flow [2024-02-02 16:06:55,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2024-02-02 16:06:55,258 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 1 predicate places. [2024-02-02 16:06:55,258 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 169 flow [2024-02-02 16:06:55,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2024-02-02 16:06:55,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:06:55,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:06:55,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-02 16:06:55,259 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:06:55,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:06:55,259 INFO L85 PathProgramCache]: Analyzing trace with hash 2042549014, now seen corresponding path program 1 times [2024-02-02 16:06:55,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:06:55,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770071012] [2024-02-02 16:06:55,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:06:55,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:06:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:06:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:06:55,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:06:55,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770071012] [2024-02-02 16:06:55,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770071012] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:06:55,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:06:55,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:06:55,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649396788] [2024-02-02 16:06:55,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:06:55,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 16:06:55,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:06:55,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 16:06:55,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 16:06:55,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 69 [2024-02-02 16:06:55,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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) [2024-02-02 16:06:55,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:06:55,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 69 [2024-02-02 16:06:55,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:06:55,590 INFO L124 PetriNetUnfolderBase]: 1013/2417 cut-off events. [2024-02-02 16:06:55,591 INFO L125 PetriNetUnfolderBase]: For 206/232 co-relation queries the response was YES. [2024-02-02 16:06:55,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4808 conditions, 2417 events. 1013/2417 cut-off events. For 206/232 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 16553 event pairs, 159 based on Foata normal form. 22/2335 useless extension candidates. Maximal degree in co-relation 4800. Up to 1291 conditions per place. [2024-02-02 16:06:55,601 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 62 selfloop transitions, 3 changer transitions 0/92 dead transitions. [2024-02-02 16:06:55,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 387 flow [2024-02-02 16:06:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 16:06:55,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 16:06:55,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2024-02-02 16:06:55,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2024-02-02 16:06:55,603 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 169 flow. Second operand 4 states and 195 transitions. [2024-02-02 16:06:55,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 387 flow [2024-02-02 16:06:55,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 92 transitions, 379 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-02-02 16:06:55,608 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 187 flow [2024-02-02 16:06:55,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-02-02 16:06:55,611 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 5 predicate places. [2024-02-02 16:06:55,611 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 187 flow [2024-02-02 16:06:55,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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) [2024-02-02 16:06:55,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:06:55,611 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:06:55,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-02 16:06:55,612 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:06:55,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:06:55,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1023015108, now seen corresponding path program 1 times [2024-02-02 16:06:55,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:06:55,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633386459] [2024-02-02 16:06:55,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:06:55,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:06:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:06:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:06:55,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:06:55,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633386459] [2024-02-02 16:06:55,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633386459] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 16:06:55,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598717096] [2024-02-02 16:06:55,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:06:55,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 16:06:55,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 16:06:55,733 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) [2024-02-02 16:06:55,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-02 16:06:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:06:55,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-02 16:06:55,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 16:06:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:06:55,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 16:06:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:06:56,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598717096] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 16:06:56,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 16:06:56,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2024-02-02 16:06:56,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264207578] [2024-02-02 16:06:56,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 16:06:56,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-02 16:06:56,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:06:56,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-02 16:06:56,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-02-02 16:06:56,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 69 [2024-02-02 16:06:56,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 187 flow. Second operand has 8 states, 8 states have (on average 26.75) internal successors, (214), 8 states have internal predecessors, (214), 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) [2024-02-02 16:06:56,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:06:56,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 69 [2024-02-02 16:06:56,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:06:56,854 INFO L124 PetriNetUnfolderBase]: 2598/4972 cut-off events. [2024-02-02 16:06:56,855 INFO L125 PetriNetUnfolderBase]: For 1179/1263 co-relation queries the response was YES. [2024-02-02 16:06:56,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10753 conditions, 4972 events. 2598/4972 cut-off events. For 1179/1263 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 29128 event pairs, 111 based on Foata normal form. 648/5405 useless extension candidates. Maximal degree in co-relation 10742. Up to 970 conditions per place. [2024-02-02 16:06:56,878 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 157 selfloop transitions, 6 changer transitions 0/181 dead transitions. [2024-02-02 16:06:56,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 181 transitions, 858 flow [2024-02-02 16:06:56,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-02 16:06:56,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-02 16:06:56,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 324 transitions. [2024-02-02 16:06:56,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6708074534161491 [2024-02-02 16:06:56,880 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 187 flow. Second operand 7 states and 324 transitions. [2024-02-02 16:06:56,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 181 transitions, 858 flow [2024-02-02 16:06:56,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 181 transitions, 851 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 16:06:56,884 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 204 flow [2024-02-02 16:06:56,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=204, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2024-02-02 16:06:56,885 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2024-02-02 16:06:56,885 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 204 flow [2024-02-02 16:06:56,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.75) internal successors, (214), 8 states have internal predecessors, (214), 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) [2024-02-02 16:06:56,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:06:56,885 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:06:56,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-02 16:06:57,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 16:06:57,099 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:06:57,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:06:57,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1487954029, now seen corresponding path program 1 times [2024-02-02 16:06:57,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:06:57,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317090228] [2024-02-02 16:06:57,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:06:57,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:06:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:06:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:06:57,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:06:57,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317090228] [2024-02-02 16:06:57,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317090228] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 16:06:57,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721937991] [2024-02-02 16:06:57,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:06:57,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 16:06:57,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 16:06:57,201 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) [2024-02-02 16:06:57,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-02 16:06:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:06:57,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-02 16:06:57,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 16:06:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:06:57,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 16:06:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:06:57,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721937991] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 16:06:57,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 16:06:57,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2024-02-02 16:06:57,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985945073] [2024-02-02 16:06:57,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 16:06:57,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-02 16:06:57,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:06:57,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-02 16:06:57,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-02-02 16:06:57,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 69 [2024-02-02 16:06:57,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 204 flow. Second operand has 8 states, 8 states have (on average 27.25) internal successors, (218), 8 states have internal predecessors, (218), 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) [2024-02-02 16:06:57,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:06:57,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 69 [2024-02-02 16:06:57,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:06:58,542 INFO L124 PetriNetUnfolderBase]: 4586/8199 cut-off events. [2024-02-02 16:06:58,542 INFO L125 PetriNetUnfolderBase]: For 4046/4046 co-relation queries the response was YES. [2024-02-02 16:06:58,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18822 conditions, 8199 events. 4586/8199 cut-off events. For 4046/4046 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 52442 event pairs, 163 based on Foata normal form. 1080/8579 useless extension candidates. Maximal degree in co-relation 18807. Up to 1928 conditions per place. [2024-02-02 16:06:58,582 INFO L140 encePairwiseOnDemand]: 59/69 looper letters, 144 selfloop transitions, 6 changer transitions 0/164 dead transitions. [2024-02-02 16:06:58,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 164 transitions, 906 flow [2024-02-02 16:06:58,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-02 16:06:58,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-02 16:06:58,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 314 transitions. [2024-02-02 16:06:58,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.650103519668737 [2024-02-02 16:06:58,584 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 204 flow. Second operand 7 states and 314 transitions. [2024-02-02 16:06:58,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 164 transitions, 906 flow [2024-02-02 16:06:58,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 164 transitions, 852 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-02-02 16:06:58,590 INFO L231 Difference]: Finished difference. Result has 78 places, 58 transitions, 212 flow [2024-02-02 16:06:58,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=212, PETRI_PLACES=78, PETRI_TRANSITIONS=58} [2024-02-02 16:06:58,592 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 11 predicate places. [2024-02-02 16:06:58,592 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 58 transitions, 212 flow [2024-02-02 16:06:58,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.25) internal successors, (218), 8 states have internal predecessors, (218), 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) [2024-02-02 16:06:58,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:06:58,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:06:58,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-02-02 16:06:58,804 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,SelfDestructingSolverStorable7 [2024-02-02 16:06:58,804 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:06:58,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:06:58,804 INFO L85 PathProgramCache]: Analyzing trace with hash -310289528, now seen corresponding path program 1 times [2024-02-02 16:06:58,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:06:58,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479251026] [2024-02-02 16:06:58,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:06:58,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:06:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:06:58,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:06:58,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:06:58,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479251026] [2024-02-02 16:06:58,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479251026] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:06:58,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:06:58,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 16:06:58,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676413876] [2024-02-02 16:06:58,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:06:58,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 16:06:58,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:06:58,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 16:06:58,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 16:06:58,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 69 [2024-02-02 16:06:58,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 58 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2024-02-02 16:06:58,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:06:58,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 69 [2024-02-02 16:06:58,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:06:59,335 INFO L124 PetriNetUnfolderBase]: 1677/4376 cut-off events. [2024-02-02 16:06:59,335 INFO L125 PetriNetUnfolderBase]: For 2955/2955 co-relation queries the response was YES. [2024-02-02 16:06:59,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9975 conditions, 4376 events. 1677/4376 cut-off events. For 2955/2955 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 27887 event pairs, 504 based on Foata normal form. 276/4460 useless extension candidates. Maximal degree in co-relation 9956. Up to 2067 conditions per place. [2024-02-02 16:06:59,362 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 56 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2024-02-02 16:06:59,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 79 transitions, 440 flow [2024-02-02 16:06:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 16:06:59,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 16:06:59,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2024-02-02 16:06:59,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7246376811594203 [2024-02-02 16:06:59,363 INFO L175 Difference]: Start difference. First operand has 78 places, 58 transitions, 212 flow. Second operand 3 states and 150 transitions. [2024-02-02 16:06:59,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 79 transitions, 440 flow [2024-02-02 16:06:59,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 79 transitions, 422 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-02-02 16:06:59,369 INFO L231 Difference]: Finished difference. Result has 78 places, 58 transitions, 211 flow [2024-02-02 16:06:59,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=78, PETRI_TRANSITIONS=58} [2024-02-02 16:06:59,370 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 11 predicate places. [2024-02-02 16:06:59,370 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 58 transitions, 211 flow [2024-02-02 16:06:59,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2024-02-02 16:06:59,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:06:59,371 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:06:59,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-02 16:06:59,371 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:06:59,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:06:59,372 INFO L85 PathProgramCache]: Analyzing trace with hash 210038715, now seen corresponding path program 1 times [2024-02-02 16:06:59,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:06:59,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765141911] [2024-02-02 16:06:59,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:06:59,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:06:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:06:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:06:59,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:06:59,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765141911] [2024-02-02 16:06:59,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765141911] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 16:06:59,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839738947] [2024-02-02 16:06:59,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:06:59,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 16:06:59,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 16:06:59,532 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) [2024-02-02 16:06:59,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-02 16:06:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:06:59,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-02 16:06:59,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 16:06:59,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-02 16:06:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:06:59,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 16:06:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:06:59,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839738947] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 16:06:59,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 16:06:59,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-02-02 16:06:59,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081943940] [2024-02-02 16:06:59,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 16:06:59,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-02 16:06:59,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:06:59,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-02 16:06:59,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-02-02 16:06:59,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-02-02 16:06:59,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 58 transitions, 211 flow. Second operand has 8 states, 8 states have (on average 37.625) internal successors, (301), 8 states have internal predecessors, (301), 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) [2024-02-02 16:06:59,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:06:59,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-02-02 16:06:59,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:01,238 INFO L124 PetriNetUnfolderBase]: 5145/12095 cut-off events. [2024-02-02 16:07:01,239 INFO L125 PetriNetUnfolderBase]: For 9216/9216 co-relation queries the response was YES. [2024-02-02 16:07:01,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30328 conditions, 12095 events. 5145/12095 cut-off events. For 9216/9216 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 96214 event pairs, 999 based on Foata normal form. 114/11925 useless extension candidates. Maximal degree in co-relation 30309. Up to 1977 conditions per place. [2024-02-02 16:07:01,298 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 213 selfloop transitions, 19 changer transitions 0/249 dead transitions. [2024-02-02 16:07:01,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 249 transitions, 1506 flow [2024-02-02 16:07:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-02 16:07:01,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-02 16:07:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 574 transitions. [2024-02-02 16:07:01,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6932367149758454 [2024-02-02 16:07:01,301 INFO L175 Difference]: Start difference. First operand has 78 places, 58 transitions, 211 flow. Second operand 12 states and 574 transitions. [2024-02-02 16:07:01,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 249 transitions, 1506 flow [2024-02-02 16:07:01,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 249 transitions, 1484 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 16:07:01,323 INFO L231 Difference]: Finished difference. Result has 94 places, 76 transitions, 341 flow [2024-02-02 16:07:01,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=341, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2024-02-02 16:07:01,324 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 27 predicate places. [2024-02-02 16:07:01,324 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 341 flow [2024-02-02 16:07:01,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 37.625) internal successors, (301), 8 states have internal predecessors, (301), 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) [2024-02-02 16:07:01,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:01,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:07:01,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-02 16:07:01,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 16:07:01,537 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:01,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:01,538 INFO L85 PathProgramCache]: Analyzing trace with hash 281684191, now seen corresponding path program 1 times [2024-02-02 16:07:01,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:01,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236843848] [2024-02-02 16:07:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:01,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:02,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:02,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236843848] [2024-02-02 16:07:02,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236843848] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:07:02,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:07:02,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-02 16:07:02,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471480170] [2024-02-02 16:07:02,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:07:02,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-02 16:07:02,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:02,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-02 16:07:02,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-02-02 16:07:02,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-02-02 16:07:02,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 34.857142857142854) internal successors, (244), 7 states have internal predecessors, (244), 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) [2024-02-02 16:07:02,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:02,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-02-02 16:07:02,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:03,366 INFO L124 PetriNetUnfolderBase]: 4975/11593 cut-off events. [2024-02-02 16:07:03,366 INFO L125 PetriNetUnfolderBase]: For 12048/12048 co-relation queries the response was YES. [2024-02-02 16:07:03,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30710 conditions, 11593 events. 4975/11593 cut-off events. For 12048/12048 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 91295 event pairs, 1692 based on Foata normal form. 16/11357 useless extension candidates. Maximal degree in co-relation 30683. Up to 7372 conditions per place. [2024-02-02 16:07:03,442 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 116 selfloop transitions, 7 changer transitions 0/140 dead transitions. [2024-02-02 16:07:03,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 140 transitions, 865 flow [2024-02-02 16:07:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-02 16:07:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-02 16:07:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 315 transitions. [2024-02-02 16:07:03,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-02-02 16:07:03,444 INFO L175 Difference]: Start difference. First operand has 94 places, 76 transitions, 341 flow. Second operand 7 states and 315 transitions. [2024-02-02 16:07:03,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 140 transitions, 865 flow [2024-02-02 16:07:03,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 140 transitions, 851 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-02-02 16:07:03,476 INFO L231 Difference]: Finished difference. Result has 103 places, 81 transitions, 388 flow [2024-02-02 16:07:03,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=388, PETRI_PLACES=103, PETRI_TRANSITIONS=81} [2024-02-02 16:07:03,476 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 36 predicate places. [2024-02-02 16:07:03,477 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 81 transitions, 388 flow [2024-02-02 16:07:03,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.857142857142854) internal successors, (244), 7 states have internal predecessors, (244), 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) [2024-02-02 16:07:03,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:03,477 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:07:03,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-02 16:07:03,478 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:03,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:03,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1980576520, now seen corresponding path program 1 times [2024-02-02 16:07:03,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:03,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217160317] [2024-02-02 16:07:03,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:03,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:03,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:03,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217160317] [2024-02-02 16:07:03,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217160317] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 16:07:03,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154570091] [2024-02-02 16:07:03,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:03,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 16:07:03,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 16:07:03,953 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) [2024-02-02 16:07:03,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-02 16:07:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:04,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-02 16:07:04,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 16:07:04,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-02 16:07:04,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2024-02-02 16:07:04,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2024-02-02 16:07:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:04,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 16:07:04,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2024-02-02 16:07:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:04,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154570091] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 16:07:04,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 16:07:04,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2024-02-02 16:07:04,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499899966] [2024-02-02 16:07:04,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 16:07:04,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-02 16:07:04,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:04,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-02 16:07:04,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2024-02-02 16:07:04,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-02-02 16:07:04,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 81 transitions, 388 flow. Second operand has 19 states, 19 states have (on average 36.26315789473684) internal successors, (689), 19 states have internal predecessors, (689), 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) [2024-02-02 16:07:04,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:04,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-02-02 16:07:04,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:09,999 INFO L124 PetriNetUnfolderBase]: 12375/28449 cut-off events. [2024-02-02 16:07:09,999 INFO L125 PetriNetUnfolderBase]: For 36609/36609 co-relation queries the response was YES. [2024-02-02 16:07:10,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78121 conditions, 28449 events. 12375/28449 cut-off events. For 36609/36609 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 252183 event pairs, 1492 based on Foata normal form. 198/28365 useless extension candidates. Maximal degree in co-relation 78089. Up to 4352 conditions per place. [2024-02-02 16:07:10,211 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 613 selfloop transitions, 109 changer transitions 0/739 dead transitions. [2024-02-02 16:07:10,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 739 transitions, 4998 flow [2024-02-02 16:07:10,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-02-02 16:07:10,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-02-02 16:07:10,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2070 transitions. [2024-02-02 16:07:10,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-02-02 16:07:10,216 INFO L175 Difference]: Start difference. First operand has 103 places, 81 transitions, 388 flow. Second operand 47 states and 2070 transitions. [2024-02-02 16:07:10,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 739 transitions, 4998 flow [2024-02-02 16:07:10,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 739 transitions, 4995 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 16:07:10,297 INFO L231 Difference]: Finished difference. Result has 164 places, 186 transitions, 1283 flow [2024-02-02 16:07:10,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1283, PETRI_PLACES=164, PETRI_TRANSITIONS=186} [2024-02-02 16:07:10,298 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 97 predicate places. [2024-02-02 16:07:10,298 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 186 transitions, 1283 flow [2024-02-02 16:07:10,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 36.26315789473684) internal successors, (689), 19 states have internal predecessors, (689), 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) [2024-02-02 16:07:10,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:10,298 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:07:10,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-02 16:07:10,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 16:07:10,511 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err7ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:10,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:10,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1999286463, now seen corresponding path program 1 times [2024-02-02 16:07:10,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:10,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849917801] [2024-02-02 16:07:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:10,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-02-02 16:07:10,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:10,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849917801] [2024-02-02 16:07:10,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849917801] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:07:10,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:07:10,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-02 16:07:10,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537819289] [2024-02-02 16:07:10,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:07:10,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-02 16:07:10,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:10,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-02 16:07:10,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-02-02 16:07:10,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 69 [2024-02-02 16:07:10,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 186 transitions, 1283 flow. Second operand has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 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) [2024-02-02 16:07:10,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:10,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 69 [2024-02-02 16:07:10,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:15,909 INFO L124 PetriNetUnfolderBase]: 18957/38277 cut-off events. [2024-02-02 16:07:15,909 INFO L125 PetriNetUnfolderBase]: For 63099/63171 co-relation queries the response was YES. [2024-02-02 16:07:16,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114788 conditions, 38277 events. 18957/38277 cut-off events. For 63099/63171 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 325526 event pairs, 5893 based on Foata normal form. 0/38184 useless extension candidates. Maximal degree in co-relation 114739. Up to 22085 conditions per place. [2024-02-02 16:07:16,445 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 362 selfloop transitions, 8 changer transitions 3/412 dead transitions. [2024-02-02 16:07:16,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 412 transitions, 3588 flow [2024-02-02 16:07:16,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 16:07:16,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 16:07:16,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 218 transitions. [2024-02-02 16:07:16,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6318840579710145 [2024-02-02 16:07:16,461 INFO L175 Difference]: Start difference. First operand has 164 places, 186 transitions, 1283 flow. Second operand 5 states and 218 transitions. [2024-02-02 16:07:16,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 412 transitions, 3588 flow [2024-02-02 16:07:16,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 412 transitions, 3234 flow, removed 177 selfloop flow, removed 0 redundant places. [2024-02-02 16:07:16,748 INFO L231 Difference]: Finished difference. Result has 168 places, 186 transitions, 1156 flow [2024-02-02 16:07:16,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=1127, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1156, PETRI_PLACES=168, PETRI_TRANSITIONS=186} [2024-02-02 16:07:16,749 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 101 predicate places. [2024-02-02 16:07:16,749 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 186 transitions, 1156 flow [2024-02-02 16:07:16,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 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) [2024-02-02 16:07:16,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:16,749 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:07:16,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-02 16:07:16,750 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:16,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:16,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1441249002, now seen corresponding path program 1 times [2024-02-02 16:07:16,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:16,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104197843] [2024-02-02 16:07:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:16,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-02 16:07:16,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:16,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104197843] [2024-02-02 16:07:16,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104197843] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 16:07:16,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340658712] [2024-02-02 16:07:16,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:16,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 16:07:16,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 16:07:16,971 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) [2024-02-02 16:07:16,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-02 16:07:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:17,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 8 conjunts are in the unsatisfiable core [2024-02-02 16:07:17,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 16:07:17,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-02 16:07:17,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-02-02 16:07:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:17,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 16:07:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-02 16:07:17,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340658712] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 16:07:17,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 16:07:17,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 14 [2024-02-02 16:07:17,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872216775] [2024-02-02 16:07:17,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 16:07:17,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-02 16:07:17,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:17,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-02 16:07:17,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-02-02 16:07:17,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-02-02 16:07:17,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 186 transitions, 1156 flow. Second operand has 14 states, 14 states have (on average 38.714285714285715) internal successors, (542), 14 states have internal predecessors, (542), 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) [2024-02-02 16:07:17,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:17,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-02-02 16:07:17,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:23,850 INFO L124 PetriNetUnfolderBase]: 16699/37955 cut-off events. [2024-02-02 16:07:23,850 INFO L125 PetriNetUnfolderBase]: For 123454/123454 co-relation queries the response was YES. [2024-02-02 16:07:24,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121864 conditions, 37955 events. 16699/37955 cut-off events. For 123454/123454 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 347554 event pairs, 2789 based on Foata normal form. 340/38043 useless extension candidates. Maximal degree in co-relation 121813. Up to 5798 conditions per place. [2024-02-02 16:07:24,429 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 475 selfloop transitions, 121 changer transitions 6/619 dead transitions. [2024-02-02 16:07:24,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 619 transitions, 5004 flow [2024-02-02 16:07:24,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-02 16:07:24,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-02 16:07:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1126 transitions. [2024-02-02 16:07:24,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6799516908212561 [2024-02-02 16:07:24,433 INFO L175 Difference]: Start difference. First operand has 168 places, 186 transitions, 1156 flow. Second operand 24 states and 1126 transitions. [2024-02-02 16:07:24,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 619 transitions, 5004 flow [2024-02-02 16:07:24,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 619 transitions, 4831 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-02-02 16:07:24,761 INFO L231 Difference]: Finished difference. Result has 200 places, 234 transitions, 1928 flow [2024-02-02 16:07:24,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1928, PETRI_PLACES=200, PETRI_TRANSITIONS=234} [2024-02-02 16:07:24,762 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 133 predicate places. [2024-02-02 16:07:24,762 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 234 transitions, 1928 flow [2024-02-02 16:07:24,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 38.714285714285715) internal successors, (542), 14 states have internal predecessors, (542), 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) [2024-02-02 16:07:24,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:24,762 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:07:24,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-02-02 16:07:24,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-02-02 16:07:24,975 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:24,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:24,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1735138145, now seen corresponding path program 1 times [2024-02-02 16:07:24,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:24,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118837772] [2024-02-02 16:07:24,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:24,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:25,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:25,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118837772] [2024-02-02 16:07:25,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118837772] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 16:07:25,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740426896] [2024-02-02 16:07:25,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:25,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 16:07:25,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 16:07:25,939 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) [2024-02-02 16:07:25,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-02 16:07:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:26,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-02 16:07:26,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 16:07:26,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-02-02 16:07:26,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 19 [2024-02-02 16:07:26,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2024-02-02 16:07:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:26,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 16:07:26,833 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-02 16:07:26,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 12 [2024-02-02 16:07:26,891 INFO L349 Elim1Store]: treesize reduction 8, result has 70.4 percent of original size [2024-02-02 16:07:26,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 111 [2024-02-02 16:07:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 16:07:27,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740426896] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 16:07:27,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 16:07:27,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2024-02-02 16:07:27,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359140447] [2024-02-02 16:07:27,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 16:07:27,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-02 16:07:27,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:27,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-02 16:07:27,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2024-02-02 16:07:27,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 69 [2024-02-02 16:07:27,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 234 transitions, 1928 flow. Second operand has 26 states, 26 states have (on average 35.80769230769231) internal successors, (931), 26 states have internal predecessors, (931), 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) [2024-02-02 16:07:27,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:27,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 69 [2024-02-02 16:07:27,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 16:07:41,990 INFO L124 PetriNetUnfolderBase]: 30987/69336 cut-off events. [2024-02-02 16:07:41,990 INFO L125 PetriNetUnfolderBase]: For 246907/246907 co-relation queries the response was YES. [2024-02-02 16:07:42,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230189 conditions, 69336 events. 30987/69336 cut-off events. For 246907/246907 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 656874 event pairs, 4700 based on Foata normal form. 360/69264 useless extension candidates. Maximal degree in co-relation 230126. Up to 10596 conditions per place. [2024-02-02 16:07:42,773 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 776 selfloop transitions, 400 changer transitions 55/1248 dead transitions. [2024-02-02 16:07:42,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 1248 transitions, 10994 flow [2024-02-02 16:07:42,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-02-02 16:07:42,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2024-02-02 16:07:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 2538 transitions. [2024-02-02 16:07:42,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341829085457271 [2024-02-02 16:07:42,777 INFO L175 Difference]: Start difference. First operand has 200 places, 234 transitions, 1928 flow. Second operand 58 states and 2538 transitions. [2024-02-02 16:07:42,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 1248 transitions, 10994 flow [2024-02-02 16:07:43,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 1248 transitions, 10791 flow, removed 91 selfloop flow, removed 2 redundant places. [2024-02-02 16:07:43,771 INFO L231 Difference]: Finished difference. Result has 281 places, 522 transitions, 5724 flow [2024-02-02 16:07:43,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=1857, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=5724, PETRI_PLACES=281, PETRI_TRANSITIONS=522} [2024-02-02 16:07:43,771 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 214 predicate places. [2024-02-02 16:07:43,771 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 522 transitions, 5724 flow [2024-02-02 16:07:43,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 35.80769230769231) internal successors, (931), 26 states have internal predecessors, (931), 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) [2024-02-02 16:07:43,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 16:07:43,772 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 16:07:43,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-02-02 16:07:43,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-02 16:07:43,981 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err8ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 35 more)] === [2024-02-02 16:07:43,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 16:07:43,982 INFO L85 PathProgramCache]: Analyzing trace with hash -62680113, now seen corresponding path program 1 times [2024-02-02 16:07:43,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 16:07:43,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068557669] [2024-02-02 16:07:43,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 16:07:43,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 16:07:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 16:07:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-02-02 16:07:44,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 16:07:44,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068557669] [2024-02-02 16:07:44,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068557669] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 16:07:44,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 16:07:44,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-02 16:07:44,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081450327] [2024-02-02 16:07:44,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 16:07:44,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-02 16:07:44,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 16:07:44,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-02 16:07:44,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-02-02 16:07:44,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 69 [2024-02-02 16:07:44,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 522 transitions, 5724 flow. Second operand has 6 states, 6 states have (on average 32.666666666666664) internal successors, (196), 6 states have internal predecessors, (196), 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) [2024-02-02 16:07:44,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 16:07:44,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 69 [2024-02-02 16:07:44,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand