./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/bench-exp2x3.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/bench-exp2x3.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 59af5db6 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/bench-exp2x3.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/bench-exp2x3.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-59af5db-m [2024-02-02 09:18:48,844 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-02 09:18:48,890 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-02 09:18:48,893 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-02 09:18:48,894 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-02 09:18:49,008 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-02 09:18:49,009 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-02 09:18:49,009 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-02 09:18:49,010 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-02 09:18:49,010 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-02 09:18:49,010 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-02 09:18:49,010 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-02 09:18:49,011 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-02 09:18:49,011 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-02 09:18:49,011 INFO L153 SettingsManager]: * Use SBE=true [2024-02-02 09:18:49,012 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-02 09:18:49,012 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-02 09:18:49,012 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-02 09:18:49,013 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-02 09:18:49,013 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-02 09:18:49,013 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-02 09:18:49,014 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-02 09:18:49,014 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-02 09:18:49,014 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-02 09:18:49,014 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-02 09:18:49,015 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-02 09:18:49,015 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-02 09:18:49,015 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-02 09:18:49,015 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-02 09:18:49,016 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-02 09:18:49,016 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-02 09:18:49,016 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-02 09:18:49,016 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 09:18:49,017 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-02 09:18:49,017 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-02 09:18:49,017 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-02 09:18:49,017 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-02 09:18:49,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-02 09:18:49,018 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-02 09:18:49,018 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-02 09:18:49,018 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-02 09:18:49,018 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-02 09:18:49,019 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-02 09:18:49,019 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-02 09:18:49,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-02 09:18:49,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-02 09:18:49,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-02 09:18:49,276 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-02 09:18:49,277 INFO L274 PluginConnector]: CDTParser initialized [2024-02-02 09:18:49,277 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp2x3.wvr.c [2024-02-02 09:18:50,370 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-02 09:18:50,544 INFO L384 CDTParser]: Found 1 translation units. [2024-02-02 09:18:50,545 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp2x3.wvr.c [2024-02-02 09:18:50,553 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b04db5103/27cd201723254bd8871ed7b16729e794/FLAG7800a0c8a [2024-02-02 09:18:50,568 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b04db5103/27cd201723254bd8871ed7b16729e794 [2024-02-02 09:18:50,570 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-02 09:18:50,571 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-02 09:18:50,572 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/bench-exp2x3.wvr.yml/witness.yml [2024-02-02 09:18:50,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-02 09:18:50,658 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-02 09:18:50,660 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-02 09:18:50,660 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-02 09:18:50,664 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-02 09:18:50,664 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 09:18:50" (1/2) ... [2024-02-02 09:18:50,665 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b39f8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:18:50, skipping insertion in model container [2024-02-02 09:18:50,665 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 09:18:50" (1/2) ... [2024-02-02 09:18:50,667 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@212c3a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 09:18:50, skipping insertion in model container [2024-02-02 09:18:50,667 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:18:50" (2/2) ... [2024-02-02 09:18:50,667 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b39f8c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:50, skipping insertion in model container [2024-02-02 09:18:50,667 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:18:50" (2/2) ... [2024-02-02 09:18:50,668 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-02 09:18:50,688 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-02 09:18:50,689 INFO L101 nessWitnessExtractor]: Loop invariant at [L54-L56] (unsigned long )_argptr == 0UL [2024-02-02 09:18:50,689 INFO L101 nessWitnessExtractor]: Location invariant before [L55-L55] (unsigned long )_argptr == 0UL [2024-02-02 09:18:50,689 INFO L101 nessWitnessExtractor]: Location invariant before [L73-L73] (((((((((0LL - (long long )n) + (long long )x1 >= 0LL) && ((long long )n + (long long )x1 >= 0LL)) && ((0LL - (long long )n) - (long long )x1 >= 0LL)) && ((long long )n - (long long )x1 >= 0LL)) && (x1 == 0U)) && (x2 == 0U)) && (x3 == 0U)) && (x4 == 0U)) && (n == 0U) [2024-02-02 09:18:50,689 INFO L101 nessWitnessExtractor]: Location invariant before [L77-L77] n == 0U [2024-02-02 09:18:50,690 INFO L101 nessWitnessExtractor]: Location invariant after [L37-L43] n == 0U [2024-02-02 09:18:50,690 INFO L101 nessWitnessExtractor]: Location invariant before [L75-L75] ((x3 == 0U) && (x4 == 0U)) && (n == 0U) [2024-02-02 09:18:50,690 INFO L101 nessWitnessExtractor]: Location invariant before [L47-L47] (unsigned long )_argptr == 0UL [2024-02-02 09:18:50,690 INFO L101 nessWitnessExtractor]: Location invariant before [L58-L58] (unsigned long )_argptr == 0UL [2024-02-02 09:18:50,690 INFO L101 nessWitnessExtractor]: Loop invariant at [L62-L64] (unsigned long )_argptr == 0UL [2024-02-02 09:18:50,690 INFO L101 nessWitnessExtractor]: Loop invariant at [L46-L48] (unsigned long )_argptr == 0UL [2024-02-02 09:18:50,690 INFO L101 nessWitnessExtractor]: Location invariant before [L39-L39] (unsigned long )_argptr == 0UL [2024-02-02 09:18:50,691 INFO L101 nessWitnessExtractor]: Location invariant before [L42-L42] (unsigned long )_argptr == 0UL [2024-02-02 09:18:50,691 INFO L101 nessWitnessExtractor]: Loop invariant at [L38-L40] (unsigned long )_argptr == 0UL [2024-02-02 09:18:50,691 INFO L101 nessWitnessExtractor]: Location invariant before [L76-L76] (x4 == 0U) && (n == 0U) [2024-02-02 09:18:50,691 INFO L101 nessWitnessExtractor]: Location invariant before [L50-L50] (unsigned long )_argptr == 0UL [2024-02-02 09:18:50,691 INFO L101 nessWitnessExtractor]: Location invariant before [L66-L66] (unsigned long )_argptr == 0UL [2024-02-02 09:18:50,691 INFO L101 nessWitnessExtractor]: Location invariant before [L63-L63] (unsigned long )_argptr == 0UL [2024-02-02 09:18:50,691 INFO L101 nessWitnessExtractor]: Location invariant before [L74-L74] (((x2 == 0U) && (x3 == 0U)) && (x4 == 0U)) && (n == 0U) [2024-02-02 09:18:50,709 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-02 09:18:50,844 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/bench-exp2x3.wvr.c[2289,2302] [2024-02-02 09:18:50,853 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 09:18:50,866 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-02 09:18:50,905 WARN L424 MainDispatcher]: Unable to annotate void* thread1(void* _argptr) { while (x1 < n) { x1 = x1 + x1; } return 0; } with a witness entry Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-02 09:18:50,938 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/bench-exp2x3.wvr.c[2289,2302] [2024-02-02 09:18:50,938 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-02 09:18:50,957 INFO L206 MainTranslator]: Completed translation [2024-02-02 09:18:50,958 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:50 WrapperNode [2024-02-02 09:18:50,958 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-02 09:18:50,959 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-02 09:18:50,959 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-02 09:18:50,959 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-02 09:18:50,971 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:50" (1/1) ... [2024-02-02 09:18:50,984 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:50" (1/1) ... [2024-02-02 09:18:51,016 INFO L138 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 100 [2024-02-02 09:18:51,017 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-02 09:18:51,018 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-02 09:18:51,018 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-02 09:18:51,018 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-02 09:18:51,027 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:50" (1/1) ... [2024-02-02 09:18:51,028 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:50" (1/1) ... [2024-02-02 09:18:51,037 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:50" (1/1) ... [2024-02-02 09:18:51,058 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-02-02 09:18:51,058 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:50" (1/1) ... [2024-02-02 09:18:51,059 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:50" (1/1) ... [2024-02-02 09:18:51,073 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:50" (1/1) ... [2024-02-02 09:18:51,077 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:50" (1/1) ... [2024-02-02 09:18:51,080 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:50" (1/1) ... [2024-02-02 09:18:51,082 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:50" (1/1) ... [2024-02-02 09:18:51,085 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-02 09:18:51,087 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-02 09:18:51,087 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-02 09:18:51,087 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-02 09:18:51,088 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:50" (1/1) ... [2024-02-02 09:18:51,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-02 09:18:51,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:18:51,117 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-02 09:18:51,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-02 09:18:51,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-02 09:18:51,154 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-02 09:18:51,154 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-02 09:18:51,154 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-02 09:18:51,154 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-02 09:18:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-02 09:18:51,155 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-02 09:18:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-02-02 09:18:51,155 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-02-02 09:18:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-02 09:18:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-02 09:18:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-02 09:18:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-02 09:18:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-02 09:18:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-02 09:18:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-02 09:18:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-02 09:18:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-02 09:18:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-02 09:18:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-02 09:18:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-02 09:18:51,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-02 09:18:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-02 09:18:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-02 09:18:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-02 09:18:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-02 09:18:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-02 09:18:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-02 09:18:51,160 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-02 09:18:51,307 INFO L244 CfgBuilder]: Building ICFG [2024-02-02 09:18:51,309 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-02 09:18:51,654 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-02 09:18:51,654 INFO L293 CfgBuilder]: Performing block encoding [2024-02-02 09:18:51,789 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-02 09:18:51,789 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-02-02 09:18:51,790 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 09:18:51 BoogieIcfgContainer [2024-02-02 09:18:51,791 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-02 09:18:51,793 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-02 09:18:51,793 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-02 09:18:51,796 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-02 09:18:51,796 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 09:18:50" (1/4) ... [2024-02-02 09:18:51,797 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea78711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 09:18:51, skipping insertion in model container [2024-02-02 09:18:51,797 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 02.02 09:18:50" (2/4) ... [2024-02-02 09:18:51,797 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea78711 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 02.02 09:18:51, skipping insertion in model container [2024-02-02 09:18:51,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 02.02 09:18:50" (3/4) ... [2024-02-02 09:18:51,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea78711 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 02.02 09:18:51, skipping insertion in model container [2024-02-02 09:18:51,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 09:18:51" (4/4) ... [2024-02-02 09:18:51,799 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x3.wvr.c [2024-02-02 09:18:51,812 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-02 09:18:51,813 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-02-02 09:18:51,813 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-02 09:18:51,912 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-02-02 09:18:51,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 77 transitions, 182 flow [2024-02-02 09:18:51,978 INFO L124 PetriNetUnfolderBase]: 4/73 cut-off events. [2024-02-02 09:18:51,979 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-02 09:18:51,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 73 events. 4/73 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 193 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2024-02-02 09:18:51,982 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 77 transitions, 182 flow [2024-02-02 09:18:51,985 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 72 transitions, 168 flow [2024-02-02 09:18:51,992 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-02 09:18:51,998 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;@6ae1ec05, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-02 09:18:51,998 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2024-02-02 09:18:52,000 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-02 09:18:52,000 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-02 09:18:52,000 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:18:52,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:52,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-02 09:18:52,002 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:18:52,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:52,006 INFO L85 PathProgramCache]: Analyzing trace with hash 11859, now seen corresponding path program 1 times [2024-02-02 09:18:52,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:52,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680851171] [2024-02-02 09:18:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:52,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:52,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:52,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680851171] [2024-02-02 09:18:52,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680851171] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:52,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:52,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-02 09:18:52,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403639315] [2024-02-02 09:18:52,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:52,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:18:52,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:52,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:18:52,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:18:52,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 77 [2024-02-02 09:18:52,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 72 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:52,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:52,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 77 [2024-02-02 09:18:52,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:53,450 INFO L124 PetriNetUnfolderBase]: 7352/10601 cut-off events. [2024-02-02 09:18:53,450 INFO L125 PetriNetUnfolderBase]: For 414/414 co-relation queries the response was YES. [2024-02-02 09:18:53,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20221 conditions, 10601 events. 7352/10601 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 64563 event pairs, 4752 based on Foata normal form. 0/7150 useless extension candidates. Maximal degree in co-relation 17346. Up to 9146 conditions per place. [2024-02-02 09:18:53,596 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 40 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2024-02-02 09:18:53,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 71 transitions, 250 flow [2024-02-02 09:18:53,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:18:53,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:18:53,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2024-02-02 09:18:53,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6147186147186147 [2024-02-02 09:18:53,610 INFO L175 Difference]: Start difference. First operand has 81 places, 72 transitions, 168 flow. Second operand 3 states and 142 transitions. [2024-02-02 09:18:53,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 71 transitions, 250 flow [2024-02-02 09:18:53,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 71 transitions, 234 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-02-02 09:18:53,628 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 154 flow [2024-02-02 09:18:53,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2024-02-02 09:18:53,632 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -7 predicate places. [2024-02-02 09:18:53,632 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 154 flow [2024-02-02 09:18:53,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:53,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:53,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-02 09:18:53,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-02 09:18:53,633 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:18:53,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:53,634 INFO L85 PathProgramCache]: Analyzing trace with hash 367971, now seen corresponding path program 1 times [2024-02-02 09:18:53,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:53,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112186002] [2024-02-02 09:18:53,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:53,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:53,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:53,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112186002] [2024-02-02 09:18:53,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112186002] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:53,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:53,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-02 09:18:53,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666102594] [2024-02-02 09:18:53,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:53,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:18:53,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:53,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:18:53,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:18:53,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 77 [2024-02-02 09:18:53,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:53,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:53,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 77 [2024-02-02 09:18:53,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:54,312 INFO L124 PetriNetUnfolderBase]: 7352/10600 cut-off events. [2024-02-02 09:18:54,312 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2024-02-02 09:18:54,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19906 conditions, 10600 events. 7352/10600 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 64495 event pairs, 4752 based on Foata normal form. 0/7150 useless extension candidates. Maximal degree in co-relation 19897. Up to 9144 conditions per place. [2024-02-02 09:18:54,360 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 39 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2024-02-02 09:18:54,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 70 transitions, 234 flow [2024-02-02 09:18:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:18:54,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:18:54,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 144 transitions. [2024-02-02 09:18:54,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233766233766234 [2024-02-02 09:18:54,364 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 154 flow. Second operand 3 states and 144 transitions. [2024-02-02 09:18:54,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 70 transitions, 234 flow [2024-02-02 09:18:54,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 70 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:18:54,367 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 152 flow [2024-02-02 09:18:54,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2024-02-02 09:18:54,367 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -8 predicate places. [2024-02-02 09:18:54,368 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 152 flow [2024-02-02 09:18:54,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:54,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:54,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-02-02 09:18:54,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-02 09:18:54,369 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:18:54,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:54,371 INFO L85 PathProgramCache]: Analyzing trace with hash 11407500, now seen corresponding path program 1 times [2024-02-02 09:18:54,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:54,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25229325] [2024-02-02 09:18:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:54,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:54,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:54,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25229325] [2024-02-02 09:18:54,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25229325] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:54,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:54,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-02 09:18:54,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699192388] [2024-02-02 09:18:54,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:54,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:18:54,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:54,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:18:54,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:18:54,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 77 [2024-02-02 09:18:54,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:54,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:54,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 77 [2024-02-02 09:18:54,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:55,113 INFO L124 PetriNetUnfolderBase]: 7352/10599 cut-off events. [2024-02-02 09:18:55,113 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2024-02-02 09:18:55,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19904 conditions, 10599 events. 7352/10599 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 64506 event pairs, 4752 based on Foata normal form. 0/7150 useless extension candidates. Maximal degree in co-relation 19893. Up to 9142 conditions per place. [2024-02-02 09:18:55,170 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 38 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2024-02-02 09:18:55,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 69 transitions, 230 flow [2024-02-02 09:18:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:18:55,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:18:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2024-02-02 09:18:55,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6320346320346321 [2024-02-02 09:18:55,174 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 152 flow. Second operand 3 states and 146 transitions. [2024-02-02 09:18:55,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 69 transitions, 230 flow [2024-02-02 09:18:55,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 69 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:18:55,176 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 150 flow [2024-02-02 09:18:55,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2024-02-02 09:18:55,177 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -9 predicate places. [2024-02-02 09:18:55,177 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 150 flow [2024-02-02 09:18:55,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:55,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:55,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-02 09:18:55,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-02 09:18:55,178 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:18:55,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:55,178 INFO L85 PathProgramCache]: Analyzing trace with hash 353632911, now seen corresponding path program 1 times [2024-02-02 09:18:55,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:55,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364094388] [2024-02-02 09:18:55,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:55,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:55,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:55,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:55,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364094388] [2024-02-02 09:18:55,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364094388] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:55,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:55,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-02 09:18:55,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551472580] [2024-02-02 09:18:55,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:55,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:18:55,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:55,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:18:55,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:18:55,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 77 [2024-02-02 09:18:55,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:55,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:55,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 77 [2024-02-02 09:18:55,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:55,778 INFO L124 PetriNetUnfolderBase]: 7352/10598 cut-off events. [2024-02-02 09:18:55,778 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2024-02-02 09:18:55,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19902 conditions, 10598 events. 7352/10598 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 64570 event pairs, 4752 based on Foata normal form. 0/7150 useless extension candidates. Maximal degree in co-relation 19889. Up to 9140 conditions per place. [2024-02-02 09:18:55,826 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 37 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2024-02-02 09:18:55,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 68 transitions, 226 flow [2024-02-02 09:18:55,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:18:55,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:18:55,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2024-02-02 09:18:55,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6406926406926406 [2024-02-02 09:18:55,828 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 150 flow. Second operand 3 states and 148 transitions. [2024-02-02 09:18:55,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 68 transitions, 226 flow [2024-02-02 09:18:55,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 68 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:18:55,830 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 148 flow [2024-02-02 09:18:55,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-02-02 09:18:55,830 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -10 predicate places. [2024-02-02 09:18:55,831 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 148 flow [2024-02-02 09:18:55,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:55,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:55,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-02 09:18:55,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-02 09:18:55,831 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:18:55,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:55,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1922281298, now seen corresponding path program 1 times [2024-02-02 09:18:55,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:55,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852121739] [2024-02-02 09:18:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:55,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:55,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:55,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:55,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852121739] [2024-02-02 09:18:55,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852121739] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:55,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:55,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-02 09:18:55,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984740653] [2024-02-02 09:18:55,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:55,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:18:55,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:55,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:18:55,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:18:55,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 77 [2024-02-02 09:18:55,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:55,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:55,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 77 [2024-02-02 09:18:55,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:56,523 INFO L124 PetriNetUnfolderBase]: 7352/10597 cut-off events. [2024-02-02 09:18:56,524 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2024-02-02 09:18:56,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19900 conditions, 10597 events. 7352/10597 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 64677 event pairs, 4752 based on Foata normal form. 0/7150 useless extension candidates. Maximal degree in co-relation 19885. Up to 9138 conditions per place. [2024-02-02 09:18:56,567 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 36 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-02-02 09:18:56,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 67 transitions, 222 flow [2024-02-02 09:18:56,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:18:56,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:18:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2024-02-02 09:18:56,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6493506493506493 [2024-02-02 09:18:56,569 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 148 flow. Second operand 3 states and 150 transitions. [2024-02-02 09:18:56,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 67 transitions, 222 flow [2024-02-02 09:18:56,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 67 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:18:56,570 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 146 flow [2024-02-02 09:18:56,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2024-02-02 09:18:56,573 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -11 predicate places. [2024-02-02 09:18:56,573 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 146 flow [2024-02-02 09:18:56,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:56,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:56,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:18:56,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-02 09:18:56,574 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:18:56,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:56,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1882734943, now seen corresponding path program 1 times [2024-02-02 09:18:56,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:56,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502624366] [2024-02-02 09:18:56,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:56,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:56,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:56,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502624366] [2024-02-02 09:18:56,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502624366] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:56,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:56,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:18:56,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226207857] [2024-02-02 09:18:56,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:56,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:18:56,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:56,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:18:56,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:18:56,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 77 [2024-02-02 09:18:56,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:56,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:56,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 77 [2024-02-02 09:18:56,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:56,904 INFO L124 PetriNetUnfolderBase]: 2599/4078 cut-off events. [2024-02-02 09:18:56,904 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-02 09:18:56,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7628 conditions, 4078 events. 2599/4078 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 27919 event pairs, 279 based on Foata normal form. 340/4264 useless extension candidates. Maximal degree in co-relation 7611. Up to 2984 conditions per place. [2024-02-02 09:18:56,927 INFO L140 encePairwiseOnDemand]: 71/77 looper letters, 49 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2024-02-02 09:18:56,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 79 transitions, 275 flow [2024-02-02 09:18:56,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:18:56,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:18:56,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 203 transitions. [2024-02-02 09:18:56,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6590909090909091 [2024-02-02 09:18:56,929 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 146 flow. Second operand 4 states and 203 transitions. [2024-02-02 09:18:56,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 79 transitions, 275 flow [2024-02-02 09:18:56,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 79 transitions, 271 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:18:56,931 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 138 flow [2024-02-02 09:18:56,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-02-02 09:18:56,933 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -14 predicate places. [2024-02-02 09:18:56,933 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 138 flow [2024-02-02 09:18:56,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:56,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:56,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:18:56,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-02 09:18:56,934 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:18:56,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:56,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1128334341, now seen corresponding path program 1 times [2024-02-02 09:18:56,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:56,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817364976] [2024-02-02 09:18:56,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:56,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:57,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:57,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817364976] [2024-02-02 09:18:57,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817364976] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:57,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:57,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:18:57,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680155327] [2024-02-02 09:18:57,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:57,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:18:57,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:57,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:18:57,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:18:57,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 77 [2024-02-02 09:18:57,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:57,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:57,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 77 [2024-02-02 09:18:57,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:57,479 INFO L124 PetriNetUnfolderBase]: 3687/5924 cut-off events. [2024-02-02 09:18:57,479 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2024-02-02 09:18:57,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10741 conditions, 5924 events. 3687/5924 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 38265 event pairs, 1428 based on Foata normal form. 400/5997 useless extension candidates. Maximal degree in co-relation 10720. Up to 4076 conditions per place. [2024-02-02 09:18:57,503 INFO L140 encePairwiseOnDemand]: 71/77 looper letters, 52 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2024-02-02 09:18:57,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 279 flow [2024-02-02 09:18:57,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:18:57,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:18:57,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 206 transitions. [2024-02-02 09:18:57,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6688311688311688 [2024-02-02 09:18:57,505 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 138 flow. Second operand 4 states and 206 transitions. [2024-02-02 09:18:57,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 279 flow [2024-02-02 09:18:57,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 276 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:18:57,506 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 131 flow [2024-02-02 09:18:57,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=131, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-02-02 09:18:57,507 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -17 predicate places. [2024-02-02 09:18:57,507 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 131 flow [2024-02-02 09:18:57,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:57,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:57,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:18:57,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-02 09:18:57,508 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:18:57,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:57,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1997943410, now seen corresponding path program 1 times [2024-02-02 09:18:57,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:57,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274713044] [2024-02-02 09:18:57,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:57,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:57,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:57,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274713044] [2024-02-02 09:18:57,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274713044] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:57,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:57,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:18:57,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433589924] [2024-02-02 09:18:57,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:57,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:18:57,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:57,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:18:57,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:18:57,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 77 [2024-02-02 09:18:57,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:57,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:57,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 77 [2024-02-02 09:18:57,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:57,797 INFO L124 PetriNetUnfolderBase]: 2711/4292 cut-off events. [2024-02-02 09:18:57,797 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2024-02-02 09:18:57,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7951 conditions, 4292 events. 2711/4292 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 29425 event pairs, 117 based on Foata normal form. 400/4545 useless extension candidates. Maximal degree in co-relation 7931. Up to 2920 conditions per place. [2024-02-02 09:18:57,819 INFO L140 encePairwiseOnDemand]: 71/77 looper letters, 55 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2024-02-02 09:18:57,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 284 flow [2024-02-02 09:18:57,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:18:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:18:57,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 209 transitions. [2024-02-02 09:18:57,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-02-02 09:18:57,821 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 131 flow. Second operand 4 states and 209 transitions. [2024-02-02 09:18:57,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 284 flow [2024-02-02 09:18:57,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 77 transitions, 281 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:18:57,822 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 124 flow [2024-02-02 09:18:57,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-02-02 09:18:57,823 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -20 predicate places. [2024-02-02 09:18:57,823 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 124 flow [2024-02-02 09:18:57,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:57,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:57,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:18:57,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-02 09:18:57,824 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread4Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:18:57,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:57,824 INFO L85 PathProgramCache]: Analyzing trace with hash -174297776, now seen corresponding path program 1 times [2024-02-02 09:18:57,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:57,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562610154] [2024-02-02 09:18:57,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:57,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:57,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:57,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562610154] [2024-02-02 09:18:57,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562610154] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:57,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:57,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:18:57,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69050821] [2024-02-02 09:18:57,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:57,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:18:57,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:57,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:18:57,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:18:57,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 77 [2024-02-02 09:18:57,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:57,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:57,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 77 [2024-02-02 09:18:57,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:58,130 INFO L124 PetriNetUnfolderBase]: 3016/4468 cut-off events. [2024-02-02 09:18:58,130 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2024-02-02 09:18:58,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8444 conditions, 4468 events. 3016/4468 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 27201 event pairs, 305 based on Foata normal form. 340/4724 useless extension candidates. Maximal degree in co-relation 8424. Up to 2810 conditions per place. [2024-02-02 09:18:58,151 INFO L140 encePairwiseOnDemand]: 71/77 looper letters, 58 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2024-02-02 09:18:58,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 76 transitions, 289 flow [2024-02-02 09:18:58,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-02 09:18:58,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-02 09:18:58,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 212 transitions. [2024-02-02 09:18:58,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6883116883116883 [2024-02-02 09:18:58,153 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 124 flow. Second operand 4 states and 212 transitions. [2024-02-02 09:18:58,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 76 transitions, 289 flow [2024-02-02 09:18:58,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:18:58,156 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 117 flow [2024-02-02 09:18:58,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-02-02 09:18:58,157 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -23 predicate places. [2024-02-02 09:18:58,157 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 117 flow [2024-02-02 09:18:58,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:58,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:58,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:18:58,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-02 09:18:58,158 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:18:58,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:58,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1409059214, now seen corresponding path program 1 times [2024-02-02 09:18:58,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:58,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275571234] [2024-02-02 09:18:58,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:58,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:58,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:58,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275571234] [2024-02-02 09:18:58,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275571234] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:58,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:58,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-02 09:18:58,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060193512] [2024-02-02 09:18:58,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:58,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-02 09:18:58,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:58,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-02 09:18:58,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-02 09:18:58,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 77 [2024-02-02 09:18:58,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:58,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:58,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 77 [2024-02-02 09:18:58,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:58,755 INFO L124 PetriNetUnfolderBase]: 4381/6684 cut-off events. [2024-02-02 09:18:58,756 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2024-02-02 09:18:58,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12471 conditions, 6684 events. 4381/6684 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 39987 event pairs, 656 based on Foata normal form. 1/6559 useless extension candidates. Maximal degree in co-relation 12451. Up to 4604 conditions per place. [2024-02-02 09:18:58,783 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 52 selfloop transitions, 7 changer transitions 1/77 dead transitions. [2024-02-02 09:18:58,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 77 transitions, 298 flow [2024-02-02 09:18:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-02 09:18:58,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-02 09:18:58,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2024-02-02 09:18:58,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8095238095238095 [2024-02-02 09:18:58,785 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 117 flow. Second operand 3 states and 187 transitions. [2024-02-02 09:18:58,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 77 transitions, 298 flow [2024-02-02 09:18:58,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 77 transitions, 293 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-02 09:18:58,787 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 153 flow [2024-02-02 09:18:58,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-02-02 09:18:58,789 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -22 predicate places. [2024-02-02 09:18:58,790 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 153 flow [2024-02-02 09:18:58,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:58,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:58,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:18:58,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-02 09:18:58,792 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:18:58,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:58,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1558739569, now seen corresponding path program 1 times [2024-02-02 09:18:58,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:58,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607117665] [2024-02-02 09:18:58,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:58,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:58,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:58,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607117665] [2024-02-02 09:18:58,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607117665] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:58,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:58,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-02 09:18:58,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533943745] [2024-02-02 09:18:58,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:58,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:18:58,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:58,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:18:58,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:18:58,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 77 [2024-02-02 09:18:58,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 153 flow. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:58,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:58,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 77 [2024-02-02 09:18:58,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:18:59,567 INFO L124 PetriNetUnfolderBase]: 8981/12491 cut-off events. [2024-02-02 09:18:59,567 INFO L125 PetriNetUnfolderBase]: For 2468/3064 co-relation queries the response was YES. [2024-02-02 09:18:59,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27727 conditions, 12491 events. 8981/12491 cut-off events. For 2468/3064 co-relation queries the response was YES. Maximal size of possible extension queue 799. Compared 73641 event pairs, 1167 based on Foata normal form. 30/10994 useless extension candidates. Maximal degree in co-relation 27702. Up to 4261 conditions per place. [2024-02-02 09:18:59,632 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 93 selfloop transitions, 15 changer transitions 0/123 dead transitions. [2024-02-02 09:18:59,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 123 transitions, 554 flow [2024-02-02 09:18:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 09:18:59,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 09:18:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 301 transitions. [2024-02-02 09:18:59,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7818181818181819 [2024-02-02 09:18:59,634 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 153 flow. Second operand 5 states and 301 transitions. [2024-02-02 09:18:59,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 123 transitions, 554 flow [2024-02-02 09:18:59,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 123 transitions, 543 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 09:18:59,636 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 244 flow [2024-02-02 09:18:59,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2024-02-02 09:18:59,637 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -16 predicate places. [2024-02-02 09:18:59,637 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 244 flow [2024-02-02 09:18:59,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:59,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:18:59,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:18:59,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-02 09:18:59,638 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:18:59,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:18:59,638 INFO L85 PathProgramCache]: Analyzing trace with hash -311053775, now seen corresponding path program 2 times [2024-02-02 09:18:59,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:18:59,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947096876] [2024-02-02 09:18:59,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:18:59,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:18:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:18:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:18:59,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:18:59,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947096876] [2024-02-02 09:18:59,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947096876] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:18:59,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:18:59,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-02 09:18:59,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998714730] [2024-02-02 09:18:59,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:18:59,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:18:59,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:18:59,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:18:59,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:18:59,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 77 [2024-02-02 09:18:59,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 244 flow. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:18:59,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:18:59,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 77 [2024-02-02 09:18:59,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:19:00,499 INFO L124 PetriNetUnfolderBase]: 8625/12192 cut-off events. [2024-02-02 09:19:00,500 INFO L125 PetriNetUnfolderBase]: For 7830/7922 co-relation queries the response was YES. [2024-02-02 09:19:00,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31085 conditions, 12192 events. 8625/12192 cut-off events. For 7830/7922 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 73685 event pairs, 1751 based on Foata normal form. 262/12129 useless extension candidates. Maximal degree in co-relation 31053. Up to 4120 conditions per place. [2024-02-02 09:19:00,568 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 99 selfloop transitions, 17 changer transitions 0/131 dead transitions. [2024-02-02 09:19:00,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 131 transitions, 671 flow [2024-02-02 09:19:00,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 09:19:00,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 09:19:00,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 304 transitions. [2024-02-02 09:19:00,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7896103896103897 [2024-02-02 09:19:00,570 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 244 flow. Second operand 5 states and 304 transitions. [2024-02-02 09:19:00,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 131 transitions, 671 flow [2024-02-02 09:19:00,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 131 transitions, 671 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-02 09:19:00,574 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 353 flow [2024-02-02 09:19:00,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=353, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2024-02-02 09:19:00,574 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -8 predicate places. [2024-02-02 09:19:00,575 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 353 flow [2024-02-02 09:19:00,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:19:00,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:19:00,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:19:00,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-02 09:19:00,575 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:19:00,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:19:00,576 INFO L85 PathProgramCache]: Analyzing trace with hash -156189926, now seen corresponding path program 1 times [2024-02-02 09:19:00,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:19:00,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49001824] [2024-02-02 09:19:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:19:00,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:19:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:19:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:19:00,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:19:00,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49001824] [2024-02-02 09:19:00,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49001824] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:19:00,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:19:00,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-02 09:19:00,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027596781] [2024-02-02 09:19:00,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:19:00,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:19:00,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:19:00,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:19:00,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:19:00,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 77 [2024-02-02 09:19:00,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 353 flow. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:19:00,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:19:00,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 77 [2024-02-02 09:19:00,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:19:01,566 INFO L124 PetriNetUnfolderBase]: 8981/12445 cut-off events. [2024-02-02 09:19:01,566 INFO L125 PetriNetUnfolderBase]: For 22225/22788 co-relation queries the response was YES. [2024-02-02 09:19:01,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37098 conditions, 12445 events. 8981/12445 cut-off events. For 22225/22788 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 73936 event pairs, 967 based on Foata normal form. 201/12410 useless extension candidates. Maximal degree in co-relation 37056. Up to 4759 conditions per place. [2024-02-02 09:19:01,643 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 101 selfloop transitions, 14 changer transitions 0/130 dead transitions. [2024-02-02 09:19:01,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 130 transitions, 777 flow [2024-02-02 09:19:01,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 09:19:01,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 09:19:01,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 300 transitions. [2024-02-02 09:19:01,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7792207792207793 [2024-02-02 09:19:01,645 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 353 flow. Second operand 5 states and 300 transitions. [2024-02-02 09:19:01,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 130 transitions, 777 flow [2024-02-02 09:19:01,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 130 transitions, 773 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-02-02 09:19:01,685 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 440 flow [2024-02-02 09:19:01,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=440, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2024-02-02 09:19:01,685 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, -1 predicate places. [2024-02-02 09:19:01,686 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 440 flow [2024-02-02 09:19:01,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:19:01,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:19:01,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:19:01,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-02 09:19:01,686 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:19:01,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:19:01,687 INFO L85 PathProgramCache]: Analyzing trace with hash 150395356, now seen corresponding path program 2 times [2024-02-02 09:19:01,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:19:01,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544998214] [2024-02-02 09:19:01,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:19:01,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:19:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:19:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:19:01,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:19:01,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544998214] [2024-02-02 09:19:01,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544998214] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:19:01,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:19:01,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-02 09:19:01,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522762742] [2024-02-02 09:19:01,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:19:01,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:19:01,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:19:01,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:19:01,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:19:01,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 77 [2024-02-02 09:19:01,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 440 flow. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:19:01,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:19:01,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 77 [2024-02-02 09:19:01,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:19:02,633 INFO L124 PetriNetUnfolderBase]: 8549/11872 cut-off events. [2024-02-02 09:19:02,633 INFO L125 PetriNetUnfolderBase]: For 25984/26079 co-relation queries the response was YES. [2024-02-02 09:19:02,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36974 conditions, 11872 events. 8549/11872 cut-off events. For 25984/26079 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 69463 event pairs, 2391 based on Foata normal form. 230/11748 useless extension candidates. Maximal degree in co-relation 36923. Up to 5167 conditions per place. [2024-02-02 09:19:02,715 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 104 selfloop transitions, 16 changer transitions 0/135 dead transitions. [2024-02-02 09:19:02,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 135 transitions, 875 flow [2024-02-02 09:19:02,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 09:19:02,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 09:19:02,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 301 transitions. [2024-02-02 09:19:02,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7818181818181819 [2024-02-02 09:19:02,717 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 440 flow. Second operand 5 states and 301 transitions. [2024-02-02 09:19:02,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 135 transitions, 875 flow [2024-02-02 09:19:02,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 135 transitions, 866 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-02-02 09:19:02,761 INFO L231 Difference]: Finished difference. Result has 86 places, 77 transitions, 520 flow [2024-02-02 09:19:02,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=520, PETRI_PLACES=86, PETRI_TRANSITIONS=77} [2024-02-02 09:19:02,761 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 5 predicate places. [2024-02-02 09:19:02,761 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 77 transitions, 520 flow [2024-02-02 09:19:02,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:19:02,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:19:02,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:19:02,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-02 09:19:02,762 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:19:02,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:19:02,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1020192915, now seen corresponding path program 1 times [2024-02-02 09:19:02,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:19:02,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306038731] [2024-02-02 09:19:02,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:19:02,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:19:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:19:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:19:02,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:19:02,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306038731] [2024-02-02 09:19:02,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306038731] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:19:02,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029131315] [2024-02-02 09:19:02,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:19:02,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:19:02,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:19:02,849 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:19:02,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-02 09:19:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:19:02,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-02 09:19:02,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:19:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:19:03,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:19:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:19:03,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029131315] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:19:03,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:19:03,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-02-02 09:19:03,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768972354] [2024-02-02 09:19:03,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:19:03,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-02 09:19:03,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:19:03,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-02 09:19:03,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-02-02 09:19:03,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 77 [2024-02-02 09:19:03,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 77 transitions, 520 flow. Second operand has 6 states, 6 states have (on average 48.0) internal successors, (288), 6 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:19:03,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:19:03,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 77 [2024-02-02 09:19:03,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:19:04,868 INFO L124 PetriNetUnfolderBase]: 15260/21243 cut-off events. [2024-02-02 09:19:04,868 INFO L125 PetriNetUnfolderBase]: For 97732/103005 co-relation queries the response was YES. [2024-02-02 09:19:04,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72573 conditions, 21243 events. 15260/21243 cut-off events. For 97732/103005 co-relation queries the response was YES. Maximal size of possible extension queue 1199. Compared 134839 event pairs, 1803 based on Foata normal form. 1148/19591 useless extension candidates. Maximal degree in co-relation 72515. Up to 6152 conditions per place. [2024-02-02 09:19:05,046 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 234 selfloop transitions, 16 changer transitions 0/273 dead transitions. [2024-02-02 09:19:05,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 273 transitions, 2514 flow [2024-02-02 09:19:05,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-02 09:19:05,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-02 09:19:05,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 514 transitions. [2024-02-02 09:19:05,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7417027417027418 [2024-02-02 09:19:05,048 INFO L175 Difference]: Start difference. First operand has 86 places, 77 transitions, 520 flow. Second operand 9 states and 514 transitions. [2024-02-02 09:19:05,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 273 transitions, 2514 flow [2024-02-02 09:19:05,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 273 transitions, 2453 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-02-02 09:19:05,093 INFO L231 Difference]: Finished difference. Result has 99 places, 87 transitions, 617 flow [2024-02-02 09:19:05,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=617, PETRI_PLACES=99, PETRI_TRANSITIONS=87} [2024-02-02 09:19:05,095 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 18 predicate places. [2024-02-02 09:19:05,095 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 87 transitions, 617 flow [2024-02-02 09:19:05,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 48.0) internal successors, (288), 6 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:19:05,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:19:05,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:19:05,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-02 09:19:05,309 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,SelfDestructingSolverStorable14 [2024-02-02 09:19:05,310 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:19:05,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:19:05,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1715935233, now seen corresponding path program 2 times [2024-02-02 09:19:05,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:19:05,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502048674] [2024-02-02 09:19:05,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:19:05,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:19:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:19:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:19:05,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:19:05,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502048674] [2024-02-02 09:19:05,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502048674] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:19:05,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:19:05,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-02 09:19:05,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651376650] [2024-02-02 09:19:05,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:19:05,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:19:05,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:19:05,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:19:05,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:19:05,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 77 [2024-02-02 09:19:05,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 87 transitions, 617 flow. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:19:05,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:19:05,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 77 [2024-02-02 09:19:05,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:19:06,711 INFO L124 PetriNetUnfolderBase]: 13356/18589 cut-off events. [2024-02-02 09:19:06,711 INFO L125 PetriNetUnfolderBase]: For 95819/100659 co-relation queries the response was YES. [2024-02-02 09:19:06,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74333 conditions, 18589 events. 13356/18589 cut-off events. For 95819/100659 co-relation queries the response was YES. Maximal size of possible extension queue 1034. Compared 115943 event pairs, 1205 based on Foata normal form. 1205/18984 useless extension candidates. Maximal degree in co-relation 74266. Up to 6257 conditions per place. [2024-02-02 09:19:06,894 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 148 selfloop transitions, 18 changer transitions 0/189 dead transitions. [2024-02-02 09:19:06,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 189 transitions, 1760 flow [2024-02-02 09:19:06,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 09:19:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 09:19:06,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 296 transitions. [2024-02-02 09:19:06,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7688311688311689 [2024-02-02 09:19:06,897 INFO L175 Difference]: Start difference. First operand has 99 places, 87 transitions, 617 flow. Second operand 5 states and 296 transitions. [2024-02-02 09:19:06,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 189 transitions, 1760 flow [2024-02-02 09:19:07,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 189 transitions, 1758 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-02 09:19:07,004 INFO L231 Difference]: Finished difference. Result has 105 places, 96 transitions, 761 flow [2024-02-02 09:19:07,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=761, PETRI_PLACES=105, PETRI_TRANSITIONS=96} [2024-02-02 09:19:07,005 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 24 predicate places. [2024-02-02 09:19:07,005 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 96 transitions, 761 flow [2024-02-02 09:19:07,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:19:07,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:19:07,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:19:07,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-02-02 09:19:07,006 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:19:07,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:19:07,006 INFO L85 PathProgramCache]: Analyzing trace with hash -980062506, now seen corresponding path program 1 times [2024-02-02 09:19:07,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:19:07,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072576575] [2024-02-02 09:19:07,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:19:07,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:19:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:19:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:19:07,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:19:07,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072576575] [2024-02-02 09:19:07,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072576575] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:19:07,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:19:07,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-02 09:19:07,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772396701] [2024-02-02 09:19:07,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:19:07,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:19:07,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:19:07,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:19:07,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:19:07,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 77 [2024-02-02 09:19:07,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 96 transitions, 761 flow. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:19:07,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:19:07,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 77 [2024-02-02 09:19:07,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:19:08,596 INFO L124 PetriNetUnfolderBase]: 13188/18119 cut-off events. [2024-02-02 09:19:08,596 INFO L125 PetriNetUnfolderBase]: For 110175/115260 co-relation queries the response was YES. [2024-02-02 09:19:08,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78323 conditions, 18119 events. 13188/18119 cut-off events. For 110175/115260 co-relation queries the response was YES. Maximal size of possible extension queue 1000. Compared 108417 event pairs, 1177 based on Foata normal form. 1261/18574 useless extension candidates. Maximal degree in co-relation 78248. Up to 8801 conditions per place. [2024-02-02 09:19:08,720 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 154 selfloop transitions, 12 changer transitions 0/189 dead transitions. [2024-02-02 09:19:08,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 189 transitions, 1829 flow [2024-02-02 09:19:08,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 09:19:08,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 09:19:08,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 295 transitions. [2024-02-02 09:19:08,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7662337662337663 [2024-02-02 09:19:08,722 INFO L175 Difference]: Start difference. First operand has 105 places, 96 transitions, 761 flow. Second operand 5 states and 295 transitions. [2024-02-02 09:19:08,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 189 transitions, 1829 flow [2024-02-02 09:19:08,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 189 transitions, 1819 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-02-02 09:19:08,876 INFO L231 Difference]: Finished difference. Result has 112 places, 97 transitions, 796 flow [2024-02-02 09:19:08,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=796, PETRI_PLACES=112, PETRI_TRANSITIONS=97} [2024-02-02 09:19:08,877 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 31 predicate places. [2024-02-02 09:19:08,877 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 97 transitions, 796 flow [2024-02-02 09:19:08,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:19:08,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:19:08,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:19:08,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-02-02 09:19:08,878 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:19:08,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:19:08,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1000293666, now seen corresponding path program 2 times [2024-02-02 09:19:08,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:19:08,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049904987] [2024-02-02 09:19:08,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:19:08,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:19:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:19:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:19:08,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:19:08,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049904987] [2024-02-02 09:19:08,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049904987] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-02 09:19:08,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-02 09:19:08,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-02 09:19:08,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324339662] [2024-02-02 09:19:08,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-02 09:19:08,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-02 09:19:08,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:19:08,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-02 09:19:08,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-02 09:19:08,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 77 [2024-02-02 09:19:08,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 97 transitions, 796 flow. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:19:08,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:19:08,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 77 [2024-02-02 09:19:08,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:19:10,406 INFO L124 PetriNetUnfolderBase]: 13304/18683 cut-off events. [2024-02-02 09:19:10,406 INFO L125 PetriNetUnfolderBase]: For 124359/129104 co-relation queries the response was YES. [2024-02-02 09:19:10,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82744 conditions, 18683 events. 13304/18683 cut-off events. For 124359/129104 co-relation queries the response was YES. Maximal size of possible extension queue 943. Compared 116669 event pairs, 2143 based on Foata normal form. 1348/19176 useless extension candidates. Maximal degree in co-relation 82660. Up to 8589 conditions per place. [2024-02-02 09:19:10,596 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 158 selfloop transitions, 16 changer transitions 0/197 dead transitions. [2024-02-02 09:19:10,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 197 transitions, 1951 flow [2024-02-02 09:19:10,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-02 09:19:10,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-02 09:19:10,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 297 transitions. [2024-02-02 09:19:10,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7714285714285715 [2024-02-02 09:19:10,598 INFO L175 Difference]: Start difference. First operand has 112 places, 97 transitions, 796 flow. Second operand 5 states and 297 transitions. [2024-02-02 09:19:10,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 197 transitions, 1951 flow [2024-02-02 09:19:10,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 197 transitions, 1934 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-02-02 09:19:10,871 INFO L231 Difference]: Finished difference. Result has 118 places, 102 transitions, 896 flow [2024-02-02 09:19:10,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=896, PETRI_PLACES=118, PETRI_TRANSITIONS=102} [2024-02-02 09:19:10,872 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 37 predicate places. [2024-02-02 09:19:10,872 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 102 transitions, 896 flow [2024-02-02 09:19:10,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:19:10,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:19:10,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:19:10,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-02-02 09:19:10,873 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:19:10,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:19:10,875 INFO L85 PathProgramCache]: Analyzing trace with hash -786817993, now seen corresponding path program 1 times [2024-02-02 09:19:10,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:19:10,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770115649] [2024-02-02 09:19:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:19:10,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:19:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:19:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:19:11,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:19:11,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770115649] [2024-02-02 09:19:11,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770115649] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:19:11,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487701201] [2024-02-02 09:19:11,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:19:11,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:19:11,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:19:11,428 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:19:11,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-02 09:19:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:19:11,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-02 09:19:11,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:19:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:19:28,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:19:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:19:29,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487701201] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:19:29,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:19:29,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-02-02 09:19:29,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100945783] [2024-02-02 09:19:29,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:19:29,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-02 09:19:29,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:19:29,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-02 09:19:29,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2024-02-02 09:19:31,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:19:35,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:19:39,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:19:42,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:19:46,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:19:47,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 77 [2024-02-02 09:19:47,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 102 transitions, 896 flow. Second operand has 19 states, 19 states have (on average 42.578947368421055) internal successors, (809), 19 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:19:47,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:19:47,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 77 [2024-02-02 09:19:47,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:19:54,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:20:00,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:20:04,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:20:09,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:20:13,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:20:18,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:20:22,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:20:23,978 INFO L124 PetriNetUnfolderBase]: 29934/42356 cut-off events. [2024-02-02 09:20:23,979 INFO L125 PetriNetUnfolderBase]: For 302130/312421 co-relation queries the response was YES. [2024-02-02 09:20:24,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199610 conditions, 42356 events. 29934/42356 cut-off events. For 302130/312421 co-relation queries the response was YES. Maximal size of possible extension queue 2025. Compared 286544 event pairs, 3228 based on Foata normal form. 1423/42446 useless extension candidates. Maximal degree in co-relation 199519. Up to 19554 conditions per place. [2024-02-02 09:20:24,508 INFO L140 encePairwiseOnDemand]: 64/77 looper letters, 378 selfloop transitions, 197 changer transitions 29/627 dead transitions. [2024-02-02 09:20:24,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 627 transitions, 6103 flow [2024-02-02 09:20:24,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-02 09:20:24,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-02 09:20:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1283 transitions. [2024-02-02 09:20:24,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7244494635798984 [2024-02-02 09:20:24,526 INFO L175 Difference]: Start difference. First operand has 118 places, 102 transitions, 896 flow. Second operand 23 states and 1283 transitions. [2024-02-02 09:20:24,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 627 transitions, 6103 flow [2024-02-02 09:20:26,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 627 transitions, 6044 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-02-02 09:20:26,385 INFO L231 Difference]: Finished difference. Result has 149 places, 295 transitions, 3969 flow [2024-02-02 09:20:26,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3969, PETRI_PLACES=149, PETRI_TRANSITIONS=295} [2024-02-02 09:20:26,386 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 68 predicate places. [2024-02-02 09:20:26,386 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 295 transitions, 3969 flow [2024-02-02 09:20:26,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 42.578947368421055) internal successors, (809), 19 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:20:26,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:20:26,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:20:26,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-02-02 09:20:26,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:20:26,598 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:20:26,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:20:26,599 INFO L85 PathProgramCache]: Analyzing trace with hash 2004511291, now seen corresponding path program 2 times [2024-02-02 09:20:26,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:20:26,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901586973] [2024-02-02 09:20:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:20:26,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:20:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:20:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:20:27,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:20:27,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901586973] [2024-02-02 09:20:27,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901586973] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:20:27,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495572198] [2024-02-02 09:20:27,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-02 09:20:27,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:20:27,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:20:27,089 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:20:27,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-02 09:20:27,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-02 09:20:27,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:20:27,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-02 09:20:27,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:21:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:21:24,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:21:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:21:27,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495572198] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:21:27,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:21:27,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-02-02 09:21:27,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356117627] [2024-02-02 09:21:27,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:21:27,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-02 09:21:27,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:21:27,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-02 09:21:27,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=246, Unknown=3, NotChecked=0, Total=342 [2024-02-02 09:21:30,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:21:34,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:21:37,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:21:38,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 77 [2024-02-02 09:21:38,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 295 transitions, 3969 flow. Second operand has 19 states, 19 states have (on average 37.578947368421055) internal successors, (714), 19 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:21:38,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:21:38,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 77 [2024-02-02 09:21:38,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:21:45,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:21:46,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:21:51,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:21:55,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:22:05,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:22:06,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:22:18,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:22:21,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:22:33,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:22:40,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:22:41,114 INFO L124 PetriNetUnfolderBase]: 56845/79059 cut-off events. [2024-02-02 09:22:41,114 INFO L125 PetriNetUnfolderBase]: For 723124/723248 co-relation queries the response was YES. [2024-02-02 09:22:41,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428255 conditions, 79059 events. 56845/79059 cut-off events. For 723124/723248 co-relation queries the response was YES. Maximal size of possible extension queue 4119. Compared 556690 event pairs, 6133 based on Foata normal form. 85/78982 useless extension candidates. Maximal degree in co-relation 428150. Up to 40958 conditions per place. [2024-02-02 09:22:42,153 INFO L140 encePairwiseOnDemand]: 64/77 looper letters, 573 selfloop transitions, 355 changer transitions 27/968 dead transitions. [2024-02-02 09:22:42,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 968 transitions, 12516 flow [2024-02-02 09:22:42,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-02 09:22:42,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-02 09:22:42,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1179 transitions. [2024-02-02 09:22:42,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6959858323494688 [2024-02-02 09:22:42,156 INFO L175 Difference]: Start difference. First operand has 149 places, 295 transitions, 3969 flow. Second operand 22 states and 1179 transitions. [2024-02-02 09:22:42,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 968 transitions, 12516 flow [2024-02-02 09:22:46,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 968 transitions, 11797 flow, removed 354 selfloop flow, removed 2 redundant places. [2024-02-02 09:22:46,636 INFO L231 Difference]: Finished difference. Result has 178 places, 539 transitions, 8667 flow [2024-02-02 09:22:46,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=3634, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8667, PETRI_PLACES=178, PETRI_TRANSITIONS=539} [2024-02-02 09:22:46,637 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 97 predicate places. [2024-02-02 09:22:46,637 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 539 transitions, 8667 flow [2024-02-02 09:22:46,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 37.578947368421055) internal successors, (714), 19 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:22:46,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:22:46,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:22:46,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-02 09:22:46,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:46,850 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:22:46,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:22:46,850 INFO L85 PathProgramCache]: Analyzing trace with hash -280555077, now seen corresponding path program 1 times [2024-02-02 09:22:46,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:22:46,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473166596] [2024-02-02 09:22:46,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:46,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:22:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:22:47,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:22:47,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473166596] [2024-02-02 09:22:47,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473166596] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:22:47,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468087822] [2024-02-02 09:22:47,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:22:47,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:22:47,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:22:47,393 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:22:47,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-02 09:22:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:22:47,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-02 09:22:47,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:24:29,578 WARN L293 SmtUtils]: Spent 10.35s on a formula simplification. DAG size of input: 34 DAG size of output: 33 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-02 09:25:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:25:45,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:26:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:26:10,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468087822] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:26:10,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:26:10,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-02-02 09:26:10,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138748156] [2024-02-02 09:26:10,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:26:10,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-02 09:26:10,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:26:10,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-02 09:26:10,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=240, Unknown=18, NotChecked=0, Total=342 [2024-02-02 09:26:14,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:26:18,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:26:22,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:26:26,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:26:30,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:26:34,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:26:38,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:26:42,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:26:42,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 77 [2024-02-02 09:26:42,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 539 transitions, 8667 flow. Second operand has 19 states, 19 states have (on average 37.36842105263158) internal successors, (710), 19 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:26:42,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:26:42,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 77 [2024-02-02 09:26:42,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-02 09:26:46,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:26:53,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:26:55,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:26:59,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:27:07,818 WARN L293 SmtUtils]: Spent 7.48s on a formula simplification. DAG size of input: 74 DAG size of output: 43 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-02 09:27:11,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:27:15,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:27:17,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:27:22,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:27:26,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:27:27,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:27:32,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:27:36,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:27:37,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:27:41,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:27:45,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:27:50,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.13s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:27:54,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:28:00,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:28:12,558 WARN L293 SmtUtils]: Spent 11.90s on a formula simplification. DAG size of input: 62 DAG size of output: 39 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-02 09:28:17,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:28:31,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:28:43,767 WARN L293 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 40 DAG size of output: 35 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-02 09:28:47,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:28:50,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:28:59,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:03,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.83s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:08,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:13,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:18,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:22,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:26,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:35,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:44,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:45,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:49,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:53,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:29:57,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:30:02,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:30:06,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:30:12,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-02-02 09:30:16,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:30:40,606 INFO L124 PetriNetUnfolderBase]: 103897/142087 cut-off events. [2024-02-02 09:30:40,606 INFO L125 PetriNetUnfolderBase]: For 1908312/1908582 co-relation queries the response was YES. [2024-02-02 09:30:41,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 883352 conditions, 142087 events. 103897/142087 cut-off events. For 1908312/1908582 co-relation queries the response was YES. Maximal size of possible extension queue 7444. Compared 1020491 event pairs, 7813 based on Foata normal form. 270/142240 useless extension candidates. Maximal degree in co-relation 883234. Up to 84796 conditions per place. [2024-02-02 09:30:42,682 INFO L140 encePairwiseOnDemand]: 50/77 looper letters, 1247 selfloop transitions, 1272 changer transitions 25/2557 dead transitions. [2024-02-02 09:30:42,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 2557 transitions, 44003 flow [2024-02-02 09:30:42,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-02 09:30:42,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-02 09:30:42,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1225 transitions. [2024-02-02 09:30:42,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.691699604743083 [2024-02-02 09:30:42,686 INFO L175 Difference]: Start difference. First operand has 178 places, 539 transitions, 8667 flow. Second operand 23 states and 1225 transitions. [2024-02-02 09:30:42,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 2557 transitions, 44003 flow [2024-02-02 09:31:08,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 2557 transitions, 43382 flow, removed 302 selfloop flow, removed 2 redundant places. [2024-02-02 09:31:08,658 INFO L231 Difference]: Finished difference. Result has 209 places, 1777 transitions, 35242 flow [2024-02-02 09:31:08,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=8500, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=35242, PETRI_PLACES=209, PETRI_TRANSITIONS=1777} [2024-02-02 09:31:08,659 INFO L281 CegarLoopForPetriNet]: 81 programPoint places, 128 predicate places. [2024-02-02 09:31:08,659 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 1777 transitions, 35242 flow [2024-02-02 09:31:08,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 37.36842105263158) internal successors, (710), 19 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:31:08,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-02 09:31:08,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-02 09:31:08,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-02-02 09:31:08,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:31:08,871 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (and 39 more)] === [2024-02-02 09:31:08,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-02 09:31:08,872 INFO L85 PathProgramCache]: Analyzing trace with hash 688861433, now seen corresponding path program 2 times [2024-02-02 09:31:08,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-02 09:31:08,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749276502] [2024-02-02 09:31:08,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-02 09:31:08,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-02 09:31:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-02 09:31:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:31:09,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-02 09:31:09,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749276502] [2024-02-02 09:31:09,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749276502] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-02 09:31:09,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245756579] [2024-02-02 09:31:09,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-02 09:31:09,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-02 09:31:09,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-02 09:31:09,288 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-02 09:31:09,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-02 09:31:09,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-02 09:31:09,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-02 09:31:09,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-02 09:31:09,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-02 09:31:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:31:15,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-02 09:31:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-02 09:31:16,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245756579] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-02 09:31:16,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-02 09:31:16,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-02-02 09:31:16,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158539369] [2024-02-02 09:31:16,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-02 09:31:16,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-02 09:31:16,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-02 09:31:16,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-02 09:31:16,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2024-02-02 09:31:18,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-02 09:31:19,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 77 [2024-02-02 09:31:19,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 1777 transitions, 35242 flow. Second operand has 19 states, 19 states have (on average 44.36842105263158) internal successors, (843), 19 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-02 09:31:19,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-02 09:31:19,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 77 [2024-02-02 09:31:19,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand