./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longest-2.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_longest-2.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cb09d658 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_longest-2.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack_longest-2.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-cb09d65-m [2024-01-27 23:01:38,172 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 23:01:38,267 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 23:01:38,272 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 23:01:38,273 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 23:01:38,297 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 23:01:38,298 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 23:01:38,298 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 23:01:38,298 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 23:01:38,302 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 23:01:38,302 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 23:01:38,302 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 23:01:38,303 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 23:01:38,304 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 23:01:38,304 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 23:01:38,304 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 23:01:38,304 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 23:01:38,305 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 23:01:38,305 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 23:01:38,305 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 23:01:38,306 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 23:01:38,306 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 23:01:38,307 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 23:01:38,307 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 23:01:38,307 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 23:01:38,307 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 23:01:38,308 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 23:01:38,308 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 23:01:38,308 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 23:01:38,308 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 23:01:38,309 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 23:01:38,309 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 23:01:38,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 23:01:38,310 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 23:01:38,310 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 23:01:38,310 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 23:01:38,310 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 23:01:38,311 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 23:01:38,311 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 23:01:38,311 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 23:01:38,311 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 23:01:38,311 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 23:01:38,312 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 23:01:38,312 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-27 23:01:38,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 23:01:38,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 23:01:38,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 23:01:38,560 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 23:01:38,560 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 23:01:38,561 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2024-01-27 23:01:39,499 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 23:01:39,725 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 23:01:39,725 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2024-01-27 23:01:39,742 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ddac8d04/4cad158ff39c4525b64c9af2d9e39c07/FLAG2b982fa59 [2024-01-27 23:01:39,756 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ddac8d04/4cad158ff39c4525b64c9af2d9e39c07 [2024-01-27 23:01:39,758 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-27 23:01:39,759 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-27 23:01:39,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/stack_longest-2.yml/witness.yml [2024-01-27 23:01:39,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 23:01:39,842 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-27 23:01:39,843 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 23:01:39,843 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 23:01:39,847 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 23:01:39,848 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:01:39" (1/2) ... [2024-01-27 23:01:39,849 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5623ee6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:01:39, skipping insertion in model container [2024-01-27 23:01:39,849 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 11:01:39" (1/2) ... [2024-01-27 23:01:39,851 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@39e71d61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 11:01:39, skipping insertion in model container [2024-01-27 23:01:39,851 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.01 11:01:39" (2/2) ... [2024-01-27 23:01:39,851 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5623ee6d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:39, skipping insertion in model container [2024-01-27 23:01:39,851 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.01 11:01:39" (2/2) ... [2024-01-27 23:01:39,851 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-27 23:01:39,900 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-27 23:01:39,901 INFO L98 nessWitnessExtractor]: Location invariant before [L995-L995] (unsigned long )arg == 0UL [2024-01-27 23:01:39,902 INFO L98 nessWitnessExtractor]: Location invariant before [L995-L995] ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 799) [2024-01-27 23:01:39,902 INFO L98 nessWitnessExtractor]: Location invariant before [L1008-L1012] (((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 6 [2024-01-27 23:01:39,902 INFO L98 nessWitnessExtractor]: Location invariant before [L1008-L1012] (unsigned long )arg == 0UL [2024-01-27 23:01:39,902 INFO L98 nessWitnessExtractor]: Location invariant before [L996-L997] ((((((((((i == 4 || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (0 == i && i == 0)) || (0 == i && i == 0)) || (5 <= i && i <= 799)) || (5 <= i && i <= 799)) || i == 4 [2024-01-27 23:01:39,903 INFO L98 nessWitnessExtractor]: Location invariant after [L996-L997] (unsigned long )arg == 0UL [2024-01-27 23:01:39,903 INFO L98 nessWitnessExtractor]: Location invariant after [L996-L997] ((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 799)) || i == 4 [2024-01-27 23:01:39,903 INFO L98 nessWitnessExtractor]: Location invariant before [L996-L997] (unsigned long )arg == 0UL [2024-01-27 23:01:39,903 INFO L98 nessWitnessExtractor]: Location invariant before [L1015-L1015] i == 800 [2024-01-27 23:01:39,903 INFO L98 nessWitnessExtractor]: Location invariant before [L1015-L1015] (unsigned long )arg == 0UL [2024-01-27 23:01:39,904 INFO L98 nessWitnessExtractor]: Location invariant before [L998-L998] ((((i == 3 || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 799)) || i == 4 [2024-01-27 23:01:39,904 INFO L98 nessWitnessExtractor]: Location invariant before [L998-L998] (unsigned long )arg == 0UL [2024-01-27 23:01:39,904 INFO L98 nessWitnessExtractor]: Location invariant before [L1020-L1020] flag == (_Bool)0 [2024-01-27 23:01:39,904 INFO L98 nessWitnessExtractor]: Loop invariant at [L1005-L1014] (unsigned long )arg == 0UL [2024-01-27 23:01:39,904 INFO L98 nessWitnessExtractor]: Location invariant before [L993-L993] ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 799) [2024-01-27 23:01:39,904 INFO L98 nessWitnessExtractor]: Location invariant before [L993-L993] (unsigned long )arg == 0UL [2024-01-27 23:01:39,904 INFO L98 nessWitnessExtractor]: Location invariant before [L1000-L1000] i == 800 [2024-01-27 23:01:39,905 INFO L98 nessWitnessExtractor]: Location invariant before [L1000-L1000] (unsigned long )arg == 0UL [2024-01-27 23:01:39,905 INFO L98 nessWitnessExtractor]: Location invariant before [L1007-L1007] (unsigned long )arg == 0UL [2024-01-27 23:01:39,905 INFO L98 nessWitnessExtractor]: Location invariant before [L1007-L1007] (((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 6 [2024-01-27 23:01:39,905 INFO L98 nessWitnessExtractor]: Location invariant before [L994-L994] (unsigned long )arg == 0UL [2024-01-27 23:01:39,905 INFO L98 nessWitnessExtractor]: Location invariant before [L994-L994] ((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 799) [2024-01-27 23:01:39,906 INFO L98 nessWitnessExtractor]: Location invariant before [L1021-L1021] flag == (_Bool)0 [2024-01-27 23:01:39,906 INFO L98 nessWitnessExtractor]: Location invariant before [L1010-L1011] (((((((((((((((i == 5 || i == 4) || i == 4) || i == 3) || i == 3) || i == 2) || i == 2) || i == 1) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 7) || i == 6) || i == 6 [2024-01-27 23:01:39,906 INFO L98 nessWitnessExtractor]: Location invariant after [L1010-L1011] (((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 6 [2024-01-27 23:01:39,906 INFO L98 nessWitnessExtractor]: Location invariant after [L1010-L1011] (unsigned long )arg == 0UL [2024-01-27 23:01:39,906 INFO L98 nessWitnessExtractor]: Location invariant before [L1010-L1011] (unsigned long )arg == 0UL [2024-01-27 23:01:39,906 INFO L98 nessWitnessExtractor]: Loop invariant at [L991-L999] (unsigned long )arg == 0UL [2024-01-27 23:01:39,906 INFO L98 nessWitnessExtractor]: Location invariant before [L1013-L1013] (unsigned long )arg == 0UL [2024-01-27 23:01:39,907 INFO L98 nessWitnessExtractor]: Location invariant before [L1013-L1013] (((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (8 <= i && i <= 799)) || (0 == i && i == 0)) || i == 7) || i == 6 [2024-01-27 23:01:39,945 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 23:01:40,299 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_longest-2.i[41530,41543] [2024-01-27 23:01:40,336 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 23:01:40,347 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 23:01:40,386 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_longest-2.i[41530,41543] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-27 23:01:40,471 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 23:01:40,514 INFO L206 MainTranslator]: Completed translation [2024-01-27 23:01:40,515 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:40 WrapperNode [2024-01-27 23:01:40,515 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 23:01:40,516 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 23:01:40,516 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 23:01:40,516 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 23:01:40,521 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 27.01 11:01:40" (1/1) ... [2024-01-27 23:01:40,549 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 27.01 11:01:40" (1/1) ... [2024-01-27 23:01:40,588 INFO L138 Inliner]: procedures = 278, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 188 [2024-01-27 23:01:40,590 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 23:01:40,591 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 23:01:40,591 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 23:01:40,591 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 23:01:40,600 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:40" (1/1) ... [2024-01-27 23:01:40,600 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:40" (1/1) ... [2024-01-27 23:01:40,616 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:40" (1/1) ... [2024-01-27 23:01:40,634 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 5, 2, 3, 2]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0, 0]. The 4 writes are split as follows [0, 0, 1, 2, 1]. [2024-01-27 23:01:40,641 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:40" (1/1) ... [2024-01-27 23:01:40,642 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:40" (1/1) ... [2024-01-27 23:01:40,649 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:40" (1/1) ... [2024-01-27 23:01:40,660 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:40" (1/1) ... [2024-01-27 23:01:40,664 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:40" (1/1) ... [2024-01-27 23:01:40,667 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:40" (1/1) ... [2024-01-27 23:01:40,675 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 23:01:40,676 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 23:01:40,676 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 23:01:40,677 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 23:01:40,677 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:40" (1/1) ... [2024-01-27 23:01:40,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 23:01:40,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:01:40,711 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 23:01:40,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 23:01:40,740 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-27 23:01:40,740 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-27 23:01:40,741 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-27 23:01:40,741 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-27 23:01:40,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 23:01:40,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 23:01:40,741 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-27 23:01:40,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 23:01:40,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 23:01:40,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 23:01:40,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 23:01:40,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 23:01:40,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 23:01:40,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 23:01:40,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 23:01:40,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 23:01:40,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 23:01:40,743 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-27 23:01:40,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 23:01:40,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 23:01:40,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 23:01:40,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 23:01:40,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 23:01:40,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 23:01:40,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 23:01:40,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 23:01:40,746 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 23:01:40,894 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 23:01:40,896 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 23:01:41,209 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 23:01:41,210 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 23:01:41,317 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 23:01:41,317 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-27 23:01:41,318 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:01:41 BoogieIcfgContainer [2024-01-27 23:01:41,318 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 23:01:41,319 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 23:01:41,319 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 23:01:41,322 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 23:01:41,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 11:01:39" (1/4) ... [2024-01-27 23:01:41,322 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c885073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 11:01:41, skipping insertion in model container [2024-01-27 23:01:41,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.01 11:01:39" (2/4) ... [2024-01-27 23:01:41,323 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c885073 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.01 11:01:41, skipping insertion in model container [2024-01-27 23:01:41,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.01 11:01:40" (3/4) ... [2024-01-27 23:01:41,323 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c885073 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.01 11:01:41, skipping insertion in model container [2024-01-27 23:01:41,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 11:01:41" (4/4) ... [2024-01-27 23:01:41,324 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2024-01-27 23:01:41,336 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 23:01:41,336 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-01-27 23:01:41,336 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 23:01:41,414 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 23:01:41,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 99 transitions, 212 flow [2024-01-27 23:01:41,465 INFO L124 PetriNetUnfolderBase]: 5/97 cut-off events. [2024-01-27 23:01:41,465 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 23:01:41,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 97 events. 5/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 314 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2024-01-27 23:01:41,469 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 99 transitions, 212 flow [2024-01-27 23:01:41,472 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 97 places, 95 transitions, 199 flow [2024-01-27 23:01:41,479 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 23:01:41,490 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;@1ff3d147, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 23:01:41,490 INFO L358 AbstractCegarLoop]: Starting to check reachability of 68 error locations. [2024-01-27 23:01:41,493 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 23:01:41,493 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-27 23:01:41,493 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 23:01:41,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:41,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-27 23:01:41,494 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:41,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:41,499 INFO L85 PathProgramCache]: Analyzing trace with hash 15795, now seen corresponding path program 1 times [2024-01-27 23:01:41,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:41,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155272657] [2024-01-27 23:01:41,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:41,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:41,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:41,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155272657] [2024-01-27 23:01:41,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155272657] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:41,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:41,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-27 23:01:41,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455367352] [2024-01-27 23:01:41,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:41,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 23:01:41,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:41,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 23:01:41,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 23:01:41,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-27 23:01:41,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 95 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:41,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:41,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-27 23:01:41,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:42,040 INFO L124 PetriNetUnfolderBase]: 470/1557 cut-off events. [2024-01-27 23:01:42,041 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-01-27 23:01:42,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2337 conditions, 1557 events. 470/1557 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 11594 event pairs, 357 based on Foata normal form. 48/1127 useless extension candidates. Maximal degree in co-relation 2193. Up to 740 conditions per place. [2024-01-27 23:01:42,054 INFO L140 encePairwiseOnDemand]: 94/99 looper letters, 28 selfloop transitions, 1 changer transitions 0/91 dead transitions. [2024-01-27 23:01:42,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 91 transitions, 249 flow [2024-01-27 23:01:42,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 23:01:42,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 23:01:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2024-01-27 23:01:42,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7575757575757576 [2024-01-27 23:01:42,068 INFO L175 Difference]: Start difference. First operand has 97 places, 95 transitions, 199 flow. Second operand 3 states and 225 transitions. [2024-01-27 23:01:42,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 91 transitions, 249 flow [2024-01-27 23:01:42,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 91 transitions, 244 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-27 23:01:42,077 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 188 flow [2024-01-27 23:01:42,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2024-01-27 23:01:42,081 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -3 predicate places. [2024-01-27 23:01:42,081 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 188 flow [2024-01-27 23:01:42,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:42,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:42,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-27 23:01:42,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 23:01:42,083 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:42,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:42,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1716767669, now seen corresponding path program 1 times [2024-01-27 23:01:42,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:42,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953100078] [2024-01-27 23:01:42,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:42,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:42,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:42,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953100078] [2024-01-27 23:01:42,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953100078] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:42,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:42,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 23:01:42,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717854969] [2024-01-27 23:01:42,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:42,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 23:01:42,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:42,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 23:01:42,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 23:01:42,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 99 [2024-01-27 23:01:42,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:42,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:42,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 99 [2024-01-27 23:01:42,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:42,418 INFO L124 PetriNetUnfolderBase]: 472/1576 cut-off events. [2024-01-27 23:01:42,419 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-01-27 23:01:42,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2346 conditions, 1576 events. 472/1576 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 11670 event pairs, 185 based on Foata normal form. 164/1357 useless extension candidates. Maximal degree in co-relation 2340. Up to 704 conditions per place. [2024-01-27 23:01:42,427 INFO L140 encePairwiseOnDemand]: 88/99 looper letters, 39 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2024-01-27 23:01:42,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 94 transitions, 278 flow [2024-01-27 23:01:42,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 23:01:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 23:01:42,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 278 transitions. [2024-01-27 23:01:42,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.702020202020202 [2024-01-27 23:01:42,429 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 188 flow. Second operand 4 states and 278 transitions. [2024-01-27 23:01:42,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 94 transitions, 278 flow [2024-01-27 23:01:42,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 94 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 23:01:42,431 INFO L231 Difference]: Finished difference. Result has 87 places, 82 transitions, 173 flow [2024-01-27 23:01:42,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=87, PETRI_TRANSITIONS=82} [2024-01-27 23:01:42,432 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -10 predicate places. [2024-01-27 23:01:42,432 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 82 transitions, 173 flow [2024-01-27 23:01:42,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 4 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:42,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:42,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:42,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 23:01:42,433 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:42,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:42,433 INFO L85 PathProgramCache]: Analyzing trace with hash 546357003, now seen corresponding path program 1 times [2024-01-27 23:01:42,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:42,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841671295] [2024-01-27 23:01:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:42,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:42,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:42,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841671295] [2024-01-27 23:01:42,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841671295] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:42,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:42,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 23:01:42,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533626382] [2024-01-27 23:01:42,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:42,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 23:01:42,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:42,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 23:01:42,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 23:01:42,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 99 [2024-01-27 23:01:42,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 82 transitions, 173 flow. Second operand has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:42,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:42,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 99 [2024-01-27 23:01:42,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:42,737 INFO L124 PetriNetUnfolderBase]: 452/1350 cut-off events. [2024-01-27 23:01:42,737 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-01-27 23:01:42,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2088 conditions, 1350 events. 452/1350 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9465 event pairs, 18 based on Foata normal form. 208/1352 useless extension candidates. Maximal degree in co-relation 2082. Up to 594 conditions per place. [2024-01-27 23:01:42,744 INFO L140 encePairwiseOnDemand]: 89/99 looper letters, 52 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2024-01-27 23:01:42,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 99 transitions, 320 flow [2024-01-27 23:01:42,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 23:01:42,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 23:01:42,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 294 transitions. [2024-01-27 23:01:42,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7424242424242424 [2024-01-27 23:01:42,747 INFO L175 Difference]: Start difference. First operand has 87 places, 82 transitions, 173 flow. Second operand 4 states and 294 transitions. [2024-01-27 23:01:42,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 99 transitions, 320 flow [2024-01-27 23:01:42,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 99 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 23:01:42,750 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 158 flow [2024-01-27 23:01:42,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2024-01-27 23:01:42,751 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -17 predicate places. [2024-01-27 23:01:42,751 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 158 flow [2024-01-27 23:01:42,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:42,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:42,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:42,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 23:01:42,752 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:42,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:42,753 INFO L85 PathProgramCache]: Analyzing trace with hash -244390318, now seen corresponding path program 1 times [2024-01-27 23:01:42,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:42,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59600463] [2024-01-27 23:01:42,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:42,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:42,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:42,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59600463] [2024-01-27 23:01:42,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59600463] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:42,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:42,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 23:01:42,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594531392] [2024-01-27 23:01:42,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:42,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 23:01:42,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:42,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 23:01:42,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 23:01:42,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 99 [2024-01-27 23:01:42,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 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) [2024-01-27 23:01:42,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:42,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 99 [2024-01-27 23:01:42,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:43,017 INFO L124 PetriNetUnfolderBase]: 902/2308 cut-off events. [2024-01-27 23:01:43,017 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-01-27 23:01:43,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3915 conditions, 2308 events. 902/2308 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 16072 event pairs, 539 based on Foata normal form. 124/2071 useless extension candidates. Maximal degree in co-relation 3909. Up to 1000 conditions per place. [2024-01-27 23:01:43,028 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 53 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2024-01-27 23:01:43,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 94 transitions, 314 flow [2024-01-27 23:01:43,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 23:01:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 23:01:43,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2024-01-27 23:01:43,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8148148148148148 [2024-01-27 23:01:43,030 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 158 flow. Second operand 3 states and 242 transitions. [2024-01-27 23:01:43,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 94 transitions, 314 flow [2024-01-27 23:01:43,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 94 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 23:01:43,032 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 179 flow [2024-01-27 23:01:43,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2024-01-27 23:01:43,034 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -16 predicate places. [2024-01-27 23:01:43,035 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 179 flow [2024-01-27 23:01:43,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 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) [2024-01-27 23:01:43,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:43,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:43,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 23:01:43,038 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:43,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:43,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1063088654, now seen corresponding path program 1 times [2024-01-27 23:01:43,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:43,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802675681] [2024-01-27 23:01:43,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:43,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:43,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:43,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802675681] [2024-01-27 23:01:43,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802675681] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:43,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:43,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 23:01:43,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698923609] [2024-01-27 23:01:43,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:43,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 23:01:43,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:43,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 23:01:43,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 23:01:43,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 99 [2024-01-27 23:01:43,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:43,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:43,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 99 [2024-01-27 23:01:43,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:43,378 INFO L124 PetriNetUnfolderBase]: 1333/3627 cut-off events. [2024-01-27 23:01:43,378 INFO L125 PetriNetUnfolderBase]: For 211/221 co-relation queries the response was YES. [2024-01-27 23:01:43,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6235 conditions, 3627 events. 1333/3627 cut-off events. For 211/221 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 28719 event pairs, 795 based on Foata normal form. 200/3469 useless extension candidates. Maximal degree in co-relation 6228. Up to 1535 conditions per place. [2024-01-27 23:01:43,395 INFO L140 encePairwiseOnDemand]: 91/99 looper letters, 54 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2024-01-27 23:01:43,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 96 transitions, 345 flow [2024-01-27 23:01:43,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 23:01:43,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 23:01:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2024-01-27 23:01:43,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2024-01-27 23:01:43,396 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 179 flow. Second operand 3 states and 243 transitions. [2024-01-27 23:01:43,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 96 transitions, 345 flow [2024-01-27 23:01:43,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 96 transitions, 341 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 23:01:43,402 INFO L231 Difference]: Finished difference. Result has 83 places, 76 transitions, 199 flow [2024-01-27 23:01:43,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=83, PETRI_TRANSITIONS=76} [2024-01-27 23:01:43,403 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -14 predicate places. [2024-01-27 23:01:43,404 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 76 transitions, 199 flow [2024-01-27 23:01:43,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:43,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:43,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:43,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 23:01:43,404 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:43,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:43,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1688337316, now seen corresponding path program 1 times [2024-01-27 23:01:43,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:43,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127621832] [2024-01-27 23:01:43,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:43,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:43,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:43,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:43,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127621832] [2024-01-27 23:01:43,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127621832] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:43,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:43,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 23:01:43,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964979680] [2024-01-27 23:01:43,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:43,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 23:01:43,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:43,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 23:01:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 23:01:43,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 99 [2024-01-27 23:01:43,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:43,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:43,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 99 [2024-01-27 23:01:43,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:43,733 INFO L124 PetriNetUnfolderBase]: 925/2718 cut-off events. [2024-01-27 23:01:43,733 INFO L125 PetriNetUnfolderBase]: For 253/279 co-relation queries the response was YES. [2024-01-27 23:01:43,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4919 conditions, 2718 events. 925/2718 cut-off events. For 253/279 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 20513 event pairs, 116 based on Foata normal form. 20/2637 useless extension candidates. Maximal degree in co-relation 4911. Up to 1225 conditions per place. [2024-01-27 23:01:43,748 INFO L140 encePairwiseOnDemand]: 94/99 looper letters, 58 selfloop transitions, 3 changer transitions 0/105 dead transitions. [2024-01-27 23:01:43,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 105 transitions, 405 flow [2024-01-27 23:01:43,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 23:01:43,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 23:01:43,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 319 transitions. [2024-01-27 23:01:43,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8055555555555556 [2024-01-27 23:01:43,749 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 199 flow. Second operand 4 states and 319 transitions. [2024-01-27 23:01:43,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 105 transitions, 405 flow [2024-01-27 23:01:43,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 105 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 23:01:43,752 INFO L231 Difference]: Finished difference. Result has 87 places, 78 transitions, 219 flow [2024-01-27 23:01:43,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=87, PETRI_TRANSITIONS=78} [2024-01-27 23:01:43,753 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -10 predicate places. [2024-01-27 23:01:43,753 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 78 transitions, 219 flow [2024-01-27 23:01:43,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:43,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:43,754 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:43,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 23:01:43,754 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:43,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:43,755 INFO L85 PathProgramCache]: Analyzing trace with hash -432232040, now seen corresponding path program 1 times [2024-01-27 23:01:43,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:43,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534258005] [2024-01-27 23:01:43,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:43,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:43,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:43,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:43,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534258005] [2024-01-27 23:01:43,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534258005] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:01:43,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551062928] [2024-01-27 23:01:43,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:43,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:43,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:01:43,857 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) [2024-01-27 23:01:43,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 23:01:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:43,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 23:01:43,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:01:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:44,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:01:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:44,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551062928] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:01:44,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:01:44,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2024-01-27 23:01:44,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770957509] [2024-01-27 23:01:44,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:01:44,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 23:01:44,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:44,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 23:01:44,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-27 23:01:44,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 99 [2024-01-27 23:01:44,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 78 transitions, 219 flow. Second operand has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:44,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:44,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 99 [2024-01-27 23:01:44,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:44,526 INFO L124 PetriNetUnfolderBase]: 2019/4759 cut-off events. [2024-01-27 23:01:44,527 INFO L125 PetriNetUnfolderBase]: For 1008/1054 co-relation queries the response was YES. [2024-01-27 23:01:44,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9333 conditions, 4759 events. 2019/4759 cut-off events. For 1008/1054 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 34554 event pairs, 361 based on Foata normal form. 416/4968 useless extension candidates. Maximal degree in co-relation 9322. Up to 974 conditions per place. [2024-01-27 23:01:44,553 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 123 selfloop transitions, 5 changer transitions 0/163 dead transitions. [2024-01-27 23:01:44,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 163 transitions, 729 flow [2024-01-27 23:01:44,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 23:01:44,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 23:01:44,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 461 transitions. [2024-01-27 23:01:44,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7760942760942761 [2024-01-27 23:01:44,555 INFO L175 Difference]: Start difference. First operand has 87 places, 78 transitions, 219 flow. Second operand 6 states and 461 transitions. [2024-01-27 23:01:44,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 163 transitions, 729 flow [2024-01-27 23:01:44,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 163 transitions, 723 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 23:01:44,560 INFO L231 Difference]: Finished difference. Result has 89 places, 75 transitions, 226 flow [2024-01-27 23:01:44,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=226, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2024-01-27 23:01:44,560 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -8 predicate places. [2024-01-27 23:01:44,561 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 226 flow [2024-01-27 23:01:44,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:44,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:44,561 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1] [2024-01-27 23:01:44,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 23:01:44,772 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 [2024-01-27 23:01:44,772 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:44,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:44,773 INFO L85 PathProgramCache]: Analyzing trace with hash 539710309, now seen corresponding path program 1 times [2024-01-27 23:01:44,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:44,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081110620] [2024-01-27 23:01:44,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:44,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:44,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:44,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081110620] [2024-01-27 23:01:44,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081110620] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:01:44,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584418803] [2024-01-27 23:01:44,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:44,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:44,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:01:44,899 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) [2024-01-27 23:01:44,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 23:01:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:44,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 23:01:44,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:01:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:45,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:01:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:45,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584418803] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:01:45,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:01:45,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2024-01-27 23:01:45,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388011525] [2024-01-27 23:01:45,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:01:45,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 23:01:45,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:45,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 23:01:45,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-27 23:01:45,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 99 [2024-01-27 23:01:45,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 75 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 57.833333333333336) internal successors, (347), 6 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:45,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:45,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 99 [2024-01-27 23:01:45,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:45,692 INFO L124 PetriNetUnfolderBase]: 2968/6581 cut-off events. [2024-01-27 23:01:45,693 INFO L125 PetriNetUnfolderBase]: For 3211/3211 co-relation queries the response was YES. [2024-01-27 23:01:45,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13623 conditions, 6581 events. 2968/6581 cut-off events. For 3211/3211 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 47184 event pairs, 360 based on Foata normal form. 644/6821 useless extension candidates. Maximal degree in co-relation 13609. Up to 1676 conditions per place. [2024-01-27 23:01:45,723 INFO L140 encePairwiseOnDemand]: 89/99 looper letters, 113 selfloop transitions, 5 changer transitions 0/147 dead transitions. [2024-01-27 23:01:45,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 147 transitions, 722 flow [2024-01-27 23:01:45,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 23:01:45,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 23:01:45,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 446 transitions. [2024-01-27 23:01:45,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7508417508417509 [2024-01-27 23:01:45,724 INFO L175 Difference]: Start difference. First operand has 89 places, 75 transitions, 226 flow. Second operand 6 states and 446 transitions. [2024-01-27 23:01:45,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 147 transitions, 722 flow [2024-01-27 23:01:45,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 147 transitions, 687 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-01-27 23:01:45,729 INFO L231 Difference]: Finished difference. Result has 89 places, 71 transitions, 224 flow [2024-01-27 23:01:45,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=224, PETRI_PLACES=89, PETRI_TRANSITIONS=71} [2024-01-27 23:01:45,730 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -8 predicate places. [2024-01-27 23:01:45,730 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 71 transitions, 224 flow [2024-01-27 23:01:45,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.833333333333336) internal successors, (347), 6 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:45,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:45,731 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, 1, 1, 1] [2024-01-27 23:01:45,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 23:01:45,944 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 [2024-01-27 23:01:45,945 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:45,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:45,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1974566636, now seen corresponding path program 1 times [2024-01-27 23:01:45,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:45,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355302200] [2024-01-27 23:01:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:45,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:46,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:46,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355302200] [2024-01-27 23:01:46,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355302200] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:46,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:46,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 23:01:46,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416171774] [2024-01-27 23:01:46,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:46,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 23:01:46,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:46,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 23:01:46,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 23:01:46,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 99 [2024-01-27 23:01:46,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 71 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:46,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:46,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 99 [2024-01-27 23:01:46,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:46,303 INFO L124 PetriNetUnfolderBase]: 1055/3418 cut-off events. [2024-01-27 23:01:46,303 INFO L125 PetriNetUnfolderBase]: For 2109/2109 co-relation queries the response was YES. [2024-01-27 23:01:46,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6887 conditions, 3418 events. 1055/3418 cut-off events. For 2109/2109 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 22159 event pairs, 297 based on Foata normal form. 168/3465 useless extension candidates. Maximal degree in co-relation 6870. Up to 1280 conditions per place. [2024-01-27 23:01:46,320 INFO L140 encePairwiseOnDemand]: 95/99 looper letters, 48 selfloop transitions, 4 changer transitions 0/88 dead transitions. [2024-01-27 23:01:46,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 88 transitions, 414 flow [2024-01-27 23:01:46,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 23:01:46,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 23:01:46,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2024-01-27 23:01:46,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8148148148148148 [2024-01-27 23:01:46,322 INFO L175 Difference]: Start difference. First operand has 89 places, 71 transitions, 224 flow. Second operand 3 states and 242 transitions. [2024-01-27 23:01:46,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 88 transitions, 414 flow [2024-01-27 23:01:46,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 88 transitions, 400 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-01-27 23:01:46,325 INFO L231 Difference]: Finished difference. Result has 89 places, 71 transitions, 225 flow [2024-01-27 23:01:46,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=89, PETRI_TRANSITIONS=71} [2024-01-27 23:01:46,326 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, -8 predicate places. [2024-01-27 23:01:46,326 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 71 transitions, 225 flow [2024-01-27 23:01:46,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:46,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:46,326 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2024-01-27 23:01:46,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-27 23:01:46,327 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:46,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:46,327 INFO L85 PathProgramCache]: Analyzing trace with hash -63998545, now seen corresponding path program 1 times [2024-01-27 23:01:46,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:46,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521035247] [2024-01-27 23:01:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:46,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:46,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:46,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521035247] [2024-01-27 23:01:46,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521035247] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:01:46,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792666721] [2024-01-27 23:01:46,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:46,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:46,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:01:46,496 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) [2024-01-27 23:01:46,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 23:01:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:46,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-27 23:01:46,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:01:46,646 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 [2024-01-27 23:01:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:46,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:01:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:46,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792666721] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:01:46,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:01:46,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-01-27 23:01:46,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331168733] [2024-01-27 23:01:46,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:01:46,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 23:01:46,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:46,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 23:01:46,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-01-27 23:01:46,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-27 23:01:46,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 71 transitions, 225 flow. Second operand has 10 states, 10 states have (on average 68.5) internal successors, (685), 10 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:46,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:46,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-27 23:01:46,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:47,816 INFO L124 PetriNetUnfolderBase]: 3059/9172 cut-off events. [2024-01-27 23:01:47,816 INFO L125 PetriNetUnfolderBase]: For 6198/6198 co-relation queries the response was YES. [2024-01-27 23:01:47,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19782 conditions, 9172 events. 3059/9172 cut-off events. For 6198/6198 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 79042 event pairs, 591 based on Foata normal form. 58/9023 useless extension candidates. Maximal degree in co-relation 19765. Up to 1119 conditions per place. [2024-01-27 23:01:47,856 INFO L140 encePairwiseOnDemand]: 92/99 looper letters, 186 selfloop transitions, 19 changer transitions 0/239 dead transitions. [2024-01-27 23:01:47,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 239 transitions, 1330 flow [2024-01-27 23:01:47,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 23:01:47,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 23:01:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 948 transitions. [2024-01-27 23:01:47,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.797979797979798 [2024-01-27 23:01:47,859 INFO L175 Difference]: Start difference. First operand has 89 places, 71 transitions, 225 flow. Second operand 12 states and 948 transitions. [2024-01-27 23:01:47,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 239 transitions, 1330 flow [2024-01-27 23:01:47,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 239 transitions, 1308 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 23:01:47,868 INFO L231 Difference]: Finished difference. Result has 105 places, 89 transitions, 355 flow [2024-01-27 23:01:47,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=355, PETRI_PLACES=105, PETRI_TRANSITIONS=89} [2024-01-27 23:01:47,868 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 8 predicate places. [2024-01-27 23:01:47,869 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 89 transitions, 355 flow [2024-01-27 23:01:47,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 68.5) internal successors, (685), 10 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:47,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:47,869 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:47,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 23:01:48,080 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 [2024-01-27 23:01:48,080 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:48,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:48,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1874444233, now seen corresponding path program 1 times [2024-01-27 23:01:48,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:48,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51539916] [2024-01-27 23:01:48,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:48,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:48,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:48,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51539916] [2024-01-27 23:01:48,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51539916] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:48,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:48,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 23:01:48,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548836318] [2024-01-27 23:01:48,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:48,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 23:01:48,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:48,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 23:01:48,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-01-27 23:01:48,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-27 23:01:48,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 89 transitions, 355 flow. Second operand has 7 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:48,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:48,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-27 23:01:48,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:49,555 INFO L124 PetriNetUnfolderBase]: 3037/9153 cut-off events. [2024-01-27 23:01:49,556 INFO L125 PetriNetUnfolderBase]: For 8591/8591 co-relation queries the response was YES. [2024-01-27 23:01:49,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20646 conditions, 9153 events. 3037/9153 cut-off events. For 8591/8591 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 79284 event pairs, 1051 based on Foata normal form. 0/8920 useless extension candidates. Maximal degree in co-relation 20621. Up to 4193 conditions per place. [2024-01-27 23:01:49,596 INFO L140 encePairwiseOnDemand]: 92/99 looper letters, 97 selfloop transitions, 9 changer transitions 0/140 dead transitions. [2024-01-27 23:01:49,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 140 transitions, 786 flow [2024-01-27 23:01:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 23:01:49,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 23:01:49,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 525 transitions. [2024-01-27 23:01:49,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7575757575757576 [2024-01-27 23:01:49,598 INFO L175 Difference]: Start difference. First operand has 105 places, 89 transitions, 355 flow. Second operand 7 states and 525 transitions. [2024-01-27 23:01:49,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 140 transitions, 786 flow [2024-01-27 23:01:49,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 140 transitions, 770 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-01-27 23:01:49,611 INFO L231 Difference]: Finished difference. Result has 114 places, 96 transitions, 425 flow [2024-01-27 23:01:49,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=425, PETRI_PLACES=114, PETRI_TRANSITIONS=96} [2024-01-27 23:01:49,612 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 17 predicate places. [2024-01-27 23:01:49,612 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 96 transitions, 425 flow [2024-01-27 23:01:49,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:49,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:49,613 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:49,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-27 23:01:49,613 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err14ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:49,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:49,614 INFO L85 PathProgramCache]: Analyzing trace with hash -384356354, now seen corresponding path program 1 times [2024-01-27 23:01:49,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:49,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229493620] [2024-01-27 23:01:49,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:49,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 23:01:49,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:49,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229493620] [2024-01-27 23:01:49,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229493620] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:49,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:49,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 23:01:49,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640013575] [2024-01-27 23:01:49,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:49,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 23:01:49,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:49,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 23:01:49,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 23:01:49,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 99 [2024-01-27 23:01:49,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 96 transitions, 425 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:49,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:49,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 99 [2024-01-27 23:01:49,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:50,863 INFO L124 PetriNetUnfolderBase]: 4585/12078 cut-off events. [2024-01-27 23:01:50,863 INFO L125 PetriNetUnfolderBase]: For 11535/11547 co-relation queries the response was YES. [2024-01-27 23:01:50,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28332 conditions, 12078 events. 4585/12078 cut-off events. For 11535/11547 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 103208 event pairs, 1572 based on Foata normal form. 0/11888 useless extension candidates. Maximal degree in co-relation 28302. Up to 5390 conditions per place. [2024-01-27 23:01:50,941 INFO L140 encePairwiseOnDemand]: 94/99 looper letters, 137 selfloop transitions, 7 changer transitions 3/183 dead transitions. [2024-01-27 23:01:50,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 183 transitions, 1235 flow [2024-01-27 23:01:50,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 23:01:50,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 23:01:50,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 378 transitions. [2024-01-27 23:01:50,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7636363636363637 [2024-01-27 23:01:50,943 INFO L175 Difference]: Start difference. First operand has 114 places, 96 transitions, 425 flow. Second operand 5 states and 378 transitions. [2024-01-27 23:01:50,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 183 transitions, 1235 flow [2024-01-27 23:01:50,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 183 transitions, 1214 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-01-27 23:01:50,964 INFO L231 Difference]: Finished difference. Result has 117 places, 96 transitions, 441 flow [2024-01-27 23:01:50,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=441, PETRI_PLACES=117, PETRI_TRANSITIONS=96} [2024-01-27 23:01:50,965 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 20 predicate places. [2024-01-27 23:01:50,965 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 96 transitions, 441 flow [2024-01-27 23:01:50,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:50,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:50,966 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, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:50,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-27 23:01:50,966 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:50,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:50,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1528751736, now seen corresponding path program 1 times [2024-01-27 23:01:50,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:50,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162024277] [2024-01-27 23:01:50,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:50,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-01-27 23:01:51,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:51,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162024277] [2024-01-27 23:01:51,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162024277] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:51,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:51,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-27 23:01:51,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487892896] [2024-01-27 23:01:51,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:51,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 23:01:51,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:51,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 23:01:51,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-01-27 23:01:51,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-27 23:01:51,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 96 transitions, 441 flow. Second operand has 7 states, 7 states have (on average 67.28571428571429) internal successors, (471), 7 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:51,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:51,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-27 23:01:51,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:52,926 INFO L124 PetriNetUnfolderBase]: 3503/10191 cut-off events. [2024-01-27 23:01:52,926 INFO L125 PetriNetUnfolderBase]: For 16841/16841 co-relation queries the response was YES. [2024-01-27 23:01:52,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25718 conditions, 10191 events. 3503/10191 cut-off events. For 16841/16841 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 88223 event pairs, 733 based on Foata normal form. 0/9983 useless extension candidates. Maximal degree in co-relation 25687. Up to 3584 conditions per place. [2024-01-27 23:01:52,989 INFO L140 encePairwiseOnDemand]: 89/99 looper letters, 110 selfloop transitions, 21 changer transitions 0/165 dead transitions. [2024-01-27 23:01:52,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 165 transitions, 1079 flow [2024-01-27 23:01:52,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 23:01:52,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 23:01:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 597 transitions. [2024-01-27 23:01:52,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7537878787878788 [2024-01-27 23:01:52,991 INFO L175 Difference]: Start difference. First operand has 117 places, 96 transitions, 441 flow. Second operand 8 states and 597 transitions. [2024-01-27 23:01:52,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 165 transitions, 1079 flow [2024-01-27 23:01:53,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 165 transitions, 1041 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-01-27 23:01:53,016 INFO L231 Difference]: Finished difference. Result has 126 places, 107 transitions, 592 flow [2024-01-27 23:01:53,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=592, PETRI_PLACES=126, PETRI_TRANSITIONS=107} [2024-01-27 23:01:53,020 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 29 predicate places. [2024-01-27 23:01:53,020 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 107 transitions, 592 flow [2024-01-27 23:01:53,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 67.28571428571429) internal successors, (471), 7 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:53,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:53,021 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:01:53,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-27 23:01:53,022 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err16ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:53,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:53,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1330494022, now seen corresponding path program 1 times [2024-01-27 23:01:53,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:53,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769460978] [2024-01-27 23:01:53,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:53,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-01-27 23:01:53,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:53,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769460978] [2024-01-27 23:01:53,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769460978] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 23:01:53,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 23:01:53,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 23:01:53,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634128774] [2024-01-27 23:01:53,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 23:01:53,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 23:01:53,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:53,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 23:01:53,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 23:01:53,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 99 [2024-01-27 23:01:53,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 107 transitions, 592 flow. Second operand has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:53,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:53,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 99 [2024-01-27 23:01:53,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:01:54,307 INFO L124 PetriNetUnfolderBase]: 4883/12016 cut-off events. [2024-01-27 23:01:54,307 INFO L125 PetriNetUnfolderBase]: For 18845/18867 co-relation queries the response was YES. [2024-01-27 23:01:54,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32490 conditions, 12016 events. 4883/12016 cut-off events. For 18845/18867 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 97661 event pairs, 1496 based on Foata normal form. 12/11871 useless extension candidates. Maximal degree in co-relation 32454. Up to 6153 conditions per place. [2024-01-27 23:01:54,397 INFO L140 encePairwiseOnDemand]: 94/99 looper letters, 113 selfloop transitions, 7 changer transitions 2/158 dead transitions. [2024-01-27 23:01:54,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 158 transitions, 1139 flow [2024-01-27 23:01:54,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 23:01:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 23:01:54,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 365 transitions. [2024-01-27 23:01:54,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7373737373737373 [2024-01-27 23:01:54,399 INFO L175 Difference]: Start difference. First operand has 126 places, 107 transitions, 592 flow. Second operand 5 states and 365 transitions. [2024-01-27 23:01:54,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 158 transitions, 1139 flow [2024-01-27 23:01:54,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 158 transitions, 1113 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-01-27 23:01:54,438 INFO L231 Difference]: Finished difference. Result has 130 places, 107 transitions, 598 flow [2024-01-27 23:01:54,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=598, PETRI_PLACES=130, PETRI_TRANSITIONS=107} [2024-01-27 23:01:54,439 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 33 predicate places. [2024-01-27 23:01:54,439 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 107 transitions, 598 flow [2024-01-27 23:01:54,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:54,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:01:54,440 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2024-01-27 23:01:54,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-27 23:01:54,440 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:01:54,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:01:54,440 INFO L85 PathProgramCache]: Analyzing trace with hash -797387385, now seen corresponding path program 1 times [2024-01-27 23:01:54,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:01:54,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685452604] [2024-01-27 23:01:54,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:54,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:01:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:55,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:01:55,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685452604] [2024-01-27 23:01:55,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685452604] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:01:55,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657006534] [2024-01-27 23:01:55,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:01:55,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:01:55,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:01:55,648 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) [2024-01-27 23:01:55,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 23:01:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:01:55,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 16 conjunts are in the unsatisfiable core [2024-01-27 23:01:55,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:01:55,836 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 [2024-01-27 23:01:56,019 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 [2024-01-27 23:01:56,309 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 [2024-01-27 23:01:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:56,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:01:57,031 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 23:01:57,031 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 [2024-01-27 23:01:57,063 INFO L349 Elim1Store]: treesize reduction 8, result has 70.4 percent of original size [2024-01-27 23:01:57,064 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 76 treesize of output 71 [2024-01-27 23:01:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:01:57,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657006534] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:01:57,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:01:57,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2024-01-27 23:01:57,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783878919] [2024-01-27 23:01:57,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:01:57,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 23:01:57,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:01:57,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 23:01:57,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2024-01-27 23:01:57,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-27 23:01:57,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 107 transitions, 598 flow. Second operand has 25 states, 25 states have (on average 67.72) internal successors, (1693), 25 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:01:57,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:01:57,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-27 23:01:57,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:02:04,435 INFO L124 PetriNetUnfolderBase]: 9637/27887 cut-off events. [2024-01-27 23:02:04,435 INFO L125 PetriNetUnfolderBase]: For 61825/61825 co-relation queries the response was YES. [2024-01-27 23:02:04,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76204 conditions, 27887 events. 9637/27887 cut-off events. For 61825/61825 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 272870 event pairs, 1125 based on Foata normal form. 130/27791 useless extension candidates. Maximal degree in co-relation 76166. Up to 3284 conditions per place. [2024-01-27 23:02:04,633 INFO L140 encePairwiseOnDemand]: 90/99 looper letters, 611 selfloop transitions, 133 changer transitions 71/849 dead transitions. [2024-01-27 23:02:04,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 849 transitions, 6466 flow [2024-01-27 23:02:04,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-01-27 23:02:04,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2024-01-27 23:02:04,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4647 transitions. [2024-01-27 23:02:04,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7570869990224829 [2024-01-27 23:02:04,646 INFO L175 Difference]: Start difference. First operand has 130 places, 107 transitions, 598 flow. Second operand 62 states and 4647 transitions. [2024-01-27 23:02:04,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 849 transitions, 6466 flow [2024-01-27 23:02:04,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 849 transitions, 6335 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-01-27 23:02:04,783 INFO L231 Difference]: Finished difference. Result has 202 places, 235 transitions, 1919 flow [2024-01-27 23:02:04,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=1919, PETRI_PLACES=202, PETRI_TRANSITIONS=235} [2024-01-27 23:02:04,785 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 105 predicate places. [2024-01-27 23:02:04,785 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 235 transitions, 1919 flow [2024-01-27 23:02:04,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 67.72) internal successors, (1693), 25 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:02:04,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:02:04,787 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:02:04,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 23:02:05,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 23:02:05,000 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:02:05,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:02:05,000 INFO L85 PathProgramCache]: Analyzing trace with hash -432873443, now seen corresponding path program 1 times [2024-01-27 23:02:05,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:02:05,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336830806] [2024-01-27 23:02:05,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:02:05,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:02:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:02:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-01-27 23:02:05,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:02:05,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336830806] [2024-01-27 23:02:05,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336830806] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:02:05,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3858103] [2024-01-27 23:02:05,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:02:05,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:02:05,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:02:05,240 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) [2024-01-27 23:02:05,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 23:02:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:02:05,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 23:02:05,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:02:05,395 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 [2024-01-27 23:02:05,473 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 [2024-01-27 23:02:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:02:05,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:02:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-01-27 23:02:05,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3858103] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:02:05,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:02:05,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 14 [2024-01-27 23:02:05,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641548798] [2024-01-27 23:02:05,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:02:05,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 23:02:05,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:02:05,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 23:02:05,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-01-27 23:02:05,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-27 23:02:05,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 235 transitions, 1919 flow. Second operand has 14 states, 14 states have (on average 70.28571428571429) internal successors, (984), 14 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:02:05,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:02:05,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-27 23:02:05,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:02:13,295 INFO L124 PetriNetUnfolderBase]: 13593/39582 cut-off events. [2024-01-27 23:02:13,295 INFO L125 PetriNetUnfolderBase]: For 109511/109511 co-relation queries the response was YES. [2024-01-27 23:02:13,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113521 conditions, 39582 events. 13593/39582 cut-off events. For 109511/109511 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 394675 event pairs, 2157 based on Foata normal form. 200/39445 useless extension candidates. Maximal degree in co-relation 113469. Up to 4592 conditions per place. [2024-01-27 23:02:13,896 INFO L140 encePairwiseOnDemand]: 92/99 looper letters, 444 selfloop transitions, 148 changer transitions 23/649 dead transitions. [2024-01-27 23:02:13,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 649 transitions, 5972 flow [2024-01-27 23:02:13,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 23:02:13,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 23:02:13,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1878 transitions. [2024-01-27 23:02:13,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7904040404040404 [2024-01-27 23:02:13,899 INFO L175 Difference]: Start difference. First operand has 202 places, 235 transitions, 1919 flow. Second operand 24 states and 1878 transitions. [2024-01-27 23:02:13,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 649 transitions, 5972 flow [2024-01-27 23:02:14,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 649 transitions, 5532 flow, removed 215 selfloop flow, removed 5 redundant places. [2024-01-27 23:02:14,228 INFO L231 Difference]: Finished difference. Result has 233 places, 300 transitions, 2806 flow [2024-01-27 23:02:14,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2806, PETRI_PLACES=233, PETRI_TRANSITIONS=300} [2024-01-27 23:02:14,229 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 136 predicate places. [2024-01-27 23:02:14,229 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 300 transitions, 2806 flow [2024-01-27 23:02:14,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.28571428571429) internal successors, (984), 14 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:02:14,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:02:14,230 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:02:14,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-27 23:02:14,430 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,SelfDestructingSolverStorable15 [2024-01-27 23:02:14,432 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:02:14,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:02:14,432 INFO L85 PathProgramCache]: Analyzing trace with hash -708972900, now seen corresponding path program 2 times [2024-01-27 23:02:14,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:02:14,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073406212] [2024-01-27 23:02:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:02:14,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:02:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:02:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:02:14,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:02:14,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073406212] [2024-01-27 23:02:14,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073406212] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:02:14,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630626531] [2024-01-27 23:02:14,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 23:02:14,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:02:14,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:02:14,768 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) [2024-01-27 23:02:14,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 23:02:14,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 23:02:14,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 23:02:14,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 23:02:14,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:02:14,943 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 [2024-01-27 23:02:14,991 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 [2024-01-27 23:02:15,038 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 [2024-01-27 23:02:15,091 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 [2024-01-27 23:02:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:02:15,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:02:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:02:15,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630626531] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:02:15,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:02:15,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2024-01-27 23:02:15,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840220720] [2024-01-27 23:02:15,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:02:15,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 23:02:15,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:02:15,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 23:02:15,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2024-01-27 23:02:15,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-27 23:02:15,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 300 transitions, 2806 flow. Second operand has 19 states, 19 states have (on average 69.47368421052632) internal successors, (1320), 19 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:02:15,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:02:15,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-27 23:02:15,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 23:02:29,648 INFO L124 PetriNetUnfolderBase]: 23763/68562 cut-off events. [2024-01-27 23:02:29,648 INFO L125 PetriNetUnfolderBase]: For 236511/236511 co-relation queries the response was YES. [2024-01-27 23:02:30,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203992 conditions, 68562 events. 23763/68562 cut-off events. For 236511/236511 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 729178 event pairs, 4613 based on Foata normal form. 320/68461 useless extension candidates. Maximal degree in co-relation 203929. Up to 7906 conditions per place. [2024-01-27 23:02:30,506 INFO L140 encePairwiseOnDemand]: 93/99 looper letters, 843 selfloop transitions, 304 changer transitions 4/1185 dead transitions. [2024-01-27 23:02:30,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 1185 transitions, 11809 flow [2024-01-27 23:02:30,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-01-27 23:02:30,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-01-27 23:02:30,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3410 transitions. [2024-01-27 23:02:30,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8010335917312662 [2024-01-27 23:02:30,509 INFO L175 Difference]: Start difference. First operand has 233 places, 300 transitions, 2806 flow. Second operand 43 states and 3410 transitions. [2024-01-27 23:02:30,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 1185 transitions, 11809 flow [2024-01-27 23:02:31,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 1185 transitions, 11620 flow, removed 87 selfloop flow, removed 2 redundant places. [2024-01-27 23:02:31,305 INFO L231 Difference]: Finished difference. Result has 287 places, 476 transitions, 5527 flow [2024-01-27 23:02:31,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=99, PETRI_DIFFERENCE_MINUEND_FLOW=2729, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=5527, PETRI_PLACES=287, PETRI_TRANSITIONS=476} [2024-01-27 23:02:31,306 INFO L281 CegarLoopForPetriNet]: 97 programPoint places, 190 predicate places. [2024-01-27 23:02:31,306 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 476 transitions, 5527 flow [2024-01-27 23:02:31,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 69.47368421052632) internal successors, (1320), 19 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:02:31,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 23:02:31,306 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 23:02:31,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 23:02:31,508 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,SelfDestructingSolverStorable16 [2024-01-27 23:02:31,508 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 65 more)] === [2024-01-27 23:02:31,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 23:02:31,509 INFO L85 PathProgramCache]: Analyzing trace with hash -697819849, now seen corresponding path program 2 times [2024-01-27 23:02:31,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 23:02:31,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768155318] [2024-01-27 23:02:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 23:02:31,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 23:02:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 23:02:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 34 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:02:32,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 23:02:32,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768155318] [2024-01-27 23:02:32,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768155318] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 23:02:32,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582027077] [2024-01-27 23:02:32,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 23:02:32,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 23:02:32,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 23:02:32,931 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 23:02:32,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 23:02:33,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 23:02:33,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 23:02:33,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 23:02:33,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 23:02:33,169 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 15 treesize of output 1 [2024-01-27 23:02:33,350 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 56 treesize of output 28 [2024-01-27 23:02:33,591 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 56 treesize of output 28 [2024-01-27 23:02:34,086 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 78 treesize of output 46 [2024-01-27 23:02:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:02:34,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 23:02:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 23:02:35,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582027077] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 23:02:35,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 23:02:35,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 32 [2024-01-27 23:02:35,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476308186] [2024-01-27 23:02:35,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 23:02:35,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-27 23:02:35,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 23:02:35,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-27 23:02:35,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=763, Unknown=0, NotChecked=0, Total=992 [2024-01-27 23:02:35,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 99 [2024-01-27 23:02:35,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 476 transitions, 5527 flow. Second operand has 32 states, 32 states have (on average 67.78125) internal successors, (2169), 32 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 23:02:35,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 23:02:35,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 99 [2024-01-27 23:02:35,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand