./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/test-easy11.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d8006e4b Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/test-easy11.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-d8006e4-m [2024-02-05 10:36:28,557 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-05 10:36:28,663 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-05 10:36:28,669 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-05 10:36:28,669 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-05 10:36:28,704 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-05 10:36:28,706 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-05 10:36:28,706 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-05 10:36:28,707 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-05 10:36:28,710 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-05 10:36:28,711 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-05 10:36:28,711 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-05 10:36:28,712 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-05 10:36:28,713 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-05 10:36:28,714 INFO L153 SettingsManager]: * Use SBE=true [2024-02-05 10:36:28,714 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-05 10:36:28,714 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-05 10:36:28,714 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-05 10:36:28,715 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-05 10:36:28,715 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-05 10:36:28,715 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-05 10:36:28,716 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-05 10:36:28,716 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-05 10:36:28,716 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-05 10:36:28,717 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-05 10:36:28,717 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-05 10:36:28,717 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-05 10:36:28,718 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-05 10:36:28,718 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-05 10:36:28,718 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-05 10:36:28,719 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-05 10:36:28,720 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-05 10:36:28,720 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:36:28,720 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-05 10:36:28,721 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-05 10:36:28,721 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-05 10:36:28,721 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-05 10:36:28,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-05 10:36:28,721 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-05 10:36:28,722 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-05 10:36:28,722 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-05 10:36:28,722 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-05 10:36:28,723 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-05 10:36:28,723 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-05 10:36:29,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-05 10:36:29,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-05 10:36:29,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-05 10:36:29,041 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-05 10:36:29,042 INFO L274 PluginConnector]: CDTParser initialized [2024-02-05 10:36:29,043 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c [2024-02-05 10:36:30,283 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-05 10:36:30,505 INFO L384 CDTParser]: Found 1 translation units. [2024-02-05 10:36:30,505 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy11.wvr.c [2024-02-05 10:36:30,513 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1a4576ef/baa3eaaa04d54ee2b2c92e095932d7c6/FLAGc63e19a96 [2024-02-05 10:36:30,525 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1a4576ef/baa3eaaa04d54ee2b2c92e095932d7c6 [2024-02-05 10:36:30,528 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-05 10:36:30,529 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-05 10:36:30,530 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/test-easy11.wvr.yml/witness.yml [2024-02-05 10:36:30,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-05 10:36:30,657 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-05 10:36:30,660 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-05 10:36:30,660 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-05 10:36:30,665 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-05 10:36:30,666 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:36:30" (1/2) ... [2024-02-05 10:36:30,668 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15e0c793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:36:30, skipping insertion in model container [2024-02-05 10:36:30,668 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:36:30" (1/2) ... [2024-02-05 10:36:30,671 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5e05ef5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:36:30, skipping insertion in model container [2024-02-05 10:36:30,671 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:36:30" (2/2) ... [2024-02-05 10:36:30,672 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15e0c793 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:30, skipping insertion in model container [2024-02-05 10:36:30,672 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:36:30" (2/2) ... [2024-02-05 10:36:30,673 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-05 10:36:30,712 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-05 10:36:30,713 INFO L101 nessWitnessExtractor]: Location invariant before [L57-L57] (x <= 9999) && ((unsigned long )_argptr == 0UL) [2024-02-05 10:36:30,714 INFO L101 nessWitnessExtractor]: Location invariant before [L73-L73] Y == 0 [2024-02-05 10:36:30,714 INFO L101 nessWitnessExtractor]: Loop invariant at [L43-L43] (unsigned long )_argptr == 0UL [2024-02-05 10:36:30,714 INFO L101 nessWitnessExtractor]: Location invariant before [L50-L50] ((10000 <= x) && ((unsigned long )_argptr == 0UL)) && (x != 0) [2024-02-05 10:36:30,714 INFO L101 nessWitnessExtractor]: Location invariant before [L46-L46] ((10000 <= x) && ((unsigned long )_argptr == 0UL)) && (x != 0) [2024-02-05 10:36:30,714 INFO L101 nessWitnessExtractor]: Location invariant before [L55-L55] (unsigned long )_argptr == 0UL [2024-02-05 10:36:30,715 INFO L101 nessWitnessExtractor]: Location invariant before [L42-L42] (unsigned long )_argptr == 0UL [2024-02-05 10:36:30,715 INFO L101 nessWitnessExtractor]: Location invariant before [L70-L70] Y == 0 [2024-02-05 10:36:30,715 INFO L101 nessWitnessExtractor]: Location invariant before [L48-L48] (((10000 <= Y) && (10000 <= x)) && ((unsigned long )_argptr == 0UL)) && (x != 0) [2024-02-05 10:36:30,715 INFO L101 nessWitnessExtractor]: Location invariant before [L69-L69] ((((((0LL - (long long )X) + (long long )Y >= 0LL) && ((long long )X + (long long )Y >= 0LL)) && ((0LL - (long long )X) - (long long )Y >= 0LL)) && ((long long )X - (long long )Y >= 0LL)) && (X == 0)) && (Y == 0) [2024-02-05 10:36:30,715 INFO L101 nessWitnessExtractor]: Location invariant before [L44-L44] (x <= 9999) && ((unsigned long )_argptr == 0UL) [2024-02-05 10:36:30,715 INFO L101 nessWitnessExtractor]: Location invariant before [L47-L47] (((0 <= Y) && (10000 <= x)) && ((unsigned long )_argptr == 0UL)) && (x != 0) [2024-02-05 10:36:30,716 INFO L101 nessWitnessExtractor]: Location invariant before [L61-L61] (((10000 <= Y) && (10000 <= x)) && ((unsigned long )_argptr == 0UL)) && (x != 0) [2024-02-05 10:36:30,716 INFO L101 nessWitnessExtractor]: Location invariant before [L59-L59] ((10000 <= x) && ((unsigned long )_argptr == 0UL)) && (x != 0) [2024-02-05 10:36:30,716 INFO L101 nessWitnessExtractor]: Location invariant before [L63-L63] ((10000 <= x) && ((unsigned long )_argptr == 0UL)) && (x != 0) [2024-02-05 10:36:30,716 INFO L101 nessWitnessExtractor]: Location invariant before [L60-L60] (((0 <= Y) && (10000 <= x)) && ((unsigned long )_argptr == 0UL)) && (x != 0) [2024-02-05 10:36:30,716 INFO L101 nessWitnessExtractor]: Loop invariant at [L56-L56] (unsigned long )_argptr == 0UL [2024-02-05 10:36:30,744 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-02-05 10:36:30,939 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy11.wvr.c[2031,2044] [2024-02-05 10:36:30,946 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:36:30,956 INFO L204 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-05 10:36:31,021 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy11.wvr.c[2031,2044] [2024-02-05 10:36:31,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:36:31,038 INFO L208 MainTranslator]: Completed translation [2024-02-05 10:36:31,038 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:31 WrapperNode [2024-02-05 10:36:31,038 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-05 10:36:31,040 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-05 10:36:31,040 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-05 10:36:31,040 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-05 10:36:31,046 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 05.02 10:36:31" (1/1) ... [2024-02-05 10:36:31,055 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 05.02 10:36:31" (1/1) ... [2024-02-05 10:36:31,083 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2024-02-05 10:36:31,084 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-05 10:36:31,084 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-05 10:36:31,084 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-05 10:36:31,084 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-05 10:36:31,093 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:31" (1/1) ... [2024-02-05 10:36:31,093 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:31" (1/1) ... [2024-02-05 10:36:31,096 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:31" (1/1) ... [2024-02-05 10:36:31,116 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-02-05 10:36:31,116 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:31" (1/1) ... [2024-02-05 10:36:31,117 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:31" (1/1) ... [2024-02-05 10:36:31,122 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:31" (1/1) ... [2024-02-05 10:36:31,125 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:31" (1/1) ... [2024-02-05 10:36:31,129 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:31" (1/1) ... [2024-02-05 10:36:31,130 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:31" (1/1) ... [2024-02-05 10:36:31,132 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-05 10:36:31,133 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-05 10:36:31,133 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-05 10:36:31,134 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-05 10:36:31,134 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:31" (1/1) ... [2024-02-05 10:36:31,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:36:31,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:31,320 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-05 10:36:31,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-05 10:36:31,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-05 10:36:31,355 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-05 10:36:31,355 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-05 10:36:31,355 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-05 10:36:31,355 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-05 10:36:31,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-05 10:36:31,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-05 10:36:31,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-05 10:36:31,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-05 10:36:31,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-05 10:36:31,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-05 10:36:31,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-05 10:36:31,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-05 10:36:31,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-05 10:36:31,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-05 10:36:31,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-05 10:36:31,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-05 10:36:31,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-05 10:36:31,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-05 10:36:31,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-05 10:36:31,359 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-05 10:36:31,448 INFO L244 CfgBuilder]: Building ICFG [2024-02-05 10:36:31,450 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-05 10:36:31,820 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-05 10:36:31,821 INFO L293 CfgBuilder]: Performing block encoding [2024-02-05 10:36:31,967 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-05 10:36:31,967 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-05 10:36:31,968 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:36:31 BoogieIcfgContainer [2024-02-05 10:36:31,968 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-05 10:36:31,970 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-05 10:36:31,970 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-05 10:36:31,973 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-05 10:36:31,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 10:36:30" (1/4) ... [2024-02-05 10:36:31,974 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a4f696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:36:31, skipping insertion in model container [2024-02-05 10:36:31,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:36:30" (2/4) ... [2024-02-05 10:36:31,975 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a4f696 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:36:31, skipping insertion in model container [2024-02-05 10:36:31,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:31" (3/4) ... [2024-02-05 10:36:31,975 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a4f696 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:36:31, skipping insertion in model container [2024-02-05 10:36:31,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:36:31" (4/4) ... [2024-02-05 10:36:31,977 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2024-02-05 10:36:31,993 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-05 10:36:31,993 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-02-05 10:36:31,994 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-05 10:36:32,061 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-05 10:36:32,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 53 transitions, 120 flow [2024-02-05 10:36:32,153 INFO L124 PetriNetUnfolderBase]: 4/51 cut-off events. [2024-02-05 10:36:32,153 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-05 10:36:32,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 51 events. 4/51 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 111 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2024-02-05 10:36:32,159 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 53 transitions, 120 flow [2024-02-05 10:36:32,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 50 transitions, 112 flow [2024-02-05 10:36:32,175 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:36:32,181 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;@781d4e9f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:36:32,181 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2024-02-05 10:36:32,183 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:36:32,184 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-05 10:36:32,184 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:36:32,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:32,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-05 10:36:32,185 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:32,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:32,192 INFO L85 PathProgramCache]: Analyzing trace with hash 8692, now seen corresponding path program 1 times [2024-02-05 10:36:32,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:32,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46683674] [2024-02-05 10:36:32,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:32,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:32,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:32,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46683674] [2024-02-05 10:36:32,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46683674] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:32,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:32,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-05 10:36:32,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471566449] [2024-02-05 10:36:32,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:32,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:36:32,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:32,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:36:32,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:36:32,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-02-05 10:36:32,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:32,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:32,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-02-05 10:36:32,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:32,680 INFO L124 PetriNetUnfolderBase]: 133/354 cut-off events. [2024-02-05 10:36:32,681 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-02-05 10:36:32,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 354 events. 133/354 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1794 event pairs, 105 based on Foata normal form. 28/299 useless extension candidates. Maximal degree in co-relation 536. Up to 237 conditions per place. [2024-02-05 10:36:32,690 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 24 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-02-05 10:36:32,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 154 flow [2024-02-05 10:36:32,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:36:32,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:36:32,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-02-05 10:36:32,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5911949685534591 [2024-02-05 10:36:32,709 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 112 flow. Second operand 3 states and 94 transitions. [2024-02-05 10:36:32,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 154 flow [2024-02-05 10:36:32,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 45 transitions, 146 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-05 10:36:32,715 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 98 flow [2024-02-05 10:36:32,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2024-02-05 10:36:32,722 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -5 predicate places. [2024-02-05 10:36:32,722 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 98 flow [2024-02-05 10:36:32,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:32,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:32,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-05 10:36:32,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-05 10:36:32,724 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:32,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:32,726 INFO L85 PathProgramCache]: Analyzing trace with hash 269753, now seen corresponding path program 1 times [2024-02-05 10:36:32,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:32,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186072889] [2024-02-05 10:36:32,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:32,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:32,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:32,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186072889] [2024-02-05 10:36:32,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186072889] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:32,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:32,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-05 10:36:32,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854315726] [2024-02-05 10:36:32,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:32,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:36:32,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:32,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:36:32,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:36:32,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2024-02-05 10:36:32,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:32,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:32,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2024-02-05 10:36:32,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:32,914 INFO L124 PetriNetUnfolderBase]: 133/343 cut-off events. [2024-02-05 10:36:32,914 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-05 10:36:32,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 590 conditions, 343 events. 133/343 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1694 event pairs, 47 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 581. Up to 135 conditions per place. [2024-02-05 10:36:32,929 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 34 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2024-02-05 10:36:32,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 56 transitions, 195 flow [2024-02-05 10:36:32,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:36:32,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:36:32,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-02-05 10:36:32,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.660377358490566 [2024-02-05 10:36:32,933 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 98 flow. Second operand 3 states and 105 transitions. [2024-02-05 10:36:32,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 56 transitions, 195 flow [2024-02-05 10:36:32,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 56 transitions, 191 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:36:32,939 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 107 flow [2024-02-05 10:36:32,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-02-05 10:36:32,940 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -6 predicate places. [2024-02-05 10:36:32,940 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 107 flow [2024-02-05 10:36:32,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:32,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:32,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:32,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-05 10:36:32,941 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:32,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:32,948 INFO L85 PathProgramCache]: Analyzing trace with hash 23045690, now seen corresponding path program 1 times [2024-02-05 10:36:32,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:32,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595884656] [2024-02-05 10:36:32,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:32,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:33,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:33,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595884656] [2024-02-05 10:36:33,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595884656] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:33,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:33,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:36:33,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750328644] [2024-02-05 10:36:33,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:33,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:36:33,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:33,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:36:33,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:36:33,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2024-02-05 10:36:33,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:33,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:33,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2024-02-05 10:36:33,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:33,223 INFO L124 PetriNetUnfolderBase]: 133/343 cut-off events. [2024-02-05 10:36:33,223 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-02-05 10:36:33,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 343 events. 133/343 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1697 event pairs, 31 based on Foata normal form. 14/315 useless extension candidates. Maximal degree in co-relation 281. Up to 210 conditions per place. [2024-02-05 10:36:33,226 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 33 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-02-05 10:36:33,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 195 flow [2024-02-05 10:36:33,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:36:33,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:36:33,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-02-05 10:36:33,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801886792452831 [2024-02-05 10:36:33,228 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 107 flow. Second operand 4 states and 123 transitions. [2024-02-05 10:36:33,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 195 flow [2024-02-05 10:36:33,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 191 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:36:33,231 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 104 flow [2024-02-05 10:36:33,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2024-02-05 10:36:33,232 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -6 predicate places. [2024-02-05 10:36:33,232 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 104 flow [2024-02-05 10:36:33,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:33,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:33,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:33,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-05 10:36:33,233 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:33,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:33,233 INFO L85 PathProgramCache]: Analyzing trace with hash 671368790, now seen corresponding path program 1 times [2024-02-05 10:36:33,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:33,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512313271] [2024-02-05 10:36:33,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:33,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:33,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:33,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512313271] [2024-02-05 10:36:33,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512313271] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:33,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:33,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:36:33,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428143968] [2024-02-05 10:36:33,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:33,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:36:33,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:33,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:36:33,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:36:33,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2024-02-05 10:36:33,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:33,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:33,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2024-02-05 10:36:33,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:33,533 INFO L124 PetriNetUnfolderBase]: 133/348 cut-off events. [2024-02-05 10:36:33,534 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-02-05 10:36:33,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 348 events. 133/348 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1714 event pairs, 5 based on Foata normal form. 14/323 useless extension candidates. Maximal degree in co-relation 494. Up to 186 conditions per place. [2024-02-05 10:36:33,537 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 39 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2024-02-05 10:36:33,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 56 transitions, 221 flow [2024-02-05 10:36:33,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:36:33,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:36:33,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-02-05 10:36:33,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6084905660377359 [2024-02-05 10:36:33,541 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 104 flow. Second operand 4 states and 129 transitions. [2024-02-05 10:36:33,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 56 transitions, 221 flow [2024-02-05 10:36:33,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 56 transitions, 216 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:36:33,543 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 101 flow [2024-02-05 10:36:33,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-02-05 10:36:33,545 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -7 predicate places. [2024-02-05 10:36:33,545 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 101 flow [2024-02-05 10:36:33,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:33,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:33,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:33,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-05 10:36:33,546 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:33,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:33,547 INFO L85 PathProgramCache]: Analyzing trace with hash -640311652, now seen corresponding path program 1 times [2024-02-05 10:36:33,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:33,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419984423] [2024-02-05 10:36:33,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:33,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:33,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:33,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419984423] [2024-02-05 10:36:33,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419984423] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:33,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:33,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:36:33,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142060152] [2024-02-05 10:36:33,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:33,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:36:33,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:33,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:36:33,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:36:33,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-02-05 10:36:33,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:33,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:33,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-02-05 10:36:33,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:33,793 INFO L124 PetriNetUnfolderBase]: 233/439 cut-off events. [2024-02-05 10:36:33,793 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-02-05 10:36:33,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 439 events. 233/439 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1908 event pairs, 31 based on Foata normal form. 0/393 useless extension candidates. Maximal degree in co-relation 789. Up to 230 conditions per place. [2024-02-05 10:36:33,798 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 46 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2024-02-05 10:36:33,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 57 transitions, 245 flow [2024-02-05 10:36:33,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:36:33,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:36:33,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-02-05 10:36:33,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141509433962265 [2024-02-05 10:36:33,801 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 101 flow. Second operand 4 states and 109 transitions. [2024-02-05 10:36:33,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 57 transitions, 245 flow [2024-02-05 10:36:33,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 236 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:36:33,805 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 100 flow [2024-02-05 10:36:33,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-02-05 10:36:33,809 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -8 predicate places. [2024-02-05 10:36:33,809 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 100 flow [2024-02-05 10:36:33,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:33,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:33,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:33,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-05 10:36:33,810 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:33,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:33,811 INFO L85 PathProgramCache]: Analyzing trace with hash -640311619, now seen corresponding path program 1 times [2024-02-05 10:36:33,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:33,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523139165] [2024-02-05 10:36:33,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:33,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:33,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:33,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523139165] [2024-02-05 10:36:33,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523139165] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:33,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:33,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:36:33,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664774289] [2024-02-05 10:36:33,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:33,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:36:33,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:33,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:36:33,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:36:33,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-02-05 10:36:33,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:33,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:33,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-02-05 10:36:33,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:34,014 INFO L124 PetriNetUnfolderBase]: 213/405 cut-off events. [2024-02-05 10:36:34,015 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-02-05 10:36:34,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 405 events. 213/405 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1705 event pairs, 31 based on Foata normal form. 14/401 useless extension candidates. Maximal degree in co-relation 736. Up to 278 conditions per place. [2024-02-05 10:36:34,018 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 45 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2024-02-05 10:36:34,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 56 transitions, 236 flow [2024-02-05 10:36:34,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:36:34,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:36:34,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-02-05 10:36:34,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-02-05 10:36:34,020 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 100 flow. Second operand 4 states and 107 transitions. [2024-02-05 10:36:34,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 56 transitions, 236 flow [2024-02-05 10:36:34,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 56 transitions, 233 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:36:34,022 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 99 flow [2024-02-05 10:36:34,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=99, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-02-05 10:36:34,025 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -8 predicate places. [2024-02-05 10:36:34,025 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 99 flow [2024-02-05 10:36:34,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:34,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:34,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:34,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-05 10:36:34,027 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:34,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:34,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1625175584, now seen corresponding path program 1 times [2024-02-05 10:36:34,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:34,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381940957] [2024-02-05 10:36:34,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:34,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:34,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:34,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381940957] [2024-02-05 10:36:34,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381940957] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:34,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:34,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:36:34,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926988157] [2024-02-05 10:36:34,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:34,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:36:34,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:34,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:36:34,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-05 10:36:34,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-02-05 10:36:34,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:34,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:34,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-02-05 10:36:34,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:34,260 INFO L124 PetriNetUnfolderBase]: 193/371 cut-off events. [2024-02-05 10:36:34,260 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-02-05 10:36:34,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 847 conditions, 371 events. 193/371 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1501 event pairs, 31 based on Foata normal form. 14/367 useless extension candidates. Maximal degree in co-relation 693. Up to 162 conditions per place. [2024-02-05 10:36:34,263 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 44 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2024-02-05 10:36:34,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 235 flow [2024-02-05 10:36:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:36:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:36:34,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-02-05 10:36:34,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45660377358490567 [2024-02-05 10:36:34,264 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 99 flow. Second operand 5 states and 121 transitions. [2024-02-05 10:36:34,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 235 flow [2024-02-05 10:36:34,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 229 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-05 10:36:34,277 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 97 flow [2024-02-05 10:36:34,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=97, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2024-02-05 10:36:34,278 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -8 predicate places. [2024-02-05 10:36:34,278 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 97 flow [2024-02-05 10:36:34,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:34,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:34,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:34,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-05 10:36:34,279 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:34,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:34,279 INFO L85 PathProgramCache]: Analyzing trace with hash -914752783, now seen corresponding path program 1 times [2024-02-05 10:36:34,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:34,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075053707] [2024-02-05 10:36:34,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:34,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:34,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:34,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075053707] [2024-02-05 10:36:34,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075053707] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:34,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:34,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:36:34,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086077185] [2024-02-05 10:36:34,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:34,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:36:34,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:34,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:36:34,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:36:34,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-02-05 10:36:34,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:34,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:34,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-02-05 10:36:34,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:34,439 INFO L124 PetriNetUnfolderBase]: 198/359 cut-off events. [2024-02-05 10:36:34,439 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-02-05 10:36:34,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 819 conditions, 359 events. 198/359 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1305 event pairs, 27 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 631. Up to 176 conditions per place. [2024-02-05 10:36:34,442 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 43 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2024-02-05 10:36:34,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 229 flow [2024-02-05 10:36:34,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:36:34,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:36:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-02-05 10:36:34,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-02-05 10:36:34,444 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 97 flow. Second operand 4 states and 106 transitions. [2024-02-05 10:36:34,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 229 flow [2024-02-05 10:36:34,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 220 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-05 10:36:34,445 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 94 flow [2024-02-05 10:36:34,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-02-05 10:36:34,446 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -10 predicate places. [2024-02-05 10:36:34,446 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 94 flow [2024-02-05 10:36:34,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:34,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:34,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:34,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-05 10:36:34,447 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:34,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:34,447 INFO L85 PathProgramCache]: Analyzing trace with hash -914752750, now seen corresponding path program 1 times [2024-02-05 10:36:34,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:34,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396124611] [2024-02-05 10:36:34,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:34,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:34,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:34,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396124611] [2024-02-05 10:36:34,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396124611] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:34,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:34,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:36:34,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136208777] [2024-02-05 10:36:34,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:34,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:36:34,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:34,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:36:34,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:36:34,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-02-05 10:36:34,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:34,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:34,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-02-05 10:36:34,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:34,610 INFO L124 PetriNetUnfolderBase]: 181/330 cut-off events. [2024-02-05 10:36:34,611 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-02-05 10:36:34,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 330 events. 181/330 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1179 event pairs, 27 based on Foata normal form. 12/331 useless extension candidates. Maximal degree in co-relation 578. Up to 217 conditions per place. [2024-02-05 10:36:34,613 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 42 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2024-02-05 10:36:34,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 50 transitions, 220 flow [2024-02-05 10:36:34,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:36:34,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:36:34,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-02-05 10:36:34,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-02-05 10:36:34,615 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 94 flow. Second operand 4 states and 104 transitions. [2024-02-05 10:36:34,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 50 transitions, 220 flow [2024-02-05 10:36:34,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 217 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:36:34,617 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 93 flow [2024-02-05 10:36:34,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2024-02-05 10:36:34,618 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -10 predicate places. [2024-02-05 10:36:34,618 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 93 flow [2024-02-05 10:36:34,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:34,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:34,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:34,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-05 10:36:34,619 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:34,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:34,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1707435132, now seen corresponding path program 1 times [2024-02-05 10:36:34,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:34,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189138253] [2024-02-05 10:36:34,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:34,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:34,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:34,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189138253] [2024-02-05 10:36:34,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189138253] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:34,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:34,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:36:34,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587218675] [2024-02-05 10:36:34,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:34,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:36:34,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:34,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:36:34,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-02-05 10:36:34,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-02-05 10:36:34,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:34,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:34,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-02-05 10:36:34,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:34,819 INFO L124 PetriNetUnfolderBase]: 164/301 cut-off events. [2024-02-05 10:36:34,819 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-02-05 10:36:34,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 301 events. 164/301 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1037 event pairs, 27 based on Foata normal form. 12/302 useless extension candidates. Maximal degree in co-relation 548. Up to 118 conditions per place. [2024-02-05 10:36:34,822 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 41 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2024-02-05 10:36:34,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 49 transitions, 219 flow [2024-02-05 10:36:34,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:36:34,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:36:34,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-02-05 10:36:34,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44528301886792454 [2024-02-05 10:36:34,823 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 93 flow. Second operand 5 states and 118 transitions. [2024-02-05 10:36:34,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 49 transitions, 219 flow [2024-02-05 10:36:34,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 49 transitions, 213 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-05 10:36:34,825 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 91 flow [2024-02-05 10:36:34,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2024-02-05 10:36:34,826 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -10 predicate places. [2024-02-05 10:36:34,826 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 91 flow [2024-02-05 10:36:34,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:34,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:34,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:34,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-05 10:36:34,827 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:34,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:34,828 INFO L85 PathProgramCache]: Analyzing trace with hash -2079742442, now seen corresponding path program 1 times [2024-02-05 10:36:34,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:34,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855048872] [2024-02-05 10:36:34,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:34,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:34,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:34,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855048872] [2024-02-05 10:36:34,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855048872] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:34,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:34,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-05 10:36:34,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156387162] [2024-02-05 10:36:34,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:34,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-05 10:36:34,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:34,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-05 10:36:34,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-02-05 10:36:35,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-02-05 10:36:35,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 91 flow. Second operand has 9 states, 9 states have (on average 23.444444444444443) internal successors, (211), 9 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:35,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:35,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-02-05 10:36:35,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:35,413 INFO L124 PetriNetUnfolderBase]: 183/399 cut-off events. [2024-02-05 10:36:35,414 INFO L125 PetriNetUnfolderBase]: For 58/64 co-relation queries the response was YES. [2024-02-05 10:36:35,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 885 conditions, 399 events. 183/399 cut-off events. For 58/64 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1668 event pairs, 23 based on Foata normal form. 5/388 useless extension candidates. Maximal degree in co-relation 726. Up to 92 conditions per place. [2024-02-05 10:36:35,417 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 49 selfloop transitions, 10 changer transitions 13/78 dead transitions. [2024-02-05 10:36:35,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 78 transitions, 352 flow [2024-02-05 10:36:35,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-05 10:36:35,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-05 10:36:35,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 262 transitions. [2024-02-05 10:36:35,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549266247379455 [2024-02-05 10:36:35,419 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 91 flow. Second operand 9 states and 262 transitions. [2024-02-05 10:36:35,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 78 transitions, 352 flow [2024-02-05 10:36:35,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 78 transitions, 340 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-05 10:36:35,421 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 137 flow [2024-02-05 10:36:35,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=137, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2024-02-05 10:36:35,422 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2024-02-05 10:36:35,422 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 137 flow [2024-02-05 10:36:35,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.444444444444443) internal successors, (211), 9 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:35,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:35,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:35,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-05 10:36:35,423 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:35,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:35,424 INFO L85 PathProgramCache]: Analyzing trace with hash 959616602, now seen corresponding path program 2 times [2024-02-05 10:36:35,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:35,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893108380] [2024-02-05 10:36:35,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:35,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:35,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:35,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893108380] [2024-02-05 10:36:35,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893108380] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:35,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:35,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-05 10:36:35,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018706416] [2024-02-05 10:36:35,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:35,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-05 10:36:35,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:35,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-05 10:36:35,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-02-05 10:36:35,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-02-05 10:36:35,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 137 flow. Second operand has 9 states, 9 states have (on average 21.666666666666668) internal successors, (195), 9 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:35,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:35,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-02-05 10:36:35,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:36,019 INFO L124 PetriNetUnfolderBase]: 251/477 cut-off events. [2024-02-05 10:36:36,020 INFO L125 PetriNetUnfolderBase]: For 188/188 co-relation queries the response was YES. [2024-02-05 10:36:36,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1267 conditions, 477 events. 251/477 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1871 event pairs, 39 based on Foata normal form. 1/473 useless extension candidates. Maximal degree in co-relation 1255. Up to 203 conditions per place. [2024-02-05 10:36:36,023 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 52 selfloop transitions, 13 changer transitions 13/82 dead transitions. [2024-02-05 10:36:36,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 82 transitions, 435 flow [2024-02-05 10:36:36,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-05 10:36:36,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-05 10:36:36,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-02-05 10:36:36,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519916142557652 [2024-02-05 10:36:36,024 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 137 flow. Second operand 9 states and 248 transitions. [2024-02-05 10:36:36,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 82 transitions, 435 flow [2024-02-05 10:36:36,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 82 transitions, 413 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-02-05 10:36:36,027 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 200 flow [2024-02-05 10:36:36,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=200, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2024-02-05 10:36:36,028 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 6 predicate places. [2024-02-05 10:36:36,028 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 200 flow [2024-02-05 10:36:36,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.666666666666668) internal successors, (195), 9 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:36,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:36,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:36,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-05 10:36:36,029 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:36,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:36,030 INFO L85 PathProgramCache]: Analyzing trace with hash 327625558, now seen corresponding path program 3 times [2024-02-05 10:36:36,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:36,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905523573] [2024-02-05 10:36:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:36,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:36,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:36,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905523573] [2024-02-05 10:36:36,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905523573] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:36,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:36,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-05 10:36:36,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829698872] [2024-02-05 10:36:36,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:36,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-05 10:36:36,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:36,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-05 10:36:36,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-02-05 10:36:36,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-02-05 10:36:36,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 200 flow. Second operand has 9 states, 9 states have (on average 21.666666666666668) internal successors, (195), 9 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:36,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:36,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-02-05 10:36:36,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:36,585 INFO L124 PetriNetUnfolderBase]: 265/505 cut-off events. [2024-02-05 10:36:36,585 INFO L125 PetriNetUnfolderBase]: For 395/399 co-relation queries the response was YES. [2024-02-05 10:36:36,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1479 conditions, 505 events. 265/505 cut-off events. For 395/399 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2029 event pairs, 35 based on Foata normal form. 1/485 useless extension candidates. Maximal degree in co-relation 1463. Up to 195 conditions per place. [2024-02-05 10:36:36,589 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 57 selfloop transitions, 18 changer transitions 11/90 dead transitions. [2024-02-05 10:36:36,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 552 flow [2024-02-05 10:36:36,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-05 10:36:36,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-05 10:36:36,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-02-05 10:36:36,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5241090146750524 [2024-02-05 10:36:36,592 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 200 flow. Second operand 9 states and 250 transitions. [2024-02-05 10:36:36,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 552 flow [2024-02-05 10:36:36,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 90 transitions, 520 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-02-05 10:36:36,597 INFO L231 Difference]: Finished difference. Result has 65 places, 50 transitions, 281 flow [2024-02-05 10:36:36,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=281, PETRI_PLACES=65, PETRI_TRANSITIONS=50} [2024-02-05 10:36:36,598 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 12 predicate places. [2024-02-05 10:36:36,598 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 50 transitions, 281 flow [2024-02-05 10:36:36,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.666666666666668) internal successors, (195), 9 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:36,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:36,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:36,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-05 10:36:36,600 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:36,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:36,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2119666054, now seen corresponding path program 4 times [2024-02-05 10:36:36,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:36,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285704519] [2024-02-05 10:36:36,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:36,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:36,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:36,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285704519] [2024-02-05 10:36:36,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285704519] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:36,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:36,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-05 10:36:36,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010341184] [2024-02-05 10:36:36,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:36,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-05 10:36:36,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:36,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-05 10:36:36,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-02-05 10:36:36,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-02-05 10:36:36,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 50 transitions, 281 flow. Second operand has 9 states, 9 states have (on average 21.666666666666668) internal successors, (195), 9 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:36,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:36,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-02-05 10:36:36,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:37,274 INFO L124 PetriNetUnfolderBase]: 330/610 cut-off events. [2024-02-05 10:36:37,275 INFO L125 PetriNetUnfolderBase]: For 744/744 co-relation queries the response was YES. [2024-02-05 10:36:37,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1960 conditions, 610 events. 330/610 cut-off events. For 744/744 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2616 event pairs, 51 based on Foata normal form. 1/606 useless extension candidates. Maximal degree in co-relation 1942. Up to 227 conditions per place. [2024-02-05 10:36:37,280 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 52 selfloop transitions, 29 changer transitions 13/98 dead transitions. [2024-02-05 10:36:37,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 98 transitions, 671 flow [2024-02-05 10:36:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-05 10:36:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-05 10:36:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 251 transitions. [2024-02-05 10:36:37,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5262054507337526 [2024-02-05 10:36:37,282 INFO L175 Difference]: Start difference. First operand has 65 places, 50 transitions, 281 flow. Second operand 9 states and 251 transitions. [2024-02-05 10:36:37,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 98 transitions, 671 flow [2024-02-05 10:36:37,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 98 transitions, 623 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-02-05 10:36:37,287 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 431 flow [2024-02-05 10:36:37,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=431, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2024-02-05 10:36:37,289 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 17 predicate places. [2024-02-05 10:36:37,289 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 431 flow [2024-02-05 10:36:37,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.666666666666668) internal successors, (195), 9 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:37,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:37,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:37,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-05 10:36:37,290 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:37,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:37,291 INFO L85 PathProgramCache]: Analyzing trace with hash 698685436, now seen corresponding path program 5 times [2024-02-05 10:36:37,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:37,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050010236] [2024-02-05 10:36:37,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:37,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:37,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:37,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050010236] [2024-02-05 10:36:37,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050010236] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:37,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:37,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-05 10:36:37,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751138205] [2024-02-05 10:36:37,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:37,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-05 10:36:37,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:37,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-05 10:36:37,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-02-05 10:36:37,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-02-05 10:36:37,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 431 flow. Second operand has 9 states, 9 states have (on average 21.666666666666668) internal successors, (195), 9 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:37,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:37,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-02-05 10:36:37,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:37,915 INFO L124 PetriNetUnfolderBase]: 378/694 cut-off events. [2024-02-05 10:36:37,915 INFO L125 PetriNetUnfolderBase]: For 1485/1497 co-relation queries the response was YES. [2024-02-05 10:36:37,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2600 conditions, 694 events. 378/694 cut-off events. For 1485/1497 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3183 event pairs, 53 based on Foata normal form. 9/702 useless extension candidates. Maximal degree in co-relation 2579. Up to 244 conditions per place. [2024-02-05 10:36:37,921 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 60 selfloop transitions, 35 changer transitions 11/110 dead transitions. [2024-02-05 10:36:37,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 110 transitions, 894 flow [2024-02-05 10:36:37,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-05 10:36:37,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-05 10:36:37,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 251 transitions. [2024-02-05 10:36:37,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5262054507337526 [2024-02-05 10:36:37,924 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 431 flow. Second operand 9 states and 251 transitions. [2024-02-05 10:36:37,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 110 transitions, 894 flow [2024-02-05 10:36:37,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 110 transitions, 853 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-02-05 10:36:37,930 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 623 flow [2024-02-05 10:36:37,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=623, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2024-02-05 10:36:37,931 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 23 predicate places. [2024-02-05 10:36:37,931 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 623 flow [2024-02-05 10:36:37,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.666666666666668) internal successors, (195), 9 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:37,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:37,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:37,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-05 10:36:37,932 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:37,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:37,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1635677786, now seen corresponding path program 6 times [2024-02-05 10:36:37,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:37,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700129008] [2024-02-05 10:36:37,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:37,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:38,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:38,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700129008] [2024-02-05 10:36:38,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700129008] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:38,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:38,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-05 10:36:38,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226027698] [2024-02-05 10:36:38,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:38,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-05 10:36:38,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:38,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-05 10:36:38,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-02-05 10:36:38,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-02-05 10:36:38,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 623 flow. Second operand has 9 states, 9 states have (on average 21.666666666666668) internal successors, (195), 9 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:38,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:38,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-02-05 10:36:38,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:38,540 INFO L124 PetriNetUnfolderBase]: 384/706 cut-off events. [2024-02-05 10:36:38,540 INFO L125 PetriNetUnfolderBase]: For 2153/2161 co-relation queries the response was YES. [2024-02-05 10:36:38,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2868 conditions, 706 events. 384/706 cut-off events. For 2153/2161 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3204 event pairs, 81 based on Foata normal form. 5/711 useless extension candidates. Maximal degree in co-relation 2844. Up to 233 conditions per place. [2024-02-05 10:36:38,546 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 60 selfloop transitions, 32 changer transitions 18/114 dead transitions. [2024-02-05 10:36:38,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 114 transitions, 1018 flow [2024-02-05 10:36:38,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-05 10:36:38,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-05 10:36:38,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 252 transitions. [2024-02-05 10:36:38,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-02-05 10:36:38,549 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 623 flow. Second operand 9 states and 252 transitions. [2024-02-05 10:36:38,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 114 transitions, 1018 flow [2024-02-05 10:36:38,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 114 transitions, 976 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-02-05 10:36:38,556 INFO L231 Difference]: Finished difference. Result has 80 places, 73 transitions, 650 flow [2024-02-05 10:36:38,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=650, PETRI_PLACES=80, PETRI_TRANSITIONS=73} [2024-02-05 10:36:38,557 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 27 predicate places. [2024-02-05 10:36:38,558 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 73 transitions, 650 flow [2024-02-05 10:36:38,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.666666666666668) internal successors, (195), 9 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:38,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:38,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:38,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-02-05 10:36:38,560 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:38,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:38,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1141438836, now seen corresponding path program 7 times [2024-02-05 10:36:38,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:38,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301674259] [2024-02-05 10:36:38,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:38,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:38,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:38,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301674259] [2024-02-05 10:36:38,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301674259] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:38,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:38,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-05 10:36:38,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528122482] [2024-02-05 10:36:38,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:38,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-05 10:36:38,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:38,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-05 10:36:38,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-02-05 10:36:38,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-02-05 10:36:38,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 73 transitions, 650 flow. Second operand has 9 states, 9 states have (on average 23.444444444444443) internal successors, (211), 9 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:38,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:38,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-02-05 10:36:38,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:39,167 INFO L124 PetriNetUnfolderBase]: 276/564 cut-off events. [2024-02-05 10:36:39,167 INFO L125 PetriNetUnfolderBase]: For 2272/2332 co-relation queries the response was YES. [2024-02-05 10:36:39,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2275 conditions, 564 events. 276/564 cut-off events. For 2272/2332 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2651 event pairs, 45 based on Foata normal form. 17/573 useless extension candidates. Maximal degree in co-relation 2250. Up to 203 conditions per place. [2024-02-05 10:36:39,172 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 58 selfloop transitions, 32 changer transitions 13/112 dead transitions. [2024-02-05 10:36:39,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 112 transitions, 1010 flow [2024-02-05 10:36:39,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-05 10:36:39,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-05 10:36:39,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 266 transitions. [2024-02-05 10:36:39,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576519916142557 [2024-02-05 10:36:39,175 INFO L175 Difference]: Start difference. First operand has 80 places, 73 transitions, 650 flow. Second operand 9 states and 266 transitions. [2024-02-05 10:36:39,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 112 transitions, 1010 flow [2024-02-05 10:36:39,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 112 transitions, 936 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-02-05 10:36:39,183 INFO L231 Difference]: Finished difference. Result has 83 places, 74 transitions, 666 flow [2024-02-05 10:36:39,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=666, PETRI_PLACES=83, PETRI_TRANSITIONS=74} [2024-02-05 10:36:39,184 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 30 predicate places. [2024-02-05 10:36:39,184 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 74 transitions, 666 flow [2024-02-05 10:36:39,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.444444444444443) internal successors, (211), 9 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:39,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:39,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:39,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-02-05 10:36:39,185 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:39,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:39,186 INFO L85 PathProgramCache]: Analyzing trace with hash 103549700, now seen corresponding path program 8 times [2024-02-05 10:36:39,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:39,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047517667] [2024-02-05 10:36:39,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:39,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:39,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:39,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047517667] [2024-02-05 10:36:39,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047517667] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:39,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:39,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-05 10:36:39,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775781175] [2024-02-05 10:36:39,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:39,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-05 10:36:39,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:39,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-05 10:36:39,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-02-05 10:36:39,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-02-05 10:36:39,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 74 transitions, 666 flow. Second operand has 9 states, 9 states have (on average 23.444444444444443) internal successors, (211), 9 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:39,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:39,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-02-05 10:36:39,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:39,713 INFO L124 PetriNetUnfolderBase]: 276/552 cut-off events. [2024-02-05 10:36:39,713 INFO L125 PetriNetUnfolderBase]: For 2791/2885 co-relation queries the response was YES. [2024-02-05 10:36:39,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2289 conditions, 552 events. 276/552 cut-off events. For 2791/2885 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2528 event pairs, 21 based on Foata normal form. 31/571 useless extension candidates. Maximal degree in co-relation 2263. Up to 203 conditions per place. [2024-02-05 10:36:39,719 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 53 selfloop transitions, 32 changer transitions 11/106 dead transitions. [2024-02-05 10:36:39,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 106 transitions, 981 flow [2024-02-05 10:36:39,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-05 10:36:39,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-05 10:36:39,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 259 transitions. [2024-02-05 10:36:39,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5429769392033543 [2024-02-05 10:36:39,722 INFO L175 Difference]: Start difference. First operand has 83 places, 74 transitions, 666 flow. Second operand 9 states and 259 transitions. [2024-02-05 10:36:39,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 106 transitions, 981 flow [2024-02-05 10:36:39,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 106 transitions, 907 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-02-05 10:36:39,730 INFO L231 Difference]: Finished difference. Result has 85 places, 75 transitions, 676 flow [2024-02-05 10:36:39,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=676, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2024-02-05 10:36:39,732 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 32 predicate places. [2024-02-05 10:36:39,732 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 676 flow [2024-02-05 10:36:39,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.444444444444443) internal successors, (211), 9 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:39,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:39,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:39,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-02-05 10:36:39,733 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:39,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:39,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1211347780, now seen corresponding path program 9 times [2024-02-05 10:36:39,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:39,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112791750] [2024-02-05 10:36:39,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:39,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:39,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:39,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112791750] [2024-02-05 10:36:39,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112791750] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:39,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:39,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-05 10:36:39,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943851905] [2024-02-05 10:36:39,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:39,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-05 10:36:39,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:39,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-05 10:36:39,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-02-05 10:36:40,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-02-05 10:36:40,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 75 transitions, 676 flow. Second operand has 9 states, 9 states have (on average 21.666666666666668) internal successors, (195), 9 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:40,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:40,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-02-05 10:36:40,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:40,306 INFO L124 PetriNetUnfolderBase]: 376/699 cut-off events. [2024-02-05 10:36:40,306 INFO L125 PetriNetUnfolderBase]: For 2900/2932 co-relation queries the response was YES. [2024-02-05 10:36:40,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2901 conditions, 699 events. 376/699 cut-off events. For 2900/2932 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3268 event pairs, 83 based on Foata normal form. 19/713 useless extension candidates. Maximal degree in co-relation 2874. Up to 233 conditions per place. [2024-02-05 10:36:40,314 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 62 selfloop transitions, 29 changer transitions 16/111 dead transitions. [2024-02-05 10:36:40,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 111 transitions, 1052 flow [2024-02-05 10:36:40,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-05 10:36:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-05 10:36:40,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-02-05 10:36:40,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519916142557652 [2024-02-05 10:36:40,317 INFO L175 Difference]: Start difference. First operand has 85 places, 75 transitions, 676 flow. Second operand 9 states and 248 transitions. [2024-02-05 10:36:40,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 111 transitions, 1052 flow [2024-02-05 10:36:40,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 111 transitions, 976 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-02-05 10:36:40,329 INFO L231 Difference]: Finished difference. Result has 87 places, 74 transitions, 660 flow [2024-02-05 10:36:40,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=660, PETRI_PLACES=87, PETRI_TRANSITIONS=74} [2024-02-05 10:36:40,330 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 34 predicate places. [2024-02-05 10:36:40,330 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 74 transitions, 660 flow [2024-02-05 10:36:40,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.666666666666668) internal successors, (195), 9 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:40,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:40,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:40,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-02-05 10:36:40,332 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:40,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:40,333 INFO L85 PathProgramCache]: Analyzing trace with hash -34062262, now seen corresponding path program 10 times [2024-02-05 10:36:40,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:40,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052312397] [2024-02-05 10:36:40,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:40,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:40,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:40,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052312397] [2024-02-05 10:36:40,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052312397] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:40,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:40,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-05 10:36:40,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744997489] [2024-02-05 10:36:40,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:40,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-05 10:36:40,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:40,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-05 10:36:40,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-02-05 10:36:40,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-02-05 10:36:40,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 74 transitions, 660 flow. Second operand has 9 states, 9 states have (on average 23.444444444444443) internal successors, (211), 9 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:40,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:40,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-02-05 10:36:40,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:40,865 INFO L124 PetriNetUnfolderBase]: 272/557 cut-off events. [2024-02-05 10:36:40,866 INFO L125 PetriNetUnfolderBase]: For 2682/2768 co-relation queries the response was YES. [2024-02-05 10:36:40,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2278 conditions, 557 events. 272/557 cut-off events. For 2682/2768 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2620 event pairs, 51 based on Foata normal form. 23/566 useless extension candidates. Maximal degree in co-relation 2250. Up to 199 conditions per place. [2024-02-05 10:36:40,871 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 57 selfloop transitions, 29 changer transitions 11/107 dead transitions. [2024-02-05 10:36:40,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 107 transitions, 996 flow [2024-02-05 10:36:40,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-05 10:36:40,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-05 10:36:40,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 260 transitions. [2024-02-05 10:36:40,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5450733752620545 [2024-02-05 10:36:40,873 INFO L175 Difference]: Start difference. First operand has 87 places, 74 transitions, 660 flow. Second operand 9 states and 260 transitions. [2024-02-05 10:36:40,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 107 transitions, 996 flow [2024-02-05 10:36:40,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 107 transitions, 944 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-02-05 10:36:40,881 INFO L231 Difference]: Finished difference. Result has 90 places, 75 transitions, 692 flow [2024-02-05 10:36:40,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=692, PETRI_PLACES=90, PETRI_TRANSITIONS=75} [2024-02-05 10:36:40,881 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 37 predicate places. [2024-02-05 10:36:40,882 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 75 transitions, 692 flow [2024-02-05 10:36:40,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.444444444444443) internal successors, (211), 9 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:40,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:40,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:40,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-02-05 10:36:40,883 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:40,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:40,884 INFO L85 PathProgramCache]: Analyzing trace with hash -580335334, now seen corresponding path program 11 times [2024-02-05 10:36:40,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:40,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781419878] [2024-02-05 10:36:40,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:40,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:41,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:41,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781419878] [2024-02-05 10:36:41,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781419878] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:41,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:41,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-05 10:36:41,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204751895] [2024-02-05 10:36:41,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:41,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-05 10:36:41,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:41,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-05 10:36:41,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-02-05 10:36:41,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-02-05 10:36:41,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 75 transitions, 692 flow. Second operand has 9 states, 9 states have (on average 23.444444444444443) internal successors, (211), 9 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:41,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:41,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-02-05 10:36:41,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:41,434 INFO L124 PetriNetUnfolderBase]: 292/608 cut-off events. [2024-02-05 10:36:41,434 INFO L125 PetriNetUnfolderBase]: For 3210/3257 co-relation queries the response was YES. [2024-02-05 10:36:41,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2470 conditions, 608 events. 292/608 cut-off events. For 3210/3257 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2979 event pairs, 31 based on Foata normal form. 13/611 useless extension candidates. Maximal degree in co-relation 2441. Up to 245 conditions per place. [2024-02-05 10:36:41,440 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 57 selfloop transitions, 29 changer transitions 13/109 dead transitions. [2024-02-05 10:36:41,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 109 transitions, 1029 flow [2024-02-05 10:36:41,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-05 10:36:41,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-05 10:36:41,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 261 transitions. [2024-02-05 10:36:41,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5471698113207547 [2024-02-05 10:36:41,441 INFO L175 Difference]: Start difference. First operand has 90 places, 75 transitions, 692 flow. Second operand 9 states and 261 transitions. [2024-02-05 10:36:41,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 109 transitions, 1029 flow [2024-02-05 10:36:41,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 109 transitions, 961 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-02-05 10:36:41,450 INFO L231 Difference]: Finished difference. Result has 92 places, 76 transitions, 706 flow [2024-02-05 10:36:41,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=706, PETRI_PLACES=92, PETRI_TRANSITIONS=76} [2024-02-05 10:36:41,451 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 39 predicate places. [2024-02-05 10:36:41,451 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 76 transitions, 706 flow [2024-02-05 10:36:41,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.444444444444443) internal successors, (211), 9 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:41,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:41,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:41,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-02-05 10:36:41,452 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:41,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:41,453 INFO L85 PathProgramCache]: Analyzing trace with hash -983781606, now seen corresponding path program 12 times [2024-02-05 10:36:41,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:41,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083070886] [2024-02-05 10:36:41,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:41,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:41,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:41,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:41,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083070886] [2024-02-05 10:36:41,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083070886] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:41,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:41,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-05 10:36:41,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287786540] [2024-02-05 10:36:41,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:41,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-05 10:36:41,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:41,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-05 10:36:41,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-02-05 10:36:41,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-02-05 10:36:41,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 76 transitions, 706 flow. Second operand has 9 states, 9 states have (on average 23.444444444444443) internal successors, (211), 9 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:41,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:41,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-02-05 10:36:41,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:41,990 INFO L124 PetriNetUnfolderBase]: 288/589 cut-off events. [2024-02-05 10:36:41,990 INFO L125 PetriNetUnfolderBase]: For 3403/3481 co-relation queries the response was YES. [2024-02-05 10:36:41,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2454 conditions, 589 events. 288/589 cut-off events. For 3403/3481 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2798 event pairs, 39 based on Foata normal form. 19/597 useless extension candidates. Maximal degree in co-relation 2424. Up to 133 conditions per place. [2024-02-05 10:36:41,996 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 64 selfloop transitions, 23 changer transitions 11/108 dead transitions. [2024-02-05 10:36:41,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 108 transitions, 1048 flow [2024-02-05 10:36:41,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-05 10:36:41,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-05 10:36:41,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2024-02-05 10:36:41,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324947589098532 [2024-02-05 10:36:41,997 INFO L175 Difference]: Start difference. First operand has 92 places, 76 transitions, 706 flow. Second operand 9 states and 254 transitions. [2024-02-05 10:36:41,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 108 transitions, 1048 flow [2024-02-05 10:36:42,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 108 transitions, 976 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-02-05 10:36:42,011 INFO L231 Difference]: Finished difference. Result has 93 places, 77 transitions, 702 flow [2024-02-05 10:36:42,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=702, PETRI_PLACES=93, PETRI_TRANSITIONS=77} [2024-02-05 10:36:42,013 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 40 predicate places. [2024-02-05 10:36:42,013 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 77 transitions, 702 flow [2024-02-05 10:36:42,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.444444444444443) internal successors, (211), 9 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:42,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:42,013 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, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:42,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-02-05 10:36:42,014 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:42,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:42,014 INFO L85 PathProgramCache]: Analyzing trace with hash 445701867, now seen corresponding path program 1 times [2024-02-05 10:36:42,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:42,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156101226] [2024-02-05 10:36:42,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:42,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:42,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:42,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156101226] [2024-02-05 10:36:42,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156101226] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:42,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:42,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-05 10:36:42,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693443409] [2024-02-05 10:36:42,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:42,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:36:42,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:42,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:36:42,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-05 10:36:42,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-02-05 10:36:42,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 77 transitions, 702 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:42,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:42,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-02-05 10:36:42,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:42,338 INFO L124 PetriNetUnfolderBase]: 686/1262 cut-off events. [2024-02-05 10:36:42,338 INFO L125 PetriNetUnfolderBase]: For 5128/5128 co-relation queries the response was YES. [2024-02-05 10:36:42,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5000 conditions, 1262 events. 686/1262 cut-off events. For 5128/5128 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6702 event pairs, 105 based on Foata normal form. 28/1290 useless extension candidates. Maximal degree in co-relation 4966. Up to 427 conditions per place. [2024-02-05 10:36:42,350 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 127 selfloop transitions, 34 changer transitions 0/164 dead transitions. [2024-02-05 10:36:42,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 164 transitions, 1759 flow [2024-02-05 10:36:42,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-05 10:36:42,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-05 10:36:42,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-02-05 10:36:42,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306603773584906 [2024-02-05 10:36:42,352 INFO L175 Difference]: Start difference. First operand has 93 places, 77 transitions, 702 flow. Second operand 8 states and 225 transitions. [2024-02-05 10:36:42,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 164 transitions, 1759 flow [2024-02-05 10:36:42,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 164 transitions, 1627 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-02-05 10:36:42,368 INFO L231 Difference]: Finished difference. Result has 95 places, 95 transitions, 924 flow [2024-02-05 10:36:42,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=924, PETRI_PLACES=95, PETRI_TRANSITIONS=95} [2024-02-05 10:36:42,369 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 42 predicate places. [2024-02-05 10:36:42,369 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 95 transitions, 924 flow [2024-02-05 10:36:42,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:42,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:42,370 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, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:42,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-02-05 10:36:42,370 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:42,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:42,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1956027757, now seen corresponding path program 2 times [2024-02-05 10:36:42,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:42,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137456811] [2024-02-05 10:36:42,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:42,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:42,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:42,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:42,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137456811] [2024-02-05 10:36:42,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137456811] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:42,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:42,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-05 10:36:42,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233363344] [2024-02-05 10:36:42,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:42,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:36:42,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:42,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:36:42,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-05 10:36:42,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-02-05 10:36:42,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 95 transitions, 924 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:42,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:42,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-02-05 10:36:42,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:42,722 INFO L124 PetriNetUnfolderBase]: 858/1610 cut-off events. [2024-02-05 10:36:42,722 INFO L125 PetriNetUnfolderBase]: For 7933/7933 co-relation queries the response was YES. [2024-02-05 10:36:42,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6815 conditions, 1610 events. 858/1610 cut-off events. For 7933/7933 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9140 event pairs, 129 based on Foata normal form. 32/1642 useless extension candidates. Maximal degree in co-relation 6524. Up to 700 conditions per place. [2024-02-05 10:36:42,746 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 117 selfloop transitions, 26 changer transitions 6/152 dead transitions. [2024-02-05 10:36:42,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 152 transitions, 1681 flow [2024-02-05 10:36:42,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-05 10:36:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-05 10:36:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-02-05 10:36:42,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5723270440251572 [2024-02-05 10:36:42,747 INFO L175 Difference]: Start difference. First operand has 95 places, 95 transitions, 924 flow. Second operand 6 states and 182 transitions. [2024-02-05 10:36:42,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 152 transitions, 1681 flow [2024-02-05 10:36:42,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 152 transitions, 1655 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-02-05 10:36:42,771 INFO L231 Difference]: Finished difference. Result has 103 places, 102 transitions, 1128 flow [2024-02-05 10:36:42,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1128, PETRI_PLACES=103, PETRI_TRANSITIONS=102} [2024-02-05 10:36:42,772 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 50 predicate places. [2024-02-05 10:36:42,772 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 102 transitions, 1128 flow [2024-02-05 10:36:42,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:42,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:42,773 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, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:42,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-02-05 10:36:42,773 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:42,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:42,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1447445541, now seen corresponding path program 3 times [2024-02-05 10:36:42,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:42,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9599239] [2024-02-05 10:36:42,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:42,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:42,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:42,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9599239] [2024-02-05 10:36:42,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9599239] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:42,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511398886] [2024-02-05 10:36:42,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:36:42,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:42,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:42,828 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:42,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-05 10:36:42,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-05 10:36:42,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:42,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-05 10:36:42,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:43,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:43,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511398886] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:43,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-05 10:36:43,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2024-02-05 10:36:43,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168943254] [2024-02-05 10:36:43,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:43,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:36:43,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:43,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:36:43,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-05 10:36:43,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-02-05 10:36:43,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 102 transitions, 1128 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:43,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:43,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-02-05 10:36:43,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:43,456 INFO L124 PetriNetUnfolderBase]: 965/1809 cut-off events. [2024-02-05 10:36:43,456 INFO L125 PetriNetUnfolderBase]: For 11110/11110 co-relation queries the response was YES. [2024-02-05 10:36:43,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7943 conditions, 1809 events. 965/1809 cut-off events. For 11110/11110 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10116 event pairs, 101 based on Foata normal form. 14/1823 useless extension candidates. Maximal degree in co-relation 7652. Up to 709 conditions per place. [2024-02-05 10:36:43,471 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 94 selfloop transitions, 59 changer transitions 2/158 dead transitions. [2024-02-05 10:36:43,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 158 transitions, 1854 flow [2024-02-05 10:36:43,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-05 10:36:43,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-05 10:36:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-02-05 10:36:43,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691823899371069 [2024-02-05 10:36:43,472 INFO L175 Difference]: Start difference. First operand has 103 places, 102 transitions, 1128 flow. Second operand 6 states and 181 transitions. [2024-02-05 10:36:43,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 158 transitions, 1854 flow [2024-02-05 10:36:43,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 158 transitions, 1749 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-02-05 10:36:43,501 INFO L231 Difference]: Finished difference. Result has 104 places, 120 transitions, 1452 flow [2024-02-05 10:36:43,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1452, PETRI_PLACES=104, PETRI_TRANSITIONS=120} [2024-02-05 10:36:43,502 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 51 predicate places. [2024-02-05 10:36:43,502 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 120 transitions, 1452 flow [2024-02-05 10:36:43,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:43,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:43,502 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, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:43,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-05 10:36:43,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-02-05 10:36:43,717 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:43,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:43,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1175600620, now seen corresponding path program 1 times [2024-02-05 10:36:43,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:43,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256749236] [2024-02-05 10:36:43,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:43,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:43,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:43,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256749236] [2024-02-05 10:36:43,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256749236] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:43,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151919270] [2024-02-05 10:36:43,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:43,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:43,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:43,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:43,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-05 10:36:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:43,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-05 10:36:43,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:43,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:43,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151919270] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:43,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-05 10:36:43,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2024-02-05 10:36:43,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832532725] [2024-02-05 10:36:43,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:43,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:36:43,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:43,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:36:43,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-02-05 10:36:43,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-02-05 10:36:43,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 120 transitions, 1452 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:43,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:43,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-02-05 10:36:43,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:44,356 INFO L124 PetriNetUnfolderBase]: 1070/2063 cut-off events. [2024-02-05 10:36:44,356 INFO L125 PetriNetUnfolderBase]: For 15041/15047 co-relation queries the response was YES. [2024-02-05 10:36:44,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10086 conditions, 2063 events. 1070/2063 cut-off events. For 15041/15047 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12256 event pairs, 197 based on Foata normal form. 64/2123 useless extension candidates. Maximal degree in co-relation 9676. Up to 570 conditions per place. [2024-02-05 10:36:44,373 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 172 selfloop transitions, 44 changer transitions 5/224 dead transitions. [2024-02-05 10:36:44,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 224 transitions, 2821 flow [2024-02-05 10:36:44,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-05 10:36:44,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-05 10:36:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 203 transitions. [2024-02-05 10:36:44,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6383647798742138 [2024-02-05 10:36:44,375 INFO L175 Difference]: Start difference. First operand has 104 places, 120 transitions, 1452 flow. Second operand 6 states and 203 transitions. [2024-02-05 10:36:44,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 224 transitions, 2821 flow [2024-02-05 10:36:44,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 224 transitions, 2806 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-02-05 10:36:44,412 INFO L231 Difference]: Finished difference. Result has 112 places, 139 transitions, 1849 flow [2024-02-05 10:36:44,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1849, PETRI_PLACES=112, PETRI_TRANSITIONS=139} [2024-02-05 10:36:44,413 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 59 predicate places. [2024-02-05 10:36:44,413 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 139 transitions, 1849 flow [2024-02-05 10:36:44,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:44,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:44,414 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, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:44,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:44,635 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,SelfDestructingSolverStorable25 [2024-02-05 10:36:44,635 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:44,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:44,636 INFO L85 PathProgramCache]: Analyzing trace with hash -790080410, now seen corresponding path program 2 times [2024-02-05 10:36:44,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:44,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197260859] [2024-02-05 10:36:44,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:44,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:44,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:44,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:44,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197260859] [2024-02-05 10:36:44,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197260859] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:44,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:44,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-05 10:36:44,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365687470] [2024-02-05 10:36:44,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:44,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:36:44,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:44,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:36:44,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-05 10:36:44,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-02-05 10:36:44,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 139 transitions, 1849 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:44,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:44,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-02-05 10:36:44,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:45,146 INFO L124 PetriNetUnfolderBase]: 1067/2050 cut-off events. [2024-02-05 10:36:45,147 INFO L125 PetriNetUnfolderBase]: For 19061/19067 co-relation queries the response was YES. [2024-02-05 10:36:45,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11385 conditions, 2050 events. 1067/2050 cut-off events. For 19061/19067 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12123 event pairs, 203 based on Foata normal form. 18/2064 useless extension candidates. Maximal degree in co-relation 10884. Up to 536 conditions per place. [2024-02-05 10:36:45,165 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 164 selfloop transitions, 34 changer transitions 16/217 dead transitions. [2024-02-05 10:36:45,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 217 transitions, 3107 flow [2024-02-05 10:36:45,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-05 10:36:45,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-05 10:36:45,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-02-05 10:36:45,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606469002695418 [2024-02-05 10:36:45,166 INFO L175 Difference]: Start difference. First operand has 112 places, 139 transitions, 1849 flow. Second operand 7 states and 208 transitions. [2024-02-05 10:36:45,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 217 transitions, 3107 flow [2024-02-05 10:36:45,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 217 transitions, 3010 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-02-05 10:36:45,220 INFO L231 Difference]: Finished difference. Result has 119 places, 145 transitions, 2005 flow [2024-02-05 10:36:45,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1761, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2005, PETRI_PLACES=119, PETRI_TRANSITIONS=145} [2024-02-05 10:36:45,220 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 66 predicate places. [2024-02-05 10:36:45,221 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 145 transitions, 2005 flow [2024-02-05 10:36:45,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:45,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:45,221 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, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:45,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-02-05 10:36:45,221 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:45,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:45,222 INFO L85 PathProgramCache]: Analyzing trace with hash 220269172, now seen corresponding path program 3 times [2024-02-05 10:36:45,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:45,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200757830] [2024-02-05 10:36:45,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:45,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:45,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:45,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200757830] [2024-02-05 10:36:45,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200757830] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:45,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:45,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-05 10:36:45,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122300668] [2024-02-05 10:36:45,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:45,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:36:45,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:45,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:36:45,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-05 10:36:45,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-02-05 10:36:45,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 145 transitions, 2005 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:45,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:45,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-02-05 10:36:45,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:45,767 INFO L124 PetriNetUnfolderBase]: 1063/2010 cut-off events. [2024-02-05 10:36:45,768 INFO L125 PetriNetUnfolderBase]: For 19253/19259 co-relation queries the response was YES. [2024-02-05 10:36:45,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11211 conditions, 2010 events. 1063/2010 cut-off events. For 19253/19259 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11584 event pairs, 213 based on Foata normal form. 10/2016 useless extension candidates. Maximal degree in co-relation 10692. Up to 540 conditions per place. [2024-02-05 10:36:45,788 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 186 selfloop transitions, 37 changer transitions 10/236 dead transitions. [2024-02-05 10:36:45,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 236 transitions, 3336 flow [2024-02-05 10:36:45,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-05 10:36:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-05 10:36:45,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 246 transitions. [2024-02-05 10:36:45,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801886792452831 [2024-02-05 10:36:45,790 INFO L175 Difference]: Start difference. First operand has 119 places, 145 transitions, 2005 flow. Second operand 8 states and 246 transitions. [2024-02-05 10:36:45,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 236 transitions, 3336 flow [2024-02-05 10:36:45,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 236 transitions, 3158 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-02-05 10:36:45,851 INFO L231 Difference]: Finished difference. Result has 127 places, 151 transitions, 2128 flow [2024-02-05 10:36:45,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2128, PETRI_PLACES=127, PETRI_TRANSITIONS=151} [2024-02-05 10:36:45,855 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 74 predicate places. [2024-02-05 10:36:45,856 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 151 transitions, 2128 flow [2024-02-05 10:36:45,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:45,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:45,856 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, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:45,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-02-05 10:36:45,856 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:45,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:45,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1222399159, now seen corresponding path program 4 times [2024-02-05 10:36:45,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:45,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552371717] [2024-02-05 10:36:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:45,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:45,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:45,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552371717] [2024-02-05 10:36:45,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552371717] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:45,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57726154] [2024-02-05 10:36:45,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-05 10:36:45,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:45,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:45,910 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:45,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-05 10:36:45,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-05 10:36:45,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:45,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-05 10:36:45,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:46,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:46,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57726154] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:46,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-05 10:36:46,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2024-02-05 10:36:46,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514101358] [2024-02-05 10:36:46,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:46,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:36:46,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:46,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:36:46,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-02-05 10:36:46,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-02-05 10:36:46,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 151 transitions, 2128 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:46,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:46,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-02-05 10:36:46,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:46,532 INFO L124 PetriNetUnfolderBase]: 1201/2321 cut-off events. [2024-02-05 10:36:46,532 INFO L125 PetriNetUnfolderBase]: For 23835/23841 co-relation queries the response was YES. [2024-02-05 10:36:46,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12818 conditions, 2321 events. 1201/2321 cut-off events. For 23835/23841 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14066 event pairs, 237 based on Foata normal form. 72/2389 useless extension candidates. Maximal degree in co-relation 12270. Up to 772 conditions per place. [2024-02-05 10:36:46,547 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 168 selfloop transitions, 71 changer transitions 4/246 dead transitions. [2024-02-05 10:36:46,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 246 transitions, 3705 flow [2024-02-05 10:36:46,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-05 10:36:46,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-05 10:36:46,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 200 transitions. [2024-02-05 10:36:46,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6289308176100629 [2024-02-05 10:36:46,549 INFO L175 Difference]: Start difference. First operand has 127 places, 151 transitions, 2128 flow. Second operand 6 states and 200 transitions. [2024-02-05 10:36:46,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 246 transitions, 3705 flow [2024-02-05 10:36:46,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 246 transitions, 3597 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-02-05 10:36:46,612 INFO L231 Difference]: Finished difference. Result has 135 places, 175 transitions, 2777 flow [2024-02-05 10:36:46,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2067, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2777, PETRI_PLACES=135, PETRI_TRANSITIONS=175} [2024-02-05 10:36:46,614 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 82 predicate places. [2024-02-05 10:36:46,615 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 175 transitions, 2777 flow [2024-02-05 10:36:46,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:46,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:46,615 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, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:46,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:46,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-02-05 10:36:46,830 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:46,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:46,830 INFO L85 PathProgramCache]: Analyzing trace with hash 242005675, now seen corresponding path program 5 times [2024-02-05 10:36:46,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:46,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898434469] [2024-02-05 10:36:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:46,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:46,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:46,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898434469] [2024-02-05 10:36:46,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898434469] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:46,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:46,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-05 10:36:46,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488233908] [2024-02-05 10:36:46,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:46,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:36:46,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:46,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:36:46,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-05 10:36:46,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-02-05 10:36:46,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 175 transitions, 2777 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:46,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:46,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-02-05 10:36:46,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:47,417 INFO L124 PetriNetUnfolderBase]: 1278/2462 cut-off events. [2024-02-05 10:36:47,417 INFO L125 PetriNetUnfolderBase]: For 29407/29413 co-relation queries the response was YES. [2024-02-05 10:36:47,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15052 conditions, 2462 events. 1278/2462 cut-off events. For 29407/29413 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 15080 event pairs, 251 based on Foata normal form. 12/2470 useless extension candidates. Maximal degree in co-relation 14176. Up to 608 conditions per place. [2024-02-05 10:36:47,437 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 195 selfloop transitions, 61 changer transitions 12/271 dead transitions. [2024-02-05 10:36:47,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 271 transitions, 4446 flow [2024-02-05 10:36:47,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-05 10:36:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-05 10:36:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-02-05 10:36:47,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5683962264150944 [2024-02-05 10:36:47,439 INFO L175 Difference]: Start difference. First operand has 135 places, 175 transitions, 2777 flow. Second operand 8 states and 241 transitions. [2024-02-05 10:36:47,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 271 transitions, 4446 flow [2024-02-05 10:36:47,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 271 transitions, 4358 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-02-05 10:36:47,519 INFO L231 Difference]: Finished difference. Result has 144 places, 190 transitions, 3195 flow [2024-02-05 10:36:47,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2700, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3195, PETRI_PLACES=144, PETRI_TRANSITIONS=190} [2024-02-05 10:36:47,520 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 91 predicate places. [2024-02-05 10:36:47,520 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 190 transitions, 3195 flow [2024-02-05 10:36:47,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:47,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:47,521 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, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:47,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-02-05 10:36:47,521 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:47,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:47,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1897392677, now seen corresponding path program 6 times [2024-02-05 10:36:47,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:47,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421873962] [2024-02-05 10:36:47,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:47,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:47,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:47,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421873962] [2024-02-05 10:36:47,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421873962] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:47,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:47,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-05 10:36:47,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025454961] [2024-02-05 10:36:47,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:47,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:36:47,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:47,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:36:47,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-05 10:36:47,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-02-05 10:36:47,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 190 transitions, 3195 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:47,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:47,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-02-05 10:36:47,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:48,032 INFO L124 PetriNetUnfolderBase]: 1226/2313 cut-off events. [2024-02-05 10:36:48,032 INFO L125 PetriNetUnfolderBase]: For 29272/29278 co-relation queries the response was YES. [2024-02-05 10:36:48,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14517 conditions, 2313 events. 1226/2313 cut-off events. For 29272/29278 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13683 event pairs, 301 based on Foata normal form. 4/2313 useless extension candidates. Maximal degree in co-relation 13696. Up to 1214 conditions per place. [2024-02-05 10:36:48,050 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 162 selfloop transitions, 46 changer transitions 12/223 dead transitions. [2024-02-05 10:36:48,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 223 transitions, 3912 flow [2024-02-05 10:36:48,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-05 10:36:48,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-05 10:36:48,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-02-05 10:36:48,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121293800539084 [2024-02-05 10:36:48,051 INFO L175 Difference]: Start difference. First operand has 144 places, 190 transitions, 3195 flow. Second operand 7 states and 190 transitions. [2024-02-05 10:36:48,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 223 transitions, 3912 flow [2024-02-05 10:36:48,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 223 transitions, 3793 flow, removed 44 selfloop flow, removed 1 redundant places. [2024-02-05 10:36:48,136 INFO L231 Difference]: Finished difference. Result has 150 places, 186 transitions, 3112 flow [2024-02-05 10:36:48,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3055, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3112, PETRI_PLACES=150, PETRI_TRANSITIONS=186} [2024-02-05 10:36:48,137 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 97 predicate places. [2024-02-05 10:36:48,137 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 186 transitions, 3112 flow [2024-02-05 10:36:48,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:48,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:48,138 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, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:48,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-02-05 10:36:48,138 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:48,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:48,138 INFO L85 PathProgramCache]: Analyzing trace with hash -207877680, now seen corresponding path program 4 times [2024-02-05 10:36:48,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:48,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337639430] [2024-02-05 10:36:48,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:48,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:48,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:48,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337639430] [2024-02-05 10:36:48,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337639430] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:48,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:48,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-05 10:36:48,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107401628] [2024-02-05 10:36:48,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:48,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:36:48,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:48,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:36:48,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-05 10:36:48,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-02-05 10:36:48,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 186 transitions, 3112 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:48,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:48,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-02-05 10:36:48,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:48,615 INFO L124 PetriNetUnfolderBase]: 1048/2020 cut-off events. [2024-02-05 10:36:48,615 INFO L125 PetriNetUnfolderBase]: For 26612/26624 co-relation queries the response was YES. [2024-02-05 10:36:48,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12551 conditions, 2020 events. 1048/2020 cut-off events. For 26612/26624 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11829 event pairs, 139 based on Foata normal form. 64/2076 useless extension candidates. Maximal degree in co-relation 11941. Up to 1088 conditions per place. [2024-02-05 10:36:48,634 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 169 selfloop transitions, 66 changer transitions 7/245 dead transitions. [2024-02-05 10:36:48,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 245 transitions, 4181 flow [2024-02-05 10:36:48,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-05 10:36:48,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-05 10:36:48,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-02-05 10:36:48,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606469002695418 [2024-02-05 10:36:48,636 INFO L175 Difference]: Start difference. First operand has 150 places, 186 transitions, 3112 flow. Second operand 7 states and 208 transitions. [2024-02-05 10:36:48,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 245 transitions, 4181 flow [2024-02-05 10:36:48,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 245 transitions, 4051 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-02-05 10:36:48,706 INFO L231 Difference]: Finished difference. Result has 152 places, 192 transitions, 3246 flow [2024-02-05 10:36:48,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2876, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3246, PETRI_PLACES=152, PETRI_TRANSITIONS=192} [2024-02-05 10:36:48,707 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 99 predicate places. [2024-02-05 10:36:48,707 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 192 transitions, 3246 flow [2024-02-05 10:36:48,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:48,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:48,707 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, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:48,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-02-05 10:36:48,708 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:48,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:48,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1051078684, now seen corresponding path program 5 times [2024-02-05 10:36:48,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:48,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338516299] [2024-02-05 10:36:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:48,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:48,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:48,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338516299] [2024-02-05 10:36:48,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338516299] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:48,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:48,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-05 10:36:48,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824022753] [2024-02-05 10:36:48,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:48,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:36:48,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:48,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:36:48,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-05 10:36:48,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-02-05 10:36:48,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 192 transitions, 3246 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:48,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:48,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-02-05 10:36:48,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:49,218 INFO L124 PetriNetUnfolderBase]: 930/1772 cut-off events. [2024-02-05 10:36:49,218 INFO L125 PetriNetUnfolderBase]: For 24914/24917 co-relation queries the response was YES. [2024-02-05 10:36:49,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11631 conditions, 1772 events. 930/1772 cut-off events. For 24914/24917 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9950 event pairs, 123 based on Foata normal form. 32/1802 useless extension candidates. Maximal degree in co-relation 11400. Up to 598 conditions per place. [2024-02-05 10:36:49,233 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 190 selfloop transitions, 32 changer transitions 5/230 dead transitions. [2024-02-05 10:36:49,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 230 transitions, 4032 flow [2024-02-05 10:36:49,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-05 10:36:49,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-05 10:36:49,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-02-05 10:36:49,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691823899371069 [2024-02-05 10:36:49,234 INFO L175 Difference]: Start difference. First operand has 152 places, 192 transitions, 3246 flow. Second operand 6 states and 181 transitions. [2024-02-05 10:36:49,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 230 transitions, 4032 flow [2024-02-05 10:36:49,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 230 transitions, 3909 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-02-05 10:36:49,291 INFO L231 Difference]: Finished difference. Result has 154 places, 182 transitions, 3015 flow [2024-02-05 10:36:49,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3011, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3015, PETRI_PLACES=154, PETRI_TRANSITIONS=182} [2024-02-05 10:36:49,292 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 101 predicate places. [2024-02-05 10:36:49,292 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 182 transitions, 3015 flow [2024-02-05 10:36:49,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:49,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:49,292 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, 1, 1, 1, 1, 1] [2024-02-05 10:36:49,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-02-05 10:36:49,293 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:49,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:49,293 INFO L85 PathProgramCache]: Analyzing trace with hash 852929487, now seen corresponding path program 1 times [2024-02-05 10:36:49,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:49,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039169966] [2024-02-05 10:36:49,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:49,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:49,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:49,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039169966] [2024-02-05 10:36:49,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039169966] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:49,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136448408] [2024-02-05 10:36:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:49,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:49,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:49,438 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:49,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-05 10:36:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:49,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-05 10:36:49,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:49,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:49,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136448408] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:49,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:49,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-02-05 10:36:49,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671902809] [2024-02-05 10:36:49,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:49,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-05 10:36:49,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:49,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-05 10:36:49,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-02-05 10:36:50,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-02-05 10:36:50,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 182 transitions, 3015 flow. Second operand has 22 states, 22 states have (on average 18.545454545454547) internal successors, (408), 22 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:50,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:50,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-02-05 10:36:50,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:51,312 INFO L124 PetriNetUnfolderBase]: 1297/2473 cut-off events. [2024-02-05 10:36:51,313 INFO L125 PetriNetUnfolderBase]: For 31818/31818 co-relation queries the response was YES. [2024-02-05 10:36:51,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15587 conditions, 2473 events. 1297/2473 cut-off events. For 31818/31818 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14781 event pairs, 71 based on Foata normal form. 6/2479 useless extension candidates. Maximal degree in co-relation 14903. Up to 515 conditions per place. [2024-02-05 10:36:51,341 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 164 selfloop transitions, 193 changer transitions 20/380 dead transitions. [2024-02-05 10:36:51,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 380 transitions, 6275 flow [2024-02-05 10:36:51,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-05 10:36:51,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-05 10:36:51,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 496 transitions. [2024-02-05 10:36:51,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44564240790655885 [2024-02-05 10:36:51,344 INFO L175 Difference]: Start difference. First operand has 154 places, 182 transitions, 3015 flow. Second operand 21 states and 496 transitions. [2024-02-05 10:36:51,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 380 transitions, 6275 flow [2024-02-05 10:36:51,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 380 transitions, 6104 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-02-05 10:36:51,420 INFO L231 Difference]: Finished difference. Result has 180 places, 282 transitions, 5348 flow [2024-02-05 10:36:51,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2916, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5348, PETRI_PLACES=180, PETRI_TRANSITIONS=282} [2024-02-05 10:36:51,421 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 127 predicate places. [2024-02-05 10:36:51,421 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 282 transitions, 5348 flow [2024-02-05 10:36:51,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 18.545454545454547) internal successors, (408), 22 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:51,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:51,421 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, 1, 1, 1, 1, 1] [2024-02-05 10:36:51,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:51,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:51,623 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:51,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:51,623 INFO L85 PathProgramCache]: Analyzing trace with hash -543534797, now seen corresponding path program 2 times [2024-02-05 10:36:51,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:51,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962506043] [2024-02-05 10:36:51,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:51,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:51,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:51,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962506043] [2024-02-05 10:36:51,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962506043] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:51,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784852340] [2024-02-05 10:36:51,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:36:51,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:51,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:51,818 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:51,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-05 10:36:51,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:36:51,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:51,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-05 10:36:51,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:52,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:52,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784852340] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:52,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:52,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-02-05 10:36:52,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882528163] [2024-02-05 10:36:52,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:52,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-05 10:36:52,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:52,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-05 10:36:52,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-02-05 10:36:52,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-02-05 10:36:52,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 282 transitions, 5348 flow. Second operand has 22 states, 22 states have (on average 18.454545454545453) internal successors, (406), 22 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:52,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:52,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-02-05 10:36:52,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:53,546 INFO L124 PetriNetUnfolderBase]: 1248/2368 cut-off events. [2024-02-05 10:36:53,546 INFO L125 PetriNetUnfolderBase]: For 39090/39090 co-relation queries the response was YES. [2024-02-05 10:36:53,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17172 conditions, 2368 events. 1248/2368 cut-off events. For 39090/39090 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13985 event pairs, 73 based on Foata normal form. 3/2371 useless extension candidates. Maximal degree in co-relation 17075. Up to 462 conditions per place. [2024-02-05 10:36:53,572 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 122 selfloop transitions, 174 changer transitions 66/365 dead transitions. [2024-02-05 10:36:53,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 365 transitions, 6739 flow [2024-02-05 10:36:53,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-02-05 10:36:53,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-02-05 10:36:53,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 422 transitions. [2024-02-05 10:36:53,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44234800838574423 [2024-02-05 10:36:53,580 INFO L175 Difference]: Start difference. First operand has 180 places, 282 transitions, 5348 flow. Second operand 18 states and 422 transitions. [2024-02-05 10:36:53,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 365 transitions, 6739 flow [2024-02-05 10:36:53,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 365 transitions, 6502 flow, removed 101 selfloop flow, removed 4 redundant places. [2024-02-05 10:36:53,678 INFO L231 Difference]: Finished difference. Result has 195 places, 258 transitions, 5076 flow [2024-02-05 10:36:53,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=5132, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5076, PETRI_PLACES=195, PETRI_TRANSITIONS=258} [2024-02-05 10:36:53,679 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 142 predicate places. [2024-02-05 10:36:53,679 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 258 transitions, 5076 flow [2024-02-05 10:36:53,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 18.454545454545453) internal successors, (406), 22 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:53,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:53,680 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, 1, 1, 1, 1, 1] [2024-02-05 10:36:53,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:53,880 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,SelfDestructingSolverStorable34 [2024-02-05 10:36:53,880 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:53,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:53,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1550209047, now seen corresponding path program 3 times [2024-02-05 10:36:53,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:53,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367304875] [2024-02-05 10:36:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:53,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:54,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:54,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367304875] [2024-02-05 10:36:54,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367304875] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:54,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704322998] [2024-02-05 10:36:54,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:36:54,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:54,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:54,056 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:54,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-05 10:36:54,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-05 10:36:54,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:54,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-05 10:36:54,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:54,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:54,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704322998] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:54,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:54,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-02-05 10:36:54,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145491767] [2024-02-05 10:36:54,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:54,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-05 10:36:54,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:54,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-05 10:36:54,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-02-05 10:36:54,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-02-05 10:36:54,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 258 transitions, 5076 flow. Second operand has 22 states, 22 states have (on average 18.545454545454547) internal successors, (408), 22 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:54,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:54,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-02-05 10:36:54,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:56,154 INFO L124 PetriNetUnfolderBase]: 1055/2029 cut-off events. [2024-02-05 10:36:56,154 INFO L125 PetriNetUnfolderBase]: For 34189/34189 co-relation queries the response was YES. [2024-02-05 10:36:56,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14930 conditions, 2029 events. 1055/2029 cut-off events. For 34189/34189 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 11670 event pairs, 63 based on Foata normal form. 4/2033 useless extension candidates. Maximal degree in co-relation 14866. Up to 454 conditions per place. [2024-02-05 10:36:56,177 INFO L140 encePairwiseOnDemand]: 35/53 looper letters, 150 selfloop transitions, 184 changer transitions 23/360 dead transitions. [2024-02-05 10:36:56,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 360 transitions, 6718 flow [2024-02-05 10:36:56,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-02-05 10:36:56,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-02-05 10:36:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 565 transitions. [2024-02-05 10:36:56,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42641509433962266 [2024-02-05 10:36:56,184 INFO L175 Difference]: Start difference. First operand has 195 places, 258 transitions, 5076 flow. Second operand 25 states and 565 transitions. [2024-02-05 10:36:56,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 360 transitions, 6718 flow [2024-02-05 10:36:56,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 360 transitions, 6494 flow, removed 26 selfloop flow, removed 12 redundant places. [2024-02-05 10:36:56,271 INFO L231 Difference]: Finished difference. Result has 203 places, 266 transitions, 5463 flow [2024-02-05 10:36:56,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4882, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5463, PETRI_PLACES=203, PETRI_TRANSITIONS=266} [2024-02-05 10:36:56,272 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 150 predicate places. [2024-02-05 10:36:56,272 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 266 transitions, 5463 flow [2024-02-05 10:36:56,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 18.545454545454547) internal successors, (408), 22 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:56,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:56,273 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, 1, 1, 1, 1, 1] [2024-02-05 10:36:56,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:56,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:56,485 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:56,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:56,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1494813421, now seen corresponding path program 4 times [2024-02-05 10:36:56,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:56,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242130477] [2024-02-05 10:36:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:56,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:56,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:56,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242130477] [2024-02-05 10:36:56,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242130477] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:56,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092816575] [2024-02-05 10:36:56,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-05 10:36:56,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:56,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:56,626 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:56,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-05 10:36:56,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-05 10:36:56,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:56,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-05 10:36:56,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:56,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:57,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092816575] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:57,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:57,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-02-05 10:36:57,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721598265] [2024-02-05 10:36:57,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:57,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-05 10:36:57,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:57,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-05 10:36:57,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2024-02-05 10:36:57,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-02-05 10:36:57,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 266 transitions, 5463 flow. Second operand has 22 states, 22 states have (on average 18.545454545454547) internal successors, (408), 22 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:57,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:57,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-02-05 10:36:57,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:58,875 INFO L124 PetriNetUnfolderBase]: 1565/2933 cut-off events. [2024-02-05 10:36:58,876 INFO L125 PetriNetUnfolderBase]: For 57427/57427 co-relation queries the response was YES. [2024-02-05 10:36:58,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23024 conditions, 2933 events. 1565/2933 cut-off events. For 57427/57427 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 18134 event pairs, 71 based on Foata normal form. 19/2952 useless extension candidates. Maximal degree in co-relation 22961. Up to 652 conditions per place. [2024-02-05 10:36:58,904 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 171 selfloop transitions, 191 changer transitions 159/524 dead transitions. [2024-02-05 10:36:58,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 524 transitions, 10674 flow [2024-02-05 10:36:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-02-05 10:36:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-02-05 10:36:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 672 transitions. [2024-02-05 10:36:58,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372153545868575 [2024-02-05 10:36:58,906 INFO L175 Difference]: Start difference. First operand has 203 places, 266 transitions, 5463 flow. Second operand 29 states and 672 transitions. [2024-02-05 10:36:58,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 524 transitions, 10674 flow [2024-02-05 10:36:59,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 524 transitions, 9592 flow, removed 36 selfloop flow, removed 24 redundant places. [2024-02-05 10:36:59,060 INFO L231 Difference]: Finished difference. Result has 215 places, 292 transitions, 5943 flow [2024-02-05 10:36:59,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4820, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5943, PETRI_PLACES=215, PETRI_TRANSITIONS=292} [2024-02-05 10:36:59,061 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 162 predicate places. [2024-02-05 10:36:59,061 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 292 transitions, 5943 flow [2024-02-05 10:36:59,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 18.545454545454547) internal successors, (408), 22 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:59,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:59,062 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, 1, 1, 1, 1, 1] [2024-02-05 10:36:59,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:59,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:59,264 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:36:59,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:59,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1384066873, now seen corresponding path program 5 times [2024-02-05 10:36:59,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:59,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9637871] [2024-02-05 10:36:59,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:59,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:59,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:59,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9637871] [2024-02-05 10:36:59,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9637871] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:59,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061973174] [2024-02-05 10:36:59,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-05 10:36:59,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:59,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:59,397 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:59,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-05 10:36:59,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-05 10:36:59,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:59,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-05 10:36:59,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:59,602 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-05 10:36:59,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061973174] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:59,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-05 10:36:59,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 14 [2024-02-05 10:36:59,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220628392] [2024-02-05 10:36:59,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:59,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-05 10:36:59,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:59,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-05 10:36:59,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-02-05 10:36:59,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-02-05 10:36:59,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 292 transitions, 5943 flow. Second operand has 8 states, 8 states have (on average 23.25) internal successors, (186), 8 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:59,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:59,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-02-05 10:36:59,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:00,153 INFO L124 PetriNetUnfolderBase]: 964/1922 cut-off events. [2024-02-05 10:37:00,153 INFO L125 PetriNetUnfolderBase]: For 38554/38716 co-relation queries the response was YES. [2024-02-05 10:37:00,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14845 conditions, 1922 events. 964/1922 cut-off events. For 38554/38716 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11471 event pairs, 79 based on Foata normal form. 52/1960 useless extension candidates. Maximal degree in co-relation 14774. Up to 620 conditions per place. [2024-02-05 10:37:00,182 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 199 selfloop transitions, 82 changer transitions 18/320 dead transitions. [2024-02-05 10:37:00,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 320 transitions, 6781 flow [2024-02-05 10:37:00,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-05 10:37:00,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-05 10:37:00,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-02-05 10:37:00,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377358490566038 [2024-02-05 10:37:00,183 INFO L175 Difference]: Start difference. First operand has 215 places, 292 transitions, 5943 flow. Second operand 8 states and 228 transitions. [2024-02-05 10:37:00,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 320 transitions, 6781 flow [2024-02-05 10:37:00,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 320 transitions, 6149 flow, removed 106 selfloop flow, removed 22 redundant places. [2024-02-05 10:37:00,304 INFO L231 Difference]: Finished difference. Result has 188 places, 286 transitions, 5486 flow [2024-02-05 10:37:00,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=5344, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5486, PETRI_PLACES=188, PETRI_TRANSITIONS=286} [2024-02-05 10:37:00,305 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 135 predicate places. [2024-02-05 10:37:00,305 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 286 transitions, 5486 flow [2024-02-05 10:37:00,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.25) internal successors, (186), 8 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:00,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:00,305 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, 1, 1, 1, 1, 1] [2024-02-05 10:37:00,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-02-05 10:37:00,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-02-05 10:37:00,507 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:37:00,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:00,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1022315935, now seen corresponding path program 6 times [2024-02-05 10:37:00,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:00,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769596425] [2024-02-05 10:37:00,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:00,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:00,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:00,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769596425] [2024-02-05 10:37:00,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769596425] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:37:00,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731793218] [2024-02-05 10:37:00,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-05 10:37:00,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:00,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:37:00,640 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:37:00,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-05 10:37:00,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-05 10:37:00,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:37:00,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-05 10:37:00,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:37:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:00,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:37:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:01,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731793218] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:37:01,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:37:01,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-02-05 10:37:01,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518129841] [2024-02-05 10:37:01,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:37:01,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-05 10:37:01,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:01,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-05 10:37:01,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-02-05 10:37:01,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-02-05 10:37:01,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 286 transitions, 5486 flow. Second operand has 22 states, 22 states have (on average 18.545454545454547) internal successors, (408), 22 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:01,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:01,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-02-05 10:37:01,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:02,867 INFO L124 PetriNetUnfolderBase]: 1526/2904 cut-off events. [2024-02-05 10:37:02,867 INFO L125 PetriNetUnfolderBase]: For 46077/46077 co-relation queries the response was YES. [2024-02-05 10:37:02,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21410 conditions, 2904 events. 1526/2904 cut-off events. For 46077/46077 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 18373 event pairs, 43 based on Foata normal form. 3/2907 useless extension candidates. Maximal degree in co-relation 21349. Up to 704 conditions per place. [2024-02-05 10:37:02,901 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 129 selfloop transitions, 301 changer transitions 132/565 dead transitions. [2024-02-05 10:37:02,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 565 transitions, 10899 flow [2024-02-05 10:37:02,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-02-05 10:37:02,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-02-05 10:37:02,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 861 transitions. [2024-02-05 10:37:02,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39622641509433965 [2024-02-05 10:37:02,903 INFO L175 Difference]: Start difference. First operand has 188 places, 286 transitions, 5486 flow. Second operand 41 states and 861 transitions. [2024-02-05 10:37:02,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 565 transitions, 10899 flow [2024-02-05 10:37:03,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 565 transitions, 10640 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-02-05 10:37:03,056 INFO L231 Difference]: Finished difference. Result has 224 places, 365 transitions, 7532 flow [2024-02-05 10:37:03,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=5346, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=7532, PETRI_PLACES=224, PETRI_TRANSITIONS=365} [2024-02-05 10:37:03,057 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 171 predicate places. [2024-02-05 10:37:03,057 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 365 transitions, 7532 flow [2024-02-05 10:37:03,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 18.545454545454547) internal successors, (408), 22 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:03,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:03,058 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, 1, 1, 1, 1, 1] [2024-02-05 10:37:03,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-05 10:37:03,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-02-05 10:37:03,271 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:37:03,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:03,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1356431801, now seen corresponding path program 7 times [2024-02-05 10:37:03,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:03,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378047921] [2024-02-05 10:37:03,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:03,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:03,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:03,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378047921] [2024-02-05 10:37:03,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378047921] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:37:03,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935032939] [2024-02-05 10:37:03,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-05 10:37:03,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:03,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:37:03,415 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:37:03,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-05 10:37:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:03,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-05 10:37:03,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:37:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:03,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:37:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:03,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935032939] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:37:03,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:37:03,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-02-05 10:37:03,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021327597] [2024-02-05 10:37:03,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:37:03,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-05 10:37:03,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:03,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-05 10:37:03,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-02-05 10:37:04,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-02-05 10:37:04,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 365 transitions, 7532 flow. Second operand has 22 states, 22 states have (on average 18.363636363636363) internal successors, (404), 22 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:04,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:04,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-02-05 10:37:04,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:06,142 INFO L124 PetriNetUnfolderBase]: 1920/3709 cut-off events. [2024-02-05 10:37:06,142 INFO L125 PetriNetUnfolderBase]: For 66666/66666 co-relation queries the response was YES. [2024-02-05 10:37:06,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28023 conditions, 3709 events. 1920/3709 cut-off events. For 66666/66666 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25232 event pairs, 58 based on Foata normal form. 120/3829 useless extension candidates. Maximal degree in co-relation 27960. Up to 902 conditions per place. [2024-02-05 10:37:06,174 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 171 selfloop transitions, 442 changer transitions 80/696 dead transitions. [2024-02-05 10:37:06,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 696 transitions, 14161 flow [2024-02-05 10:37:06,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-02-05 10:37:06,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-02-05 10:37:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 917 transitions. [2024-02-05 10:37:06,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119496855345912 [2024-02-05 10:37:06,179 INFO L175 Difference]: Start difference. First operand has 224 places, 365 transitions, 7532 flow. Second operand 42 states and 917 transitions. [2024-02-05 10:37:06,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 696 transitions, 14161 flow [2024-02-05 10:37:06,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 696 transitions, 12961 flow, removed 293 selfloop flow, removed 16 redundant places. [2024-02-05 10:37:06,422 INFO L231 Difference]: Finished difference. Result has 258 places, 518 transitions, 11203 flow [2024-02-05 10:37:06,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=6684, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=11203, PETRI_PLACES=258, PETRI_TRANSITIONS=518} [2024-02-05 10:37:06,422 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 205 predicate places. [2024-02-05 10:37:06,423 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 518 transitions, 11203 flow [2024-02-05 10:37:06,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 18.363636363636363) internal successors, (404), 22 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:06,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:06,423 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, 1, 1, 1, 1, 1] [2024-02-05 10:37:06,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-02-05 10:37:06,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-02-05 10:37:06,624 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:37:06,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:06,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1232794027, now seen corresponding path program 8 times [2024-02-05 10:37:06,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:06,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368581776] [2024-02-05 10:37:06,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:06,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:06,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:06,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368581776] [2024-02-05 10:37:06,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368581776] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:37:06,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413965498] [2024-02-05 10:37:06,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:37:06,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:06,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:37:06,769 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:37:06,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-05 10:37:06,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:37:06,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:37:06,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-05 10:37:06,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:37:06,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:06,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:37:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:07,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413965498] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:37:07,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:37:07,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-02-05 10:37:07,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10782757] [2024-02-05 10:37:07,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:37:07,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-05 10:37:07,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:07,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-05 10:37:07,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2024-02-05 10:37:07,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-02-05 10:37:07,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 518 transitions, 11203 flow. Second operand has 23 states, 23 states have (on average 18.782608695652176) internal successors, (432), 23 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:07,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:07,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-02-05 10:37:07,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:09,875 INFO L124 PetriNetUnfolderBase]: 2269/4356 cut-off events. [2024-02-05 10:37:09,875 INFO L125 PetriNetUnfolderBase]: For 83565/83565 co-relation queries the response was YES. [2024-02-05 10:37:09,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34780 conditions, 4356 events. 2269/4356 cut-off events. For 83565/83565 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 29742 event pairs, 56 based on Foata normal form. 26/4382 useless extension candidates. Maximal degree in co-relation 34705. Up to 1134 conditions per place. [2024-02-05 10:37:09,921 INFO L140 encePairwiseOnDemand]: 34/53 looper letters, 245 selfloop transitions, 574 changer transitions 28/850 dead transitions. [2024-02-05 10:37:09,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 850 transitions, 18317 flow [2024-02-05 10:37:09,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-02-05 10:37:09,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-02-05 10:37:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 969 transitions. [2024-02-05 10:37:09,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155231560891938 [2024-02-05 10:37:09,928 INFO L175 Difference]: Start difference. First operand has 258 places, 518 transitions, 11203 flow. Second operand 44 states and 969 transitions. [2024-02-05 10:37:09,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 850 transitions, 18317 flow [2024-02-05 10:37:10,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 850 transitions, 17771 flow, removed 141 selfloop flow, removed 15 redundant places. [2024-02-05 10:37:10,336 INFO L231 Difference]: Finished difference. Result has 294 places, 703 transitions, 16664 flow [2024-02-05 10:37:10,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=10522, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=389, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=16664, PETRI_PLACES=294, PETRI_TRANSITIONS=703} [2024-02-05 10:37:10,337 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 241 predicate places. [2024-02-05 10:37:10,338 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 703 transitions, 16664 flow [2024-02-05 10:37:10,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 18.782608695652176) internal successors, (432), 23 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:10,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:10,338 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, 1, 1, 1, 1, 1] [2024-02-05 10:37:10,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-05 10:37:10,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-02-05 10:37:10,553 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:37:10,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:10,553 INFO L85 PathProgramCache]: Analyzing trace with hash 239861037, now seen corresponding path program 9 times [2024-02-05 10:37:10,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:10,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125316438] [2024-02-05 10:37:10,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:10,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:10,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:10,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125316438] [2024-02-05 10:37:10,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125316438] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:37:10,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417031096] [2024-02-05 10:37:10,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:37:10,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:10,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:37:10,677 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:37:10,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-05 10:37:10,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-05 10:37:10,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:37:10,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-05 10:37:10,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:37:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:10,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:37:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:11,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417031096] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:37:11,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:37:11,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-02-05 10:37:11,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935693928] [2024-02-05 10:37:11,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:37:11,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-05 10:37:11,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:11,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-05 10:37:11,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-02-05 10:37:11,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-02-05 10:37:11,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 703 transitions, 16664 flow. Second operand has 22 states, 22 states have (on average 18.454545454545453) internal successors, (406), 22 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:11,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:11,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-02-05 10:37:11,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:14,066 INFO L124 PetriNetUnfolderBase]: 2579/4926 cut-off events. [2024-02-05 10:37:14,066 INFO L125 PetriNetUnfolderBase]: For 106555/106555 co-relation queries the response was YES. [2024-02-05 10:37:14,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42284 conditions, 4926 events. 2579/4926 cut-off events. For 106555/106555 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 34453 event pairs, 48 based on Foata normal form. 10/4936 useless extension candidates. Maximal degree in co-relation 42203. Up to 1318 conditions per place. [2024-02-05 10:37:14,132 INFO L140 encePairwiseOnDemand]: 34/53 looper letters, 303 selfloop transitions, 578 changer transitions 58/942 dead transitions. [2024-02-05 10:37:14,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 942 transitions, 22275 flow [2024-02-05 10:37:14,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-02-05 10:37:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-02-05 10:37:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 868 transitions. [2024-02-05 10:37:14,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41993226898887276 [2024-02-05 10:37:14,135 INFO L175 Difference]: Start difference. First operand has 294 places, 703 transitions, 16664 flow. Second operand 39 states and 868 transitions. [2024-02-05 10:37:14,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 942 transitions, 22275 flow [2024-02-05 10:37:14,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 942 transitions, 22012 flow, removed 95 selfloop flow, removed 6 redundant places. [2024-02-05 10:37:14,797 INFO L231 Difference]: Finished difference. Result has 334 places, 775 transitions, 20011 flow [2024-02-05 10:37:14,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=16422, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=497, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=20011, PETRI_PLACES=334, PETRI_TRANSITIONS=775} [2024-02-05 10:37:14,799 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 281 predicate places. [2024-02-05 10:37:14,799 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 775 transitions, 20011 flow [2024-02-05 10:37:14,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 18.454545454545453) internal successors, (406), 22 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:14,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:14,800 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, 1, 1, 1, 1, 1] [2024-02-05 10:37:14,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-05 10:37:15,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:15,003 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:37:15,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:15,003 INFO L85 PathProgramCache]: Analyzing trace with hash -900117687, now seen corresponding path program 10 times [2024-02-05 10:37:15,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:15,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173947317] [2024-02-05 10:37:15,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:15,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:15,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:15,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:15,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173947317] [2024-02-05 10:37:15,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173947317] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:37:15,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324747307] [2024-02-05 10:37:15,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-05 10:37:15,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:15,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:37:15,168 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:37:15,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-05 10:37:15,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-05 10:37:15,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:37:15,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-05 10:37:15,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:37:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:15,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:37:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:15,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324747307] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:37:15,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:37:15,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-02-05 10:37:15,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094307891] [2024-02-05 10:37:15,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:37:15,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-05 10:37:15,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:15,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-05 10:37:15,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-02-05 10:37:15,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-02-05 10:37:15,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 775 transitions, 20011 flow. Second operand has 22 states, 22 states have (on average 18.545454545454547) internal successors, (408), 22 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:15,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:15,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-02-05 10:37:15,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:18,130 INFO L124 PetriNetUnfolderBase]: 2601/4924 cut-off events. [2024-02-05 10:37:18,130 INFO L125 PetriNetUnfolderBase]: For 122998/122998 co-relation queries the response was YES. [2024-02-05 10:37:18,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45714 conditions, 4924 events. 2601/4924 cut-off events. For 122998/122998 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33996 event pairs, 52 based on Foata normal form. 2/4926 useless extension candidates. Maximal degree in co-relation 45623. Up to 1260 conditions per place. [2024-02-05 10:37:18,299 INFO L140 encePairwiseOnDemand]: 36/53 looper letters, 258 selfloop transitions, 608 changer transitions 70/939 dead transitions. [2024-02-05 10:37:18,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 939 transitions, 24762 flow [2024-02-05 10:37:18,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-02-05 10:37:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-02-05 10:37:18,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 727 transitions. [2024-02-05 10:37:18,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4156660949113779 [2024-02-05 10:37:18,300 INFO L175 Difference]: Start difference. First operand has 334 places, 775 transitions, 20011 flow. Second operand 33 states and 727 transitions. [2024-02-05 10:37:18,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 939 transitions, 24762 flow [2024-02-05 10:37:18,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 939 transitions, 24483 flow, removed 48 selfloop flow, removed 18 redundant places. [2024-02-05 10:37:18,942 INFO L231 Difference]: Finished difference. Result has 344 places, 795 transitions, 22181 flow [2024-02-05 10:37:18,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=19772, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=545, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=22181, PETRI_PLACES=344, PETRI_TRANSITIONS=795} [2024-02-05 10:37:18,943 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 291 predicate places. [2024-02-05 10:37:18,943 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 795 transitions, 22181 flow [2024-02-05 10:37:18,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 18.545454545454547) internal successors, (408), 22 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:18,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:18,944 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, 1, 1, 1, 1, 1] [2024-02-05 10:37:18,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-05 10:37:19,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-02-05 10:37:19,160 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:37:19,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:19,161 INFO L85 PathProgramCache]: Analyzing trace with hash 854028111, now seen corresponding path program 11 times [2024-02-05 10:37:19,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:19,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934144846] [2024-02-05 10:37:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:19,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:19,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:19,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934144846] [2024-02-05 10:37:19,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934144846] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:37:19,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207570759] [2024-02-05 10:37:19,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-05 10:37:19,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:19,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:37:19,297 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:37:19,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-05 10:37:19,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:37:19,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:37:19,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-05 10:37:19,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:37:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:19,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:37:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:19,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207570759] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:37:19,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:37:19,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 17 [2024-02-05 10:37:19,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476931358] [2024-02-05 10:37:19,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:37:19,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-05 10:37:19,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:19,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-05 10:37:19,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-02-05 10:37:19,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-02-05 10:37:19,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 795 transitions, 22181 flow. Second operand has 18 states, 18 states have (on average 18.72222222222222) internal successors, (337), 18 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:19,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:19,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-02-05 10:37:19,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:22,034 INFO L124 PetriNetUnfolderBase]: 2585/4899 cut-off events. [2024-02-05 10:37:22,034 INFO L125 PetriNetUnfolderBase]: For 140542/140558 co-relation queries the response was YES. [2024-02-05 10:37:22,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47841 conditions, 4899 events. 2585/4899 cut-off events. For 140542/140558 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 33645 event pairs, 67 based on Foata normal form. 3/4897 useless extension candidates. Maximal degree in co-relation 47749. Up to 1206 conditions per place. [2024-02-05 10:37:22,082 INFO L140 encePairwiseOnDemand]: 36/53 looper letters, 101 selfloop transitions, 204 changer transitions 644/952 dead transitions. [2024-02-05 10:37:22,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 952 transitions, 27052 flow [2024-02-05 10:37:22,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-02-05 10:37:22,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-02-05 10:37:22,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 628 transitions. [2024-02-05 10:37:22,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4085881587508133 [2024-02-05 10:37:22,084 INFO L175 Difference]: Start difference. First operand has 344 places, 795 transitions, 22181 flow. Second operand 29 states and 628 transitions. [2024-02-05 10:37:22,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 952 transitions, 27052 flow [2024-02-05 10:37:22,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 952 transitions, 26365 flow, removed 39 selfloop flow, removed 26 redundant places. [2024-02-05 10:37:22,995 INFO L231 Difference]: Finished difference. Result has 344 places, 269 transitions, 7142 flow [2024-02-05 10:37:22,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=21596, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7142, PETRI_PLACES=344, PETRI_TRANSITIONS=269} [2024-02-05 10:37:22,996 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 291 predicate places. [2024-02-05 10:37:22,996 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 269 transitions, 7142 flow [2024-02-05 10:37:22,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 18.72222222222222) internal successors, (337), 18 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:22,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:22,997 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, 1, 1, 1, 1, 1] [2024-02-05 10:37:23,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-02-05 10:37:23,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:23,197 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:37:23,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:23,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1552017017, now seen corresponding path program 12 times [2024-02-05 10:37:23,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:23,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21037068] [2024-02-05 10:37:23,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:23,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:23,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:23,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21037068] [2024-02-05 10:37:23,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21037068] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:37:23,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527075839] [2024-02-05 10:37:23,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-05 10:37:23,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:23,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:37:23,358 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:37:23,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-05 10:37:23,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-05 10:37:23,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:37:23,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-05 10:37:23,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:37:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:23,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:37:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:23,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527075839] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:37:23,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:37:23,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-02-05 10:37:23,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177810779] [2024-02-05 10:37:23,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:37:23,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-05 10:37:23,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:23,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-05 10:37:23,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-02-05 10:37:24,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-02-05 10:37:24,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 269 transitions, 7142 flow. Second operand has 22 states, 22 states have (on average 18.363636363636363) internal successors, (404), 22 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:24,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:24,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-02-05 10:37:24,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:25,974 INFO L124 PetriNetUnfolderBase]: 1191/2695 cut-off events. [2024-02-05 10:37:25,975 INFO L125 PetriNetUnfolderBase]: For 74703/74707 co-relation queries the response was YES. [2024-02-05 10:37:26,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22702 conditions, 2695 events. 1191/2695 cut-off events. For 74703/74707 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18509 event pairs, 41 based on Foata normal form. 9/2703 useless extension candidates. Maximal degree in co-relation 22610. Up to 622 conditions per place. [2024-02-05 10:37:26,022 INFO L140 encePairwiseOnDemand]: 35/53 looper letters, 137 selfloop transitions, 286 changer transitions 90/516 dead transitions. [2024-02-05 10:37:26,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 516 transitions, 12072 flow [2024-02-05 10:37:26,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-02-05 10:37:26,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-02-05 10:37:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 1044 transitions. [2024-02-05 10:37:26,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41037735849056606 [2024-02-05 10:37:26,024 INFO L175 Difference]: Start difference. First operand has 344 places, 269 transitions, 7142 flow. Second operand 48 states and 1044 transitions. [2024-02-05 10:37:26,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 516 transitions, 12072 flow [2024-02-05 10:37:26,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 516 transitions, 8963 flow, removed 231 selfloop flow, removed 70 redundant places. [2024-02-05 10:37:26,293 INFO L231 Difference]: Finished difference. Result has 291 places, 340 transitions, 6980 flow [2024-02-05 10:37:26,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4978, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=6980, PETRI_PLACES=291, PETRI_TRANSITIONS=340} [2024-02-05 10:37:26,294 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 238 predicate places. [2024-02-05 10:37:26,294 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 340 transitions, 6980 flow [2024-02-05 10:37:26,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 18.363636363636363) internal successors, (404), 22 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:26,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:26,294 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, 1, 1, 1, 1, 1] [2024-02-05 10:37:26,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-02-05 10:37:26,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:26,495 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:37:26,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:26,496 INFO L85 PathProgramCache]: Analyzing trace with hash 591312127, now seen corresponding path program 13 times [2024-02-05 10:37:26,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:26,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723149386] [2024-02-05 10:37:26,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:26,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:26,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:26,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723149386] [2024-02-05 10:37:26,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723149386] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:37:26,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103213106] [2024-02-05 10:37:26,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-05 10:37:26,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:26,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:37:26,655 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:37:26,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-05 10:37:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:26,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-05 10:37:26,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:37:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:26,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:37:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:27,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103213106] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:37:27,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:37:27,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-02-05 10:37:27,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846216558] [2024-02-05 10:37:27,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:37:27,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-05 10:37:27,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:27,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-05 10:37:27,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2024-02-05 10:37:27,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-02-05 10:37:27,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 340 transitions, 6980 flow. Second operand has 22 states, 22 states have (on average 18.454545454545453) internal successors, (406), 22 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:27,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:27,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-02-05 10:37:27,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:28,279 INFO L124 PetriNetUnfolderBase]: 1232/2745 cut-off events. [2024-02-05 10:37:28,280 INFO L125 PetriNetUnfolderBase]: For 49274/49278 co-relation queries the response was YES. [2024-02-05 10:37:28,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20192 conditions, 2745 events. 1232/2745 cut-off events. For 49274/49278 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 18851 event pairs, 127 based on Foata normal form. 2/2746 useless extension candidates. Maximal degree in co-relation 20123. Up to 682 conditions per place. [2024-02-05 10:37:28,312 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 121 selfloop transitions, 212 changer transitions 97/433 dead transitions. [2024-02-05 10:37:28,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 433 transitions, 9078 flow [2024-02-05 10:37:28,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-05 10:37:28,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-05 10:37:28,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 431 transitions. [2024-02-05 10:37:28,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4066037735849057 [2024-02-05 10:37:28,314 INFO L175 Difference]: Start difference. First operand has 291 places, 340 transitions, 6980 flow. Second operand 20 states and 431 transitions. [2024-02-05 10:37:28,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 433 transitions, 9078 flow [2024-02-05 10:37:28,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 433 transitions, 8733 flow, removed 82 selfloop flow, removed 16 redundant places. [2024-02-05 10:37:28,512 INFO L231 Difference]: Finished difference. Result has 287 places, 313 transitions, 6735 flow [2024-02-05 10:37:28,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=6700, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6735, PETRI_PLACES=287, PETRI_TRANSITIONS=313} [2024-02-05 10:37:28,512 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 234 predicate places. [2024-02-05 10:37:28,512 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 313 transitions, 6735 flow [2024-02-05 10:37:28,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 18.454545454545453) internal successors, (406), 22 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:28,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:28,513 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, 1, 1, 1, 1, 1] [2024-02-05 10:37:28,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-02-05 10:37:28,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-02-05 10:37:28,713 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:37:28,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:28,714 INFO L85 PathProgramCache]: Analyzing trace with hash 191110147, now seen corresponding path program 14 times [2024-02-05 10:37:28,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:28,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847995000] [2024-02-05 10:37:28,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:28,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:28,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:28,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847995000] [2024-02-05 10:37:28,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847995000] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:37:28,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121998181] [2024-02-05 10:37:28,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:37:28,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:28,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:37:28,835 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:37:28,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-05 10:37:28,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:37:28,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:37:28,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-05 10:37:28,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:37:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:29,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:37:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:29,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121998181] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:37:29,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:37:29,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-02-05 10:37:29,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361304235] [2024-02-05 10:37:29,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:37:29,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-05 10:37:29,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:29,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-05 10:37:29,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2024-02-05 10:37:29,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-02-05 10:37:29,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 313 transitions, 6735 flow. Second operand has 22 states, 22 states have (on average 18.454545454545453) internal successors, (406), 22 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:29,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:29,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-02-05 10:37:29,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:30,385 INFO L124 PetriNetUnfolderBase]: 1069/2456 cut-off events. [2024-02-05 10:37:30,385 INFO L125 PetriNetUnfolderBase]: For 43558/43562 co-relation queries the response was YES. [2024-02-05 10:37:30,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18134 conditions, 2456 events. 1069/2456 cut-off events. For 43558/43562 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16754 event pairs, 101 based on Foata normal form. 4/2459 useless extension candidates. Maximal degree in co-relation 18071. Up to 647 conditions per place. [2024-02-05 10:37:30,402 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 111 selfloop transitions, 189 changer transitions 67/370 dead transitions. [2024-02-05 10:37:30,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 370 transitions, 8008 flow [2024-02-05 10:37:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-05 10:37:30,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-05 10:37:30,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 447 transitions. [2024-02-05 10:37:30,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40161725067385445 [2024-02-05 10:37:30,404 INFO L175 Difference]: Start difference. First operand has 287 places, 313 transitions, 6735 flow. Second operand 21 states and 447 transitions. [2024-02-05 10:37:30,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 370 transitions, 8008 flow [2024-02-05 10:37:30,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 370 transitions, 7816 flow, removed 10 selfloop flow, removed 14 redundant places. [2024-02-05 10:37:30,546 INFO L231 Difference]: Finished difference. Result has 291 places, 279 transitions, 6180 flow [2024-02-05 10:37:30,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=6552, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6180, PETRI_PLACES=291, PETRI_TRANSITIONS=279} [2024-02-05 10:37:30,547 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 238 predicate places. [2024-02-05 10:37:30,547 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 279 transitions, 6180 flow [2024-02-05 10:37:30,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 18.454545454545453) internal successors, (406), 22 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:30,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:30,548 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, 1, 1, 1, 1, 1] [2024-02-05 10:37:30,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-02-05 10:37:30,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:30,761 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:37:30,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:30,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1721909995, now seen corresponding path program 15 times [2024-02-05 10:37:30,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:30,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742455959] [2024-02-05 10:37:30,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:30,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:30,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:30,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742455959] [2024-02-05 10:37:30,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742455959] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:37:30,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242808697] [2024-02-05 10:37:30,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:37:30,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:30,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:37:30,919 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:37:30,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-05 10:37:31,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-05 10:37:31,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:37:31,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-05 10:37:31,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:37:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:31,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:37:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:31,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242808697] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:37:31,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:37:31,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-02-05 10:37:31,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128598960] [2024-02-05 10:37:31,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:37:31,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-05 10:37:31,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:31,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-05 10:37:31,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-02-05 10:37:31,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-02-05 10:37:31,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 279 transitions, 6180 flow. Second operand has 22 states, 22 states have (on average 18.545454545454547) internal successors, (408), 22 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:31,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:31,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-02-05 10:37:31,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:32,185 INFO L124 PetriNetUnfolderBase]: 772/1881 cut-off events. [2024-02-05 10:37:32,186 INFO L125 PetriNetUnfolderBase]: For 35290/35294 co-relation queries the response was YES. [2024-02-05 10:37:32,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14293 conditions, 1881 events. 772/1881 cut-off events. For 35290/35294 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 12291 event pairs, 77 based on Foata normal form. 4/1884 useless extension candidates. Maximal degree in co-relation 14231. Up to 557 conditions per place. [2024-02-05 10:37:32,200 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 90 selfloop transitions, 134 changer transitions 81/308 dead transitions. [2024-02-05 10:37:32,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 308 transitions, 6922 flow [2024-02-05 10:37:32,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-05 10:37:32,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-05 10:37:32,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 344 transitions. [2024-02-05 10:37:32,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4056603773584906 [2024-02-05 10:37:32,202 INFO L175 Difference]: Start difference. First operand has 291 places, 279 transitions, 6180 flow. Second operand 16 states and 344 transitions. [2024-02-05 10:37:32,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 308 transitions, 6922 flow [2024-02-05 10:37:32,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 308 transitions, 6329 flow, removed 9 selfloop flow, removed 25 redundant places. [2024-02-05 10:37:32,294 INFO L231 Difference]: Finished difference. Result has 276 places, 218 transitions, 4398 flow [2024-02-05 10:37:32,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=5593, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4398, PETRI_PLACES=276, PETRI_TRANSITIONS=218} [2024-02-05 10:37:32,295 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 223 predicate places. [2024-02-05 10:37:32,295 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 218 transitions, 4398 flow [2024-02-05 10:37:32,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 18.545454545454547) internal successors, (408), 22 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:32,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:32,296 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, 1, 1, 1, 1, 1] [2024-02-05 10:37:32,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-02-05 10:37:32,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:32,496 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:37:32,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:32,497 INFO L85 PathProgramCache]: Analyzing trace with hash 520070919, now seen corresponding path program 16 times [2024-02-05 10:37:32,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:32,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45128357] [2024-02-05 10:37:32,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:32,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:32,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:32,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45128357] [2024-02-05 10:37:32,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45128357] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:37:32,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374739867] [2024-02-05 10:37:32,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-05 10:37:32,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:32,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:37:32,636 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:37:32,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-02-05 10:37:32,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-05 10:37:32,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:37:32,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-05 10:37:32,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:37:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:32,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:37:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:33,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374739867] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:37:33,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:37:33,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-02-05 10:37:33,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756841843] [2024-02-05 10:37:33,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:37:33,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-05 10:37:33,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:33,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-05 10:37:33,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2024-02-05 10:37:33,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-02-05 10:37:33,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 218 transitions, 4398 flow. Second operand has 23 states, 23 states have (on average 18.695652173913043) internal successors, (430), 23 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:33,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:33,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-02-05 10:37:33,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:33,997 INFO L124 PetriNetUnfolderBase]: 535/1296 cut-off events. [2024-02-05 10:37:33,997 INFO L125 PetriNetUnfolderBase]: For 21377/21381 co-relation queries the response was YES. [2024-02-05 10:37:34,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9438 conditions, 1296 events. 535/1296 cut-off events. For 21377/21381 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 7449 event pairs, 25 based on Foata normal form. 3/1298 useless extension candidates. Maximal degree in co-relation 9380. Up to 292 conditions per place. [2024-02-05 10:37:34,005 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 40 selfloop transitions, 39 changer transitions 174/256 dead transitions. [2024-02-05 10:37:34,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 256 transitions, 5054 flow [2024-02-05 10:37:34,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-02-05 10:37:34,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-02-05 10:37:34,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 378 transitions. [2024-02-05 10:37:34,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39622641509433965 [2024-02-05 10:37:34,007 INFO L175 Difference]: Start difference. First operand has 276 places, 218 transitions, 4398 flow. Second operand 18 states and 378 transitions. [2024-02-05 10:37:34,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 256 transitions, 5054 flow [2024-02-05 10:37:34,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 256 transitions, 4201 flow, removed 41 selfloop flow, removed 33 redundant places. [2024-02-05 10:37:34,053 INFO L231 Difference]: Finished difference. Result has 235 places, 66 transitions, 998 flow [2024-02-05 10:37:34,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3560, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=998, PETRI_PLACES=235, PETRI_TRANSITIONS=66} [2024-02-05 10:37:34,054 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 182 predicate places. [2024-02-05 10:37:34,054 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 66 transitions, 998 flow [2024-02-05 10:37:34,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 18.695652173913043) internal successors, (430), 23 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:34,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:34,055 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-02-05 10:37:34,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-02-05 10:37:34,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:34,255 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:37:34,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:34,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1169529999, now seen corresponding path program 17 times [2024-02-05 10:37:34,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:34,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095140240] [2024-02-05 10:37:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:34,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:34,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:34,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095140240] [2024-02-05 10:37:34,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095140240] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:37:34,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748874670] [2024-02-05 10:37:34,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-05 10:37:34,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:34,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:37:34,322 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:37:34,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-02-05 10:37:34,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-05 10:37:34,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:37:34,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-05 10:37:34,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:37:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:34,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:37:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:34,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748874670] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:37:34,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:37:34,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-02-05 10:37:34,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739884695] [2024-02-05 10:37:34,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:37:34,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-05 10:37:34,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:34,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-05 10:37:34,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-02-05 10:37:34,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-02-05 10:37:34,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 66 transitions, 998 flow. Second operand has 11 states, 11 states have (on average 21.90909090909091) internal successors, (241), 11 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:34,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:34,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-02-05 10:37:34,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:34,733 INFO L124 PetriNetUnfolderBase]: 131/336 cut-off events. [2024-02-05 10:37:34,734 INFO L125 PetriNetUnfolderBase]: For 4455/4455 co-relation queries the response was YES. [2024-02-05 10:37:34,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2141 conditions, 336 events. 131/336 cut-off events. For 4455/4455 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1147 event pairs, 32 based on Foata normal form. 4/340 useless extension candidates. Maximal degree in co-relation 2091. Up to 97 conditions per place. [2024-02-05 10:37:34,736 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 61 selfloop transitions, 20 changer transitions 15/99 dead transitions. [2024-02-05 10:37:34,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 99 transitions, 1422 flow [2024-02-05 10:37:34,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-05 10:37:34,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-05 10:37:34,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 265 transitions. [2024-02-05 10:37:34,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-02-05 10:37:34,737 INFO L175 Difference]: Start difference. First operand has 235 places, 66 transitions, 998 flow. Second operand 11 states and 265 transitions. [2024-02-05 10:37:34,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 99 transitions, 1422 flow [2024-02-05 10:37:34,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 99 transitions, 825 flow, removed 22 selfloop flow, removed 74 redundant places. [2024-02-05 10:37:34,745 INFO L231 Difference]: Finished difference. Result has 116 places, 61 transitions, 447 flow [2024-02-05 10:37:34,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=447, PETRI_PLACES=116, PETRI_TRANSITIONS=61} [2024-02-05 10:37:34,745 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 63 predicate places. [2024-02-05 10:37:34,745 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 61 transitions, 447 flow [2024-02-05 10:37:34,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 21.90909090909091) internal successors, (241), 11 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:34,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:34,746 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:34,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-02-05 10:37:34,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-02-05 10:37:34,947 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 31 more)] === [2024-02-05 10:37:34,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:34,947 INFO L85 PathProgramCache]: Analyzing trace with hash -81895146, now seen corresponding path program 18 times [2024-02-05 10:37:34,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:34,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169428335] [2024-02-05 10:37:34,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:34,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:34,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:35,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:35,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169428335] [2024-02-05 10:37:35,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169428335] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:37:35,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340074237] [2024-02-05 10:37:35,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-05 10:37:35,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:35,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:37:35,118 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:37:35,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-02-05 10:37:35,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-05 10:37:35,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:37:35,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-05 10:37:35,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:37:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-05 10:37:35,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:37:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-02-05 10:37:35,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340074237] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:37:35,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:37:35,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 18 [2024-02-05 10:37:35,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055189908] [2024-02-05 10:37:35,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:37:35,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-05 10:37:35,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:35,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-05 10:37:35,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-02-05 10:37:35,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-02-05 10:37:35,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 61 transitions, 447 flow. Second operand has 19 states, 19 states have (on average 19.105263157894736) internal successors, (363), 19 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:35,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:35,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-02-05 10:37:35,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:36,206 INFO L124 PetriNetUnfolderBase]: 117/293 cut-off events. [2024-02-05 10:37:36,206 INFO L125 PetriNetUnfolderBase]: For 911/911 co-relation queries the response was YES. [2024-02-05 10:37:36,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1212 conditions, 293 events. 117/293 cut-off events. For 911/911 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 951 event pairs, 15 based on Foata normal form. 2/295 useless extension candidates. Maximal degree in co-relation 1187. Up to 56 conditions per place. [2024-02-05 10:37:36,207 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 0 selfloop transitions, 0 changer transitions 87/87 dead transitions. [2024-02-05 10:37:36,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 87 transitions, 729 flow [2024-02-05 10:37:36,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-05 10:37:36,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-05 10:37:36,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 305 transitions. [2024-02-05 10:37:36,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3836477987421384 [2024-02-05 10:37:36,208 INFO L175 Difference]: Start difference. First operand has 116 places, 61 transitions, 447 flow. Second operand 15 states and 305 transitions. [2024-02-05 10:37:36,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 87 transitions, 729 flow [2024-02-05 10:37:36,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 87 transitions, 677 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-02-05 10:37:36,211 INFO L231 Difference]: Finished difference. Result has 114 places, 0 transitions, 0 flow [2024-02-05 10:37:36,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=114, PETRI_TRANSITIONS=0} [2024-02-05 10:37:36,211 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 61 predicate places. [2024-02-05 10:37:36,211 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 0 transitions, 0 flow [2024-02-05 10:37:36,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.105263157894736) internal successors, (363), 19 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:36,214 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (33 of 34 remaining) [2024-02-05 10:37:36,215 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (32 of 34 remaining) [2024-02-05 10:37:36,215 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (31 of 34 remaining) [2024-02-05 10:37:36,215 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 34 remaining) [2024-02-05 10:37:36,215 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 34 remaining) [2024-02-05 10:37:36,215 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 34 remaining) [2024-02-05 10:37:36,216 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 34 remaining) [2024-02-05 10:37:36,216 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 34 remaining) [2024-02-05 10:37:36,216 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 34 remaining) [2024-02-05 10:37:36,216 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 34 remaining) [2024-02-05 10:37:36,216 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 34 remaining) [2024-02-05 10:37:36,216 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 34 remaining) [2024-02-05 10:37:36,217 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 34 remaining) [2024-02-05 10:37:36,217 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 34 remaining) [2024-02-05 10:37:36,217 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 34 remaining) [2024-02-05 10:37:36,217 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 34 remaining) [2024-02-05 10:37:36,217 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 34 remaining) [2024-02-05 10:37:36,217 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (16 of 34 remaining) [2024-02-05 10:37:36,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 34 remaining) [2024-02-05 10:37:36,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 34 remaining) [2024-02-05 10:37:36,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 34 remaining) [2024-02-05 10:37:36,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 34 remaining) [2024-02-05 10:37:36,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 34 remaining) [2024-02-05 10:37:36,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 34 remaining) [2024-02-05 10:37:36,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 34 remaining) [2024-02-05 10:37:36,219 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 34 remaining) [2024-02-05 10:37:36,219 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err6ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 34 remaining) [2024-02-05 10:37:36,219 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 34 remaining) [2024-02-05 10:37:36,219 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 34 remaining) [2024-02-05 10:37:36,219 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 34 remaining) [2024-02-05 10:37:36,219 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 34 remaining) [2024-02-05 10:37:36,219 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 34 remaining) [2024-02-05 10:37:36,219 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 34 remaining) [2024-02-05 10:37:36,219 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err6ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 34 remaining) [2024-02-05 10:37:36,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-02-05 10:37:36,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:36,420 INFO L445 BasicCegarLoop]: Path program histogram: [18, 12, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:37:36,425 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-02-05 10:37:36,425 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-02-05 10:37:36,429 INFO L503 ceAbstractionStarter]: Automizer considered 17 witness invariants [2024-02-05 10:37:36,430 INFO L504 ceAbstractionStarter]: WitnessConsidered=17 [2024-02-05 10:37:36,431 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.02 10:37:36 BasicIcfg [2024-02-05 10:37:36,431 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-02-05 10:37:36,431 INFO L158 Benchmark]: Toolchain (without parser) took 65775.02ms. Allocated memory was 151.0MB in the beginning and 3.2GB in the end (delta: 3.1GB). Free memory was 93.6MB in the beginning and 2.0GB in the end (delta: -1.9GB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2024-02-05 10:37:36,432 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 151.0MB. Free memory is still 112.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-05 10:37:36,432 INFO L158 Benchmark]: Witness Parser took 0.19ms. Allocated memory is still 151.0MB. Free memory is still 97.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-05 10:37:36,432 INFO L158 Benchmark]: CACSL2BoogieTranslator took 378.68ms. Allocated memory is still 151.0MB. Free memory was 93.2MB in the beginning and 77.9MB in the end (delta: 15.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-02-05 10:37:36,432 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.11ms. Allocated memory is still 151.0MB. Free memory was 77.9MB in the beginning and 76.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-02-05 10:37:36,433 INFO L158 Benchmark]: Boogie Preprocessor took 48.34ms. Allocated memory is still 151.0MB. Free memory was 76.4MB in the beginning and 74.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-05 10:37:36,433 INFO L158 Benchmark]: RCFGBuilder took 834.58ms. Allocated memory was 151.0MB in the beginning and 213.9MB in the end (delta: 62.9MB). Free memory was 74.3MB in the beginning and 173.9MB in the end (delta: -99.6MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-02-05 10:37:36,433 INFO L158 Benchmark]: TraceAbstraction took 64461.14ms. Allocated memory was 213.9MB in the beginning and 3.2GB in the end (delta: 3.0GB). Free memory was 172.8MB in the beginning and 2.0GB in the end (delta: -1.8GB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2024-02-05 10:37:36,435 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 151.0MB. Free memory is still 112.1MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.19ms. Allocated memory is still 151.0MB. Free memory is still 97.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 378.68ms. Allocated memory is still 151.0MB. Free memory was 93.2MB in the beginning and 77.9MB in the end (delta: 15.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.11ms. Allocated memory is still 151.0MB. Free memory was 77.9MB in the beginning and 76.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 48.34ms. Allocated memory is still 151.0MB. Free memory was 76.4MB in the beginning and 74.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 834.58ms. Allocated memory was 151.0MB in the beginning and 213.9MB in the end (delta: 62.9MB). Free memory was 74.3MB in the beginning and 173.9MB in the end (delta: -99.6MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 64461.14ms. Allocated memory was 213.9MB in the beginning and 3.2GB in the end (delta: 3.0GB). Free memory was 172.8MB in the beginning and 2.0GB in the end (delta: -1.8GB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 42]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 43]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 46]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 44]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 47]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 48]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 50]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 55]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 56]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 59]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 57]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 60]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 61]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 63]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 69]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 70]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 73]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 79]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 34 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 64.3s, OverallIterations: 51, TraceHistogramMax: 3, PathProgramHistogramMax: 18, EmptinessCheckTime: 0.0s, AutomataDifference: 46.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8651 SdHoareTripleChecker+Valid, 18.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7749 mSDsluCounter, 6149 SdHoareTripleChecker+Invalid, 15.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5799 mSDsCounter, 1066 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 39841 IncrementalHoareTripleChecker+Invalid, 40907 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1066 mSolverCounterUnsat, 350 mSDtfsCounter, 39841 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2133 GetRequests, 1198 SyntacticMatches, 20 SemanticMatches, 915 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6985 ImplicationChecksByTransitivity, 9.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22181occurred in iteration=43, InterpolantAutomatonStates: 701, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 10.7s InterpolantComputationTime, 2039 NumberOfCodeBlocks, 2039 NumberOfCodeBlocksAsserted, 98 NumberOfCheckSat, 2607 ConstructedInterpolants, 0 QuantifiedInterpolants, 13362 SizeOfPredicates, 70 NumberOfNonLiveVariables, 3906 ConjunctsInSsa, 219 ConjunctsInUnsatCore, 92 InterpolantComputations, 34 PerfectInterpolantSequences, 60/291 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 18 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-02-05 10:37:36,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE