./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/security.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/security.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fced0e87 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/security.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/security.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-wip.fs.extract-columns-fced0e8-m [2024-01-31 16:11:43,419 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:11:43,504 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:11:43,509 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:11:43,510 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:11:43,540 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:11:43,541 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:11:43,541 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:11:43,542 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:11:43,546 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:11:43,546 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:11:43,547 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:11:43,547 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:11:43,548 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:11:43,549 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:11:43,549 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:11:43,549 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:11:43,550 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:11:43,550 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:11:43,550 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:11:43,550 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:11:43,552 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:11:43,552 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:11:43,552 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:11:43,553 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:11:43,553 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:11:43,553 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:11:43,553 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:11:43,554 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:11:43,554 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:11:43,555 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:11:43,555 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:11:43,555 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:11:43,556 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:11:43,556 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:11:43,556 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:11:43,556 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:11:43,556 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:11:43,557 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:11:43,557 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:11:43,557 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:11:43,557 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:11:43,557 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:11:43,558 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:11:43,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:11:43,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:11:43,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:11:43,843 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:11:43,844 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:11:43,845 INFO L431 ainManager$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/security.wvr.yml/witness.yml [2024-01-31 16:11:43,949 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:11:43,950 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:11:43,950 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/security.wvr.c [2024-01-31 16:11:45,054 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:11:45,262 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:11:45,262 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/security.wvr.c [2024-01-31 16:11:45,271 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d524f106a/cbb14053c1f241a6b90e93cdb0b5c850/FLAG360817261 [2024-01-31 16:11:45,617 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d524f106a/cbb14053c1f241a6b90e93cdb0b5c850 [2024-01-31 16:11:45,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:11:45,619 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:11:45,620 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:11:45,620 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:11:45,625 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:11:45,625 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:11:43" (1/2) ... [2024-01-31 16:11:45,626 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c699eed and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:45, skipping insertion in model container [2024-01-31 16:11:45,627 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:11:43" (1/2) ... [2024-01-31 16:11:45,628 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@217d043c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:11:45, skipping insertion in model container [2024-01-31 16:11:45,628 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:11:45" (2/2) ... [2024-01-31 16:11:45,628 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c699eed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:45, skipping insertion in model container [2024-01-31 16:11:45,629 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:11:45" (2/2) ... [2024-01-31 16:11:45,629 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:11:45,651 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:11:45,653 INFO L98 nessWitnessExtractor]: Location invariant before [L58-L58] (unsigned long )_argptr == 0UL [2024-01-31 16:11:45,653 INFO L98 nessWitnessExtractor]: Location invariant before [L55-L55] (unsigned long )_argptr == 0UL [2024-01-31 16:11:45,653 INFO L98 nessWitnessExtractor]: Location invariant before [L48-L48] (unsigned long )_argptr == 0UL [2024-01-31 16:11:45,653 INFO L98 nessWitnessExtractor]: Location invariant before [L62-L62] (unsigned long )_argptr == 0UL [2024-01-31 16:11:45,653 INFO L98 nessWitnessExtractor]: Location invariant before [L44-L44] (unsigned long )_argptr == 0UL [2024-01-31 16:11:45,653 INFO L98 nessWitnessExtractor]: Location invariant before [L70-L70] (((((x1 == 0U) && (z1 == 0U)) && (l1 == 0U)) && (x2 == 0U)) && (z2 == 0U)) && (l2 == 0U) [2024-01-31 16:11:45,654 INFO L98 nessWitnessExtractor]: Location invariant before [L42-L42] (unsigned long )_argptr == 0UL [2024-01-31 16:11:45,654 INFO L98 nessWitnessExtractor]: Location invariant before [L54-L54] (unsigned long )_argptr == 0UL [2024-01-31 16:11:45,654 INFO L98 nessWitnessExtractor]: Location invariant before [L56-L56] (unsigned long )_argptr == 0UL [2024-01-31 16:11:45,654 INFO L98 nessWitnessExtractor]: Location invariant before [L46-L46] (unsigned long )_argptr == 0UL [2024-01-31 16:11:45,654 INFO L98 nessWitnessExtractor]: Location invariant before [L68-L68] ((((((y == 0U) && (x1 == 0U)) && (z1 == 0U)) && (l1 == 0U)) && (x2 == 0U)) && (z2 == 0U)) && (l2 == 0U) [2024-01-31 16:11:45,654 INFO L98 nessWitnessExtractor]: Location invariant before [L43-L43] (unsigned long )_argptr == 0UL [2024-01-31 16:11:45,655 INFO L98 nessWitnessExtractor]: Location invariant before [L50-L50] (unsigned long )_argptr == 0UL [2024-01-31 16:11:45,655 INFO L98 nessWitnessExtractor]: Location invariant before [L60-L60] (unsigned long )_argptr == 0UL [2024-01-31 16:11:45,676 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:11:45,882 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/security.wvr.c[1957,1970] [2024-01-31 16:11:45,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:11:45,895 INFO L204 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-01-31 16:11:45,940 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/security.wvr.c[1957,1970] [2024-01-31 16:11:45,941 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:11:45,955 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:11:45,956 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:45 WrapperNode [2024-01-31 16:11:45,956 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:11:45,957 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:11:45,957 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:11:45,958 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:11:45,964 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:45" (1/1) ... [2024-01-31 16:11:45,972 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:45" (1/1) ... [2024-01-31 16:11:45,989 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2024-01-31 16:11:45,989 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:11:45,990 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:11:45,990 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:11:45,990 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:11:46,001 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:45" (1/1) ... [2024-01-31 16:11:46,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:45" (1/1) ... [2024-01-31 16:11:46,003 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:45" (1/1) ... [2024-01-31 16:11:46,016 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-31 16:11:46,016 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:45" (1/1) ... [2024-01-31 16:11:46,017 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:45" (1/1) ... [2024-01-31 16:11:46,022 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:45" (1/1) ... [2024-01-31 16:11:46,024 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:45" (1/1) ... [2024-01-31 16:11:46,025 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:45" (1/1) ... [2024-01-31 16:11:46,026 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:45" (1/1) ... [2024-01-31 16:11:46,028 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:11:46,029 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:11:46,029 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:11:46,029 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:11:46,030 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:45" (1/1) ... [2024-01-31 16:11:46,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:11:46,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:46,056 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-31 16:11:46,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 16:11:46,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:11:46,105 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 16:11:46,106 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 16:11:46,106 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 16:11:46,106 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 16:11:46,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:11:46,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:11:46,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:11:46,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:11:46,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:11:46,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:11:46,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:11:46,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:11:46,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:11:46,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:11:46,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:11:46,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:11:46,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:11:46,109 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:11:46,202 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:11:46,204 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:11:46,391 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:11:46,392 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:11:46,549 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:11:46,550 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-01-31 16:11:46,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:11:46 BoogieIcfgContainer [2024-01-31 16:11:46,550 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:11:46,552 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:11:46,552 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:11:46,564 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:11:46,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:11:43" (1/4) ... [2024-01-31 16:11:46,565 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a76850 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:11:46, skipping insertion in model container [2024-01-31 16:11:46,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:11:45" (2/4) ... [2024-01-31 16:11:46,566 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a76850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:11:46, skipping insertion in model container [2024-01-31 16:11:46,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:11:45" (3/4) ... [2024-01-31 16:11:46,567 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a76850 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:11:46, skipping insertion in model container [2024-01-31 16:11:46,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:11:46" (4/4) ... [2024-01-31 16:11:46,569 INFO L112 eAbstractionObserver]: Analyzing ICFG security.wvr.c [2024-01-31 16:11:46,585 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:11:46,586 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2024-01-31 16:11:46,586 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:11:46,676 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 16:11:46,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 47 transitions, 108 flow [2024-01-31 16:11:46,772 INFO L124 PetriNetUnfolderBase]: 2/45 cut-off events. [2024-01-31 16:11:46,772 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:11:46,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 45 events. 2/45 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2024-01-31 16:11:46,777 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 47 transitions, 108 flow [2024-01-31 16:11:46,780 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 44 transitions, 100 flow [2024-01-31 16:11:46,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:11:46,794 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;@7742e77c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:11:46,794 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2024-01-31 16:11:46,796 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:11:46,796 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:11:46,797 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:11:46,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:46,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:11:46,798 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:46,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:46,802 INFO L85 PathProgramCache]: Analyzing trace with hash 8009, now seen corresponding path program 1 times [2024-01-31 16:11:46,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:46,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265225155] [2024-01-31 16:11:46,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:46,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:47,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:47,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265225155] [2024-01-31 16:11:47,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265225155] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:47,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:47,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:11:47,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745845871] [2024-01-31 16:11:47,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:47,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:11:47,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:47,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:11:47,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:11:47,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 47 [2024-01-31 16:11:47,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:47,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:47,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 47 [2024-01-31 16:11:47,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:47,614 INFO L124 PetriNetUnfolderBase]: 225/487 cut-off events. [2024-01-31 16:11:47,615 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-01-31 16:11:47,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 487 events. 225/487 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2261 event pairs, 189 based on Foata normal form. 0/449 useless extension candidates. Maximal degree in co-relation 815. Up to 391 conditions per place. [2024-01-31 16:11:47,624 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 26 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2024-01-31 16:11:47,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 43 transitions, 154 flow [2024-01-31 16:11:47,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:11:47,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:11:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-01-31 16:11:47,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2024-01-31 16:11:47,638 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 100 flow. Second operand 3 states and 80 transitions. [2024-01-31 16:11:47,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 43 transitions, 154 flow [2024-01-31 16:11:47,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 146 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 16:11:47,647 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 94 flow [2024-01-31 16:11:47,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-01-31 16:11:47,654 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2024-01-31 16:11:47,655 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 94 flow [2024-01-31 16:11:47,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:47,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:47,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-01-31 16:11:47,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:11:47,656 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:47,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:47,658 INFO L85 PathProgramCache]: Analyzing trace with hash 248534, now seen corresponding path program 1 times [2024-01-31 16:11:47,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:47,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240454038] [2024-01-31 16:11:47,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:47,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:47,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:47,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:47,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240454038] [2024-01-31 16:11:47,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240454038] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:47,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:47,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:11:47,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275667877] [2024-01-31 16:11:47,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:47,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:11:47,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:47,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:11:47,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:11:47,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-01-31 16:11:47,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:47,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:47,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-01-31 16:11:47,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:47,969 INFO L124 PetriNetUnfolderBase]: 225/491 cut-off events. [2024-01-31 16:11:47,970 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 16:11:47,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 491 events. 225/491 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2290 event pairs, 98 based on Foata normal form. 0/455 useless extension candidates. Maximal degree in co-relation 886. Up to 384 conditions per place. [2024-01-31 16:11:47,978 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 29 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2024-01-31 16:11:47,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 167 flow [2024-01-31 16:11:47,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:11:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:11:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-01-31 16:11:47,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-01-31 16:11:47,987 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 94 flow. Second operand 3 states and 87 transitions. [2024-01-31 16:11:47,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 167 flow [2024-01-31 16:11:47,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 163 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:47,990 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 105 flow [2024-01-31 16:11:47,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2024-01-31 16:11:47,991 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2024-01-31 16:11:47,991 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 105 flow [2024-01-31 16:11:47,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:47,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:47,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-01-31 16:11:47,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:11:47,992 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:47,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:47,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1185570225, now seen corresponding path program 1 times [2024-01-31 16:11:47,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:47,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923521611] [2024-01-31 16:11:47,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:47,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:48,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:48,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:48,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923521611] [2024-01-31 16:11:48,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923521611] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:48,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:48,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:11:48,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949427382] [2024-01-31 16:11:48,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:48,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:48,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:48,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:48,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:48,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-01-31 16:11:48,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:48,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:48,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-01-31 16:11:48,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:48,241 INFO L124 PetriNetUnfolderBase]: 251/516 cut-off events. [2024-01-31 16:11:48,242 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-01-31 16:11:48,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 516 events. 251/516 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2295 event pairs, 105 based on Foata normal form. 18/496 useless extension candidates. Maximal degree in co-relation 375. Up to 404 conditions per place. [2024-01-31 16:11:48,246 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 39 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2024-01-31 16:11:48,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 201 flow [2024-01-31 16:11:48,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:11:48,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:11:48,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-01-31 16:11:48,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946808510638298 [2024-01-31 16:11:48,251 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 105 flow. Second operand 4 states and 93 transitions. [2024-01-31 16:11:48,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 201 flow [2024-01-31 16:11:48,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:11:48,254 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 94 flow [2024-01-31 16:11:48,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2024-01-31 16:11:48,255 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2024-01-31 16:11:48,255 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 94 flow [2024-01-31 16:11:48,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:48,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:48,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:48,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:11:48,256 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:48,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:48,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1167180221, now seen corresponding path program 1 times [2024-01-31 16:11:48,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:48,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455369519] [2024-01-31 16:11:48,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:48,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:48,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:48,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455369519] [2024-01-31 16:11:48,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455369519] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:48,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:48,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:11:48,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61301432] [2024-01-31 16:11:48,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:48,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:11:48,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:48,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:11:48,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:11:48,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-01-31 16:11:48,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:48,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:48,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-01-31 16:11:48,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:48,494 INFO L124 PetriNetUnfolderBase]: 251/436 cut-off events. [2024-01-31 16:11:48,494 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-01-31 16:11:48,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 924 conditions, 436 events. 251/436 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1600 event pairs, 7 based on Foata normal form. 18/415 useless extension candidates. Maximal degree in co-relation 907. Up to 372 conditions per place. [2024-01-31 16:11:48,496 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 47 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-01-31 16:11:48,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 51 transitions, 223 flow [2024-01-31 16:11:48,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:11:48,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:11:48,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-01-31 16:11:48,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372340425531915 [2024-01-31 16:11:48,498 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 94 flow. Second operand 4 states and 101 transitions. [2024-01-31 16:11:48,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 51 transitions, 223 flow [2024-01-31 16:11:48,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 51 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:48,502 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 83 flow [2024-01-31 16:11:48,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=83, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-01-31 16:11:48,503 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -12 predicate places. [2024-01-31 16:11:48,504 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 83 flow [2024-01-31 16:11:48,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:48,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:48,504 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] [2024-01-31 16:11:48,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:11:48,505 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:48,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:48,505 INFO L85 PathProgramCache]: Analyzing trace with hash -926482818, now seen corresponding path program 1 times [2024-01-31 16:11:48,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:48,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117059709] [2024-01-31 16:11:48,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:48,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:48,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:48,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117059709] [2024-01-31 16:11:48,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117059709] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:48,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:48,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:11:48,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973458809] [2024-01-31 16:11:48,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:48,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:11:48,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:48,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:11:48,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:11:48,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:48,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 83 flow. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:48,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:48,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:48,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:49,077 INFO L124 PetriNetUnfolderBase]: 313/574 cut-off events. [2024-01-31 16:11:49,078 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-01-31 16:11:49,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 574 events. 313/574 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2327 event pairs, 101 based on Foata normal form. 1/528 useless extension candidates. Maximal degree in co-relation 1202. Up to 194 conditions per place. [2024-01-31 16:11:49,081 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 66 selfloop transitions, 8 changer transitions 13/90 dead transitions. [2024-01-31 16:11:49,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 90 transitions, 395 flow [2024-01-31 16:11:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:11:49,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:11:49,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-01-31 16:11:49,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6329787234042553 [2024-01-31 16:11:49,083 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 83 flow. Second operand 8 states and 238 transitions. [2024-01-31 16:11:49,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 90 transitions, 395 flow [2024-01-31 16:11:49,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 90 transitions, 386 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:49,085 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 129 flow [2024-01-31 16:11:49,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=129, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2024-01-31 16:11:49,086 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2024-01-31 16:11:49,086 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 129 flow [2024-01-31 16:11:49,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:49,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:49,086 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] [2024-01-31 16:11:49,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:11:49,087 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:49,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:49,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1870339434, now seen corresponding path program 2 times [2024-01-31 16:11:49,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:49,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847995122] [2024-01-31 16:11:49,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:49,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:49,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:49,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:49,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847995122] [2024-01-31 16:11:49,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847995122] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:49,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:49,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:11:49,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235604279] [2024-01-31 16:11:49,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:49,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:11:49,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:49,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:11:49,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:11:49,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:49,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 129 flow. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:49,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:49,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:49,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:49,575 INFO L124 PetriNetUnfolderBase]: 399/765 cut-off events. [2024-01-31 16:11:49,575 INFO L125 PetriNetUnfolderBase]: For 290/290 co-relation queries the response was YES. [2024-01-31 16:11:49,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1901 conditions, 765 events. 399/765 cut-off events. For 290/290 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3564 event pairs, 127 based on Foata normal form. 1/713 useless extension candidates. Maximal degree in co-relation 1879. Up to 299 conditions per place. [2024-01-31 16:11:49,580 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 73 selfloop transitions, 15 changer transitions 8/99 dead transitions. [2024-01-31 16:11:49,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 99 transitions, 510 flow [2024-01-31 16:11:49,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:11:49,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:11:49,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 260 transitions. [2024-01-31 16:11:49,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146572104018913 [2024-01-31 16:11:49,582 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 129 flow. Second operand 9 states and 260 transitions. [2024-01-31 16:11:49,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 99 transitions, 510 flow [2024-01-31 16:11:49,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 99 transitions, 498 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:49,590 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 226 flow [2024-01-31 16:11:49,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=226, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2024-01-31 16:11:49,592 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2024-01-31 16:11:49,592 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 226 flow [2024-01-31 16:11:49,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:49,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:49,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:49,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:11:49,593 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:49,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:49,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1498951988, now seen corresponding path program 3 times [2024-01-31 16:11:49,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:49,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070005361] [2024-01-31 16:11:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:49,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:49,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:49,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070005361] [2024-01-31 16:11:49,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070005361] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:49,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:49,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:11:49,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925242783] [2024-01-31 16:11:49,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:49,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:11:49,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:49,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:11:49,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:11:49,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:49,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 226 flow. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:49,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:49,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:49,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:50,066 INFO L124 PetriNetUnfolderBase]: 391/751 cut-off events. [2024-01-31 16:11:50,066 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2024-01-31 16:11:50,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 751 events. 391/751 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3501 event pairs, 127 based on Foata normal form. 1/699 useless extension candidates. Maximal degree in co-relation 1975. Up to 273 conditions per place. [2024-01-31 16:11:50,071 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 75 selfloop transitions, 15 changer transitions 9/102 dead transitions. [2024-01-31 16:11:50,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 102 transitions, 577 flow [2024-01-31 16:11:50,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:11:50,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:11:50,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 263 transitions. [2024-01-31 16:11:50,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217494089834515 [2024-01-31 16:11:50,072 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 226 flow. Second operand 9 states and 263 transitions. [2024-01-31 16:11:50,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 102 transitions, 577 flow [2024-01-31 16:11:50,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 102 transitions, 560 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-01-31 16:11:50,078 INFO L231 Difference]: Finished difference. Result has 65 places, 48 transitions, 268 flow [2024-01-31 16:11:50,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=268, PETRI_PLACES=65, PETRI_TRANSITIONS=48} [2024-01-31 16:11:50,079 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2024-01-31 16:11:50,079 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 48 transitions, 268 flow [2024-01-31 16:11:50,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:50,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:50,080 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] [2024-01-31 16:11:50,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:11:50,080 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:50,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:50,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1217496040, now seen corresponding path program 4 times [2024-01-31 16:11:50,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:50,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826424964] [2024-01-31 16:11:50,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:50,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:50,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:50,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826424964] [2024-01-31 16:11:50,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826424964] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:50,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:50,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:11:50,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435311814] [2024-01-31 16:11:50,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:50,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:11:50,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:50,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:11:50,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:11:50,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:50,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 48 transitions, 268 flow. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:50,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:50,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:50,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:50,572 INFO L124 PetriNetUnfolderBase]: 377/716 cut-off events. [2024-01-31 16:11:50,573 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2024-01-31 16:11:50,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2026 conditions, 716 events. 377/716 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3242 event pairs, 127 based on Foata normal form. 1/664 useless extension candidates. Maximal degree in co-relation 1995. Up to 273 conditions per place. [2024-01-31 16:11:50,578 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 64 selfloop transitions, 12 changer transitions 14/93 dead transitions. [2024-01-31 16:11:50,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 93 transitions, 561 flow [2024-01-31 16:11:50,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:11:50,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:11:50,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-01-31 16:11:50,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-01-31 16:11:50,579 INFO L175 Difference]: Start difference. First operand has 65 places, 48 transitions, 268 flow. Second operand 8 states and 235 transitions. [2024-01-31 16:11:50,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 93 transitions, 561 flow [2024-01-31 16:11:50,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 93 transitions, 530 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-01-31 16:11:50,584 INFO L231 Difference]: Finished difference. Result has 67 places, 45 transitions, 240 flow [2024-01-31 16:11:50,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=240, PETRI_PLACES=67, PETRI_TRANSITIONS=45} [2024-01-31 16:11:50,585 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 18 predicate places. [2024-01-31 16:11:50,585 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 45 transitions, 240 flow [2024-01-31 16:11:50,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:50,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:50,585 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] [2024-01-31 16:11:50,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 16:11:50,586 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:50,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:50,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1040192137, now seen corresponding path program 1 times [2024-01-31 16:11:50,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:50,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066565109] [2024-01-31 16:11:50,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:50,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:50,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:50,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066565109] [2024-01-31 16:11:50,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066565109] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:50,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:50,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:11:50,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297427182] [2024-01-31 16:11:50,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:50,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:11:50,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:50,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:11:50,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:11:50,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:50,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 45 transitions, 240 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:50,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:50,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:50,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:51,095 INFO L124 PetriNetUnfolderBase]: 389/749 cut-off events. [2024-01-31 16:11:51,095 INFO L125 PetriNetUnfolderBase]: For 730/730 co-relation queries the response was YES. [2024-01-31 16:11:51,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2115 conditions, 749 events. 389/749 cut-off events. For 730/730 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3428 event pairs, 36 based on Foata normal form. 1/697 useless extension candidates. Maximal degree in co-relation 2085. Up to 250 conditions per place. [2024-01-31 16:11:51,101 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 66 selfloop transitions, 26 changer transitions 8/103 dead transitions. [2024-01-31 16:11:51,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 103 transitions, 653 flow [2024-01-31 16:11:51,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:11:51,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:11:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 298 transitions. [2024-01-31 16:11:51,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5764023210831721 [2024-01-31 16:11:51,103 INFO L175 Difference]: Start difference. First operand has 67 places, 45 transitions, 240 flow. Second operand 11 states and 298 transitions. [2024-01-31 16:11:51,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 103 transitions, 653 flow [2024-01-31 16:11:51,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 103 transitions, 614 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-01-31 16:11:51,108 INFO L231 Difference]: Finished difference. Result has 70 places, 54 transitions, 363 flow [2024-01-31 16:11:51,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=363, PETRI_PLACES=70, PETRI_TRANSITIONS=54} [2024-01-31 16:11:51,109 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 21 predicate places. [2024-01-31 16:11:51,109 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 54 transitions, 363 flow [2024-01-31 16:11:51,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:51,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:51,110 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] [2024-01-31 16:11:51,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 16:11:51,110 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:51,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:51,111 INFO L85 PathProgramCache]: Analyzing trace with hash 615165497, now seen corresponding path program 2 times [2024-01-31 16:11:51,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:51,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398463871] [2024-01-31 16:11:51,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:51,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:51,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:51,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398463871] [2024-01-31 16:11:51,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398463871] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:51,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:51,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:11:51,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932888915] [2024-01-31 16:11:51,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:51,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:11:51,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:51,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:11:51,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:11:51,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:51,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 54 transitions, 363 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:51,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:51,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:51,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:51,673 INFO L124 PetriNetUnfolderBase]: 436/849 cut-off events. [2024-01-31 16:11:51,673 INFO L125 PetriNetUnfolderBase]: For 943/943 co-relation queries the response was YES. [2024-01-31 16:11:51,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2583 conditions, 849 events. 436/849 cut-off events. For 943/943 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4146 event pairs, 123 based on Foata normal form. 1/789 useless extension candidates. Maximal degree in co-relation 2551. Up to 273 conditions per place. [2024-01-31 16:11:51,680 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 84 selfloop transitions, 25 changer transitions 12/124 dead transitions. [2024-01-31 16:11:51,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 124 transitions, 833 flow [2024-01-31 16:11:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:11:51,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:11:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 316 transitions. [2024-01-31 16:11:51,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6112185686653772 [2024-01-31 16:11:51,683 INFO L175 Difference]: Start difference. First operand has 70 places, 54 transitions, 363 flow. Second operand 11 states and 316 transitions. [2024-01-31 16:11:51,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 124 transitions, 833 flow [2024-01-31 16:11:51,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 124 transitions, 795 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-01-31 16:11:51,692 INFO L231 Difference]: Finished difference. Result has 83 places, 61 transitions, 483 flow [2024-01-31 16:11:51,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=483, PETRI_PLACES=83, PETRI_TRANSITIONS=61} [2024-01-31 16:11:51,693 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 34 predicate places. [2024-01-31 16:11:51,693 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 61 transitions, 483 flow [2024-01-31 16:11:51,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:51,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:51,694 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] [2024-01-31 16:11:51,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-31 16:11:51,694 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:51,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:51,695 INFO L85 PathProgramCache]: Analyzing trace with hash -415654739, now seen corresponding path program 3 times [2024-01-31 16:11:51,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:51,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097569426] [2024-01-31 16:11:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:51,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:51,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:51,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097569426] [2024-01-31 16:11:51,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097569426] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:51,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:51,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:11:51,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492607188] [2024-01-31 16:11:51,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:51,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:11:51,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:51,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:11:51,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:11:51,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:51,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 61 transitions, 483 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:51,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:51,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:51,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:52,233 INFO L124 PetriNetUnfolderBase]: 436/851 cut-off events. [2024-01-31 16:11:52,233 INFO L125 PetriNetUnfolderBase]: For 1470/1470 co-relation queries the response was YES. [2024-01-31 16:11:52,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2707 conditions, 851 events. 436/851 cut-off events. For 1470/1470 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4107 event pairs, 50 based on Foata normal form. 1/791 useless extension candidates. Maximal degree in co-relation 2669. Up to 352 conditions per place. [2024-01-31 16:11:52,240 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 65 selfloop transitions, 27 changer transitions 17/112 dead transitions. [2024-01-31 16:11:52,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 112 transitions, 845 flow [2024-01-31 16:11:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:11:52,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:11:52,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 280 transitions. [2024-01-31 16:11:52,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-01-31 16:11:52,242 INFO L175 Difference]: Start difference. First operand has 83 places, 61 transitions, 483 flow. Second operand 10 states and 280 transitions. [2024-01-31 16:11:52,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 112 transitions, 845 flow [2024-01-31 16:11:52,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 112 transitions, 800 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-01-31 16:11:52,256 INFO L231 Difference]: Finished difference. Result has 90 places, 61 transitions, 516 flow [2024-01-31 16:11:52,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=516, PETRI_PLACES=90, PETRI_TRANSITIONS=61} [2024-01-31 16:11:52,257 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 41 predicate places. [2024-01-31 16:11:52,257 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 61 transitions, 516 flow [2024-01-31 16:11:52,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:52,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:52,257 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] [2024-01-31 16:11:52,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-31 16:11:52,258 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:52,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:52,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1762277429, now seen corresponding path program 4 times [2024-01-31 16:11:52,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:52,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472981750] [2024-01-31 16:11:52,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:52,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:52,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:52,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472981750] [2024-01-31 16:11:52,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472981750] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:52,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:52,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:11:52,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924800303] [2024-01-31 16:11:52,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:52,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:11:52,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:52,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:11:52,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:11:52,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:52,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 61 transitions, 516 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:52,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:52,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:52,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:52,809 INFO L124 PetriNetUnfolderBase]: 440/876 cut-off events. [2024-01-31 16:11:52,810 INFO L125 PetriNetUnfolderBase]: For 1641/1641 co-relation queries the response was YES. [2024-01-31 16:11:52,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2839 conditions, 876 events. 440/876 cut-off events. For 1641/1641 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4401 event pairs, 127 based on Foata normal form. 1/816 useless extension candidates. Maximal degree in co-relation 2799. Up to 273 conditions per place. [2024-01-31 16:11:52,816 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 83 selfloop transitions, 21 changer transitions 19/126 dead transitions. [2024-01-31 16:11:52,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 126 transitions, 937 flow [2024-01-31 16:11:52,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:11:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:11:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 298 transitions. [2024-01-31 16:11:52,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340425531914894 [2024-01-31 16:11:52,818 INFO L175 Difference]: Start difference. First operand has 90 places, 61 transitions, 516 flow. Second operand 10 states and 298 transitions. [2024-01-31 16:11:52,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 126 transitions, 937 flow [2024-01-31 16:11:52,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 126 transitions, 900 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-01-31 16:11:52,829 INFO L231 Difference]: Finished difference. Result has 94 places, 60 transitions, 518 flow [2024-01-31 16:11:52,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=518, PETRI_PLACES=94, PETRI_TRANSITIONS=60} [2024-01-31 16:11:52,829 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 45 predicate places. [2024-01-31 16:11:52,829 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 60 transitions, 518 flow [2024-01-31 16:11:52,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:52,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:52,830 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] [2024-01-31 16:11:52,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-31 16:11:52,830 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:52,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:52,831 INFO L85 PathProgramCache]: Analyzing trace with hash -452269670, now seen corresponding path program 5 times [2024-01-31 16:11:52,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:52,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994654290] [2024-01-31 16:11:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:52,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:52,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:52,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994654290] [2024-01-31 16:11:52,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994654290] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:52,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:52,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:11:52,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579193440] [2024-01-31 16:11:52,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:52,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:11:52,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:52,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:11:52,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:11:52,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:52,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 60 transitions, 518 flow. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:52,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:52,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:52,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:53,218 INFO L124 PetriNetUnfolderBase]: 406/816 cut-off events. [2024-01-31 16:11:53,218 INFO L125 PetriNetUnfolderBase]: For 1600/1600 co-relation queries the response was YES. [2024-01-31 16:11:53,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2691 conditions, 816 events. 406/816 cut-off events. For 1600/1600 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4038 event pairs, 175 based on Foata normal form. 1/762 useless extension candidates. Maximal degree in co-relation 2651. Up to 387 conditions per place. [2024-01-31 16:11:53,225 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 74 selfloop transitions, 16 changer transitions 11/104 dead transitions. [2024-01-31 16:11:53,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 104 transitions, 840 flow [2024-01-31 16:11:53,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:11:53,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:11:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-01-31 16:11:53,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6223404255319149 [2024-01-31 16:11:53,227 INFO L175 Difference]: Start difference. First operand has 94 places, 60 transitions, 518 flow. Second operand 8 states and 234 transitions. [2024-01-31 16:11:53,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 104 transitions, 840 flow [2024-01-31 16:11:53,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 104 transitions, 791 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-01-31 16:11:53,252 INFO L231 Difference]: Finished difference. Result has 94 places, 60 transitions, 504 flow [2024-01-31 16:11:53,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=504, PETRI_PLACES=94, PETRI_TRANSITIONS=60} [2024-01-31 16:11:53,254 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 45 predicate places. [2024-01-31 16:11:53,254 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 60 transitions, 504 flow [2024-01-31 16:11:53,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:53,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:53,255 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] [2024-01-31 16:11:53,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-31 16:11:53,255 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:53,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:53,256 INFO L85 PathProgramCache]: Analyzing trace with hash -272619959, now seen corresponding path program 5 times [2024-01-31 16:11:53,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:53,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63862571] [2024-01-31 16:11:53,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:53,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:53,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:53,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63862571] [2024-01-31 16:11:53,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63862571] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:53,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:53,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:11:53,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396541934] [2024-01-31 16:11:53,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:53,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:11:53,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:53,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:11:53,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:11:53,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:53,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 60 transitions, 504 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:53,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:53,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:53,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:53,742 INFO L124 PetriNetUnfolderBase]: 392/783 cut-off events. [2024-01-31 16:11:53,742 INFO L125 PetriNetUnfolderBase]: For 1517/1517 co-relation queries the response was YES. [2024-01-31 16:11:53,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2577 conditions, 783 events. 392/783 cut-off events. For 1517/1517 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3809 event pairs, 125 based on Foata normal form. 1/729 useless extension candidates. Maximal degree in co-relation 2537. Up to 273 conditions per place. [2024-01-31 16:11:53,748 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 75 selfloop transitions, 19 changer transitions 21/118 dead transitions. [2024-01-31 16:11:53,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 118 transitions, 883 flow [2024-01-31 16:11:53,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:11:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:11:53,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 310 transitions. [2024-01-31 16:11:53,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5996131528046421 [2024-01-31 16:11:53,750 INFO L175 Difference]: Start difference. First operand has 94 places, 60 transitions, 504 flow. Second operand 11 states and 310 transitions. [2024-01-31 16:11:53,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 118 transitions, 883 flow [2024-01-31 16:11:53,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 118 transitions, 843 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-01-31 16:11:53,759 INFO L231 Difference]: Finished difference. Result has 99 places, 57 transitions, 473 flow [2024-01-31 16:11:53,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=473, PETRI_PLACES=99, PETRI_TRANSITIONS=57} [2024-01-31 16:11:53,760 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 50 predicate places. [2024-01-31 16:11:53,760 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 57 transitions, 473 flow [2024-01-31 16:11:53,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:53,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:53,761 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] [2024-01-31 16:11:53,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-31 16:11:53,761 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:53,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:53,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1027351666, now seen corresponding path program 6 times [2024-01-31 16:11:53,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:53,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253893534] [2024-01-31 16:11:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:53,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:53,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:53,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253893534] [2024-01-31 16:11:53,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253893534] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:53,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:53,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 16:11:53,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687765026] [2024-01-31 16:11:53,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:53,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:11:53,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:53,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:11:53,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-01-31 16:11:53,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:53,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 57 transitions, 473 flow. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:53,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:53,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:53,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:54,177 INFO L124 PetriNetUnfolderBase]: 373/733 cut-off events. [2024-01-31 16:11:54,178 INFO L125 PetriNetUnfolderBase]: For 1496/1496 co-relation queries the response was YES. [2024-01-31 16:11:54,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2447 conditions, 733 events. 373/733 cut-off events. For 1496/1496 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3437 event pairs, 156 based on Foata normal form. 1/681 useless extension candidates. Maximal degree in co-relation 2407. Up to 353 conditions per place. [2024-01-31 16:11:54,183 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 66 selfloop transitions, 13 changer transitions 14/96 dead transitions. [2024-01-31 16:11:54,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 96 transitions, 752 flow [2024-01-31 16:11:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:11:54,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:11:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-01-31 16:11:54,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6143617021276596 [2024-01-31 16:11:54,185 INFO L175 Difference]: Start difference. First operand has 99 places, 57 transitions, 473 flow. Second operand 8 states and 231 transitions. [2024-01-31 16:11:54,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 96 transitions, 752 flow [2024-01-31 16:11:54,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 96 transitions, 707 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-01-31 16:11:54,193 INFO L231 Difference]: Finished difference. Result has 92 places, 54 transitions, 410 flow [2024-01-31 16:11:54,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=410, PETRI_PLACES=92, PETRI_TRANSITIONS=54} [2024-01-31 16:11:54,195 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 43 predicate places. [2024-01-31 16:11:54,195 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 54 transitions, 410 flow [2024-01-31 16:11:54,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:54,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:54,196 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] [2024-01-31 16:11:54,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-01-31 16:11:54,196 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:54,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:54,197 INFO L85 PathProgramCache]: Analyzing trace with hash 377877627, now seen corresponding path program 6 times [2024-01-31 16:11:54,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:54,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007911305] [2024-01-31 16:11:54,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:54,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:54,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:54,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007911305] [2024-01-31 16:11:54,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007911305] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:54,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:54,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:11:54,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135723068] [2024-01-31 16:11:54,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:54,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:11:54,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:54,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:11:54,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:11:54,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:54,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 54 transitions, 410 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:54,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:54,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:54,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:54,647 INFO L124 PetriNetUnfolderBase]: 370/728 cut-off events. [2024-01-31 16:11:54,647 INFO L125 PetriNetUnfolderBase]: For 1339/1339 co-relation queries the response was YES. [2024-01-31 16:11:54,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2365 conditions, 728 events. 370/728 cut-off events. For 1339/1339 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3380 event pairs, 42 based on Foata normal form. 1/676 useless extension candidates. Maximal degree in co-relation 2327. Up to 264 conditions per place. [2024-01-31 16:11:54,652 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 60 selfloop transitions, 23 changer transitions 11/97 dead transitions. [2024-01-31 16:11:54,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 97 transitions, 703 flow [2024-01-31 16:11:54,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:11:54,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:11:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 272 transitions. [2024-01-31 16:11:54,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5787234042553191 [2024-01-31 16:11:54,653 INFO L175 Difference]: Start difference. First operand has 92 places, 54 transitions, 410 flow. Second operand 10 states and 272 transitions. [2024-01-31 16:11:54,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 97 transitions, 703 flow [2024-01-31 16:11:54,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 97 transitions, 674 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-01-31 16:11:54,661 INFO L231 Difference]: Finished difference. Result has 92 places, 53 transitions, 419 flow [2024-01-31 16:11:54,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=419, PETRI_PLACES=92, PETRI_TRANSITIONS=53} [2024-01-31 16:11:54,662 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 43 predicate places. [2024-01-31 16:11:54,662 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 53 transitions, 419 flow [2024-01-31 16:11:54,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:54,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:54,663 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] [2024-01-31 16:11:54,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-01-31 16:11:54,663 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:54,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:54,663 INFO L85 PathProgramCache]: Analyzing trace with hash 707787569, now seen corresponding path program 7 times [2024-01-31 16:11:54,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:54,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288512494] [2024-01-31 16:11:54,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:54,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:54,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:54,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288512494] [2024-01-31 16:11:54,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288512494] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:54,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:54,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:11:54,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913114264] [2024-01-31 16:11:54,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:54,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:11:54,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:54,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:11:54,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:11:54,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:54,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 53 transitions, 419 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:54,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:54,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:54,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:55,131 INFO L124 PetriNetUnfolderBase]: 362/716 cut-off events. [2024-01-31 16:11:55,132 INFO L125 PetriNetUnfolderBase]: For 1403/1403 co-relation queries the response was YES. [2024-01-31 16:11:55,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2391 conditions, 716 events. 362/716 cut-off events. For 1403/1403 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3302 event pairs, 36 based on Foata normal form. 1/664 useless extension candidates. Maximal degree in co-relation 2353. Up to 342 conditions per place. [2024-01-31 16:11:55,136 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 71 selfloop transitions, 18 changer transitions 10/102 dead transitions. [2024-01-31 16:11:55,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 102 transitions, 744 flow [2024-01-31 16:11:55,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:11:55,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:11:55,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 299 transitions. [2024-01-31 16:11:55,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5783365570599613 [2024-01-31 16:11:55,138 INFO L175 Difference]: Start difference. First operand has 92 places, 53 transitions, 419 flow. Second operand 11 states and 299 transitions. [2024-01-31 16:11:55,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 102 transitions, 744 flow [2024-01-31 16:11:55,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 102 transitions, 662 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-01-31 16:11:55,145 INFO L231 Difference]: Finished difference. Result has 92 places, 53 transitions, 382 flow [2024-01-31 16:11:55,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=382, PETRI_PLACES=92, PETRI_TRANSITIONS=53} [2024-01-31 16:11:55,145 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 43 predicate places. [2024-01-31 16:11:55,146 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 53 transitions, 382 flow [2024-01-31 16:11:55,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:55,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:55,146 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] [2024-01-31 16:11:55,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-01-31 16:11:55,146 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:55,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:55,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1813318843, now seen corresponding path program 8 times [2024-01-31 16:11:55,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:55,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164252712] [2024-01-31 16:11:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:55,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:55,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:55,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164252712] [2024-01-31 16:11:55,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164252712] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:55,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:55,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:11:55,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892676616] [2024-01-31 16:11:55,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:55,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:11:55,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:55,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:11:55,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:11:55,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:55,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 53 transitions, 382 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:55,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:55,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:55,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:55,621 INFO L124 PetriNetUnfolderBase]: 348/681 cut-off events. [2024-01-31 16:11:55,622 INFO L125 PetriNetUnfolderBase]: For 1177/1177 co-relation queries the response was YES. [2024-01-31 16:11:55,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2189 conditions, 681 events. 348/681 cut-off events. For 1177/1177 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3084 event pairs, 42 based on Foata normal form. 1/629 useless extension candidates. Maximal degree in co-relation 2153. Up to 268 conditions per place. [2024-01-31 16:11:55,627 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 56 selfloop transitions, 19 changer transitions 14/92 dead transitions. [2024-01-31 16:11:55,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 92 transitions, 647 flow [2024-01-31 16:11:55,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:11:55,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:11:55,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 269 transitions. [2024-01-31 16:11:55,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5723404255319149 [2024-01-31 16:11:55,628 INFO L175 Difference]: Start difference. First operand has 92 places, 53 transitions, 382 flow. Second operand 10 states and 269 transitions. [2024-01-31 16:11:55,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 92 transitions, 647 flow [2024-01-31 16:11:55,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 92 transitions, 611 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-01-31 16:11:55,634 INFO L231 Difference]: Finished difference. Result has 93 places, 50 transitions, 349 flow [2024-01-31 16:11:55,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=349, PETRI_PLACES=93, PETRI_TRANSITIONS=50} [2024-01-31 16:11:55,634 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 44 predicate places. [2024-01-31 16:11:55,634 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 50 transitions, 349 flow [2024-01-31 16:11:55,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:55,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:55,635 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] [2024-01-31 16:11:55,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-01-31 16:11:55,635 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:55,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:55,635 INFO L85 PathProgramCache]: Analyzing trace with hash -849677613, now seen corresponding path program 9 times [2024-01-31 16:11:55,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:55,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352234293] [2024-01-31 16:11:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:55,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:55,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:55,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352234293] [2024-01-31 16:11:55,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352234293] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:55,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:55,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:11:55,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218844858] [2024-01-31 16:11:55,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:55,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:11:55,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:55,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:11:55,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:11:55,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:55,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 50 transitions, 349 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:55,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:55,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:55,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:56,103 INFO L124 PetriNetUnfolderBase]: 335/647 cut-off events. [2024-01-31 16:11:56,104 INFO L125 PetriNetUnfolderBase]: For 1087/1087 co-relation queries the response was YES. [2024-01-31 16:11:56,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2143 conditions, 647 events. 335/647 cut-off events. For 1087/1087 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2850 event pairs, 30 based on Foata normal form. 1/595 useless extension candidates. Maximal degree in co-relation 2113. Up to 342 conditions per place. [2024-01-31 16:11:56,108 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 49 selfloop transitions, 12 changer transitions 19/83 dead transitions. [2024-01-31 16:11:56,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 83 transitions, 581 flow [2024-01-31 16:11:56,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:11:56,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:11:56,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-01-31 16:11:56,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2024-01-31 16:11:56,110 INFO L175 Difference]: Start difference. First operand has 93 places, 50 transitions, 349 flow. Second operand 9 states and 243 transitions. [2024-01-31 16:11:56,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 83 transitions, 581 flow [2024-01-31 16:11:56,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 83 transitions, 546 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-01-31 16:11:56,116 INFO L231 Difference]: Finished difference. Result has 88 places, 46 transitions, 298 flow [2024-01-31 16:11:56,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=298, PETRI_PLACES=88, PETRI_TRANSITIONS=46} [2024-01-31 16:11:56,117 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 39 predicate places. [2024-01-31 16:11:56,117 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 46 transitions, 298 flow [2024-01-31 16:11:56,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:56,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:56,117 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] [2024-01-31 16:11:56,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-01-31 16:11:56,118 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:56,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:56,118 INFO L85 PathProgramCache]: Analyzing trace with hash -355443233, now seen corresponding path program 10 times [2024-01-31 16:11:56,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:56,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908761235] [2024-01-31 16:11:56,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:56,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:56,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:56,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908761235] [2024-01-31 16:11:56,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908761235] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:56,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:56,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:11:56,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440619733] [2024-01-31 16:11:56,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:56,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:11:56,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:56,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:11:56,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:11:56,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:56,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 46 transitions, 298 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:56,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:56,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:56,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:56,519 INFO L124 PetriNetUnfolderBase]: 312/595 cut-off events. [2024-01-31 16:11:56,519 INFO L125 PetriNetUnfolderBase]: For 812/812 co-relation queries the response was YES. [2024-01-31 16:11:56,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1958 conditions, 595 events. 312/595 cut-off events. For 812/812 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2570 event pairs, 111 based on Foata normal form. 1/545 useless extension candidates. Maximal degree in co-relation 1933. Up to 273 conditions per place. [2024-01-31 16:11:56,523 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 40 selfloop transitions, 7 changer transitions 33/83 dead transitions. [2024-01-31 16:11:56,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 83 transitions, 542 flow [2024-01-31 16:11:56,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 16:11:56,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 16:11:56,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-01-31 16:11:56,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.601063829787234 [2024-01-31 16:11:56,525 INFO L175 Difference]: Start difference. First operand has 88 places, 46 transitions, 298 flow. Second operand 8 states and 226 transitions. [2024-01-31 16:11:56,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 83 transitions, 542 flow [2024-01-31 16:11:56,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 83 transitions, 504 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-01-31 16:11:56,529 INFO L231 Difference]: Finished difference. Result has 80 places, 40 transitions, 224 flow [2024-01-31 16:11:56,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=224, PETRI_PLACES=80, PETRI_TRANSITIONS=40} [2024-01-31 16:11:56,530 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 31 predicate places. [2024-01-31 16:11:56,530 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 40 transitions, 224 flow [2024-01-31 16:11:56,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:56,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:56,530 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] [2024-01-31 16:11:56,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-01-31 16:11:56,531 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:56,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:56,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1192505613, now seen corresponding path program 1 times [2024-01-31 16:11:56,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:56,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434984615] [2024-01-31 16:11:56,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:56,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:56,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:56,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434984615] [2024-01-31 16:11:56,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434984615] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:56,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:56,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:11:56,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981931982] [2024-01-31 16:11:56,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:56,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:11:56,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:56,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:11:56,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:11:56,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:56,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 40 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:56,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:56,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:56,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:56,990 INFO L124 PetriNetUnfolderBase]: 253/494 cut-off events. [2024-01-31 16:11:56,990 INFO L125 PetriNetUnfolderBase]: For 384/384 co-relation queries the response was YES. [2024-01-31 16:11:56,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1596 conditions, 494 events. 253/494 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2040 event pairs, 44 based on Foata normal form. 1/477 useless extension candidates. Maximal degree in co-relation 1581. Up to 174 conditions per place. [2024-01-31 16:11:56,993 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 66 selfloop transitions, 20 changer transitions 8/97 dead transitions. [2024-01-31 16:11:56,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 97 transitions, 645 flow [2024-01-31 16:11:56,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:11:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:11:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 296 transitions. [2024-01-31 16:11:56,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725338491295938 [2024-01-31 16:11:56,995 INFO L175 Difference]: Start difference. First operand has 80 places, 40 transitions, 224 flow. Second operand 11 states and 296 transitions. [2024-01-31 16:11:56,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 97 transitions, 645 flow [2024-01-31 16:11:56,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 97 transitions, 576 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-01-31 16:11:56,998 INFO L231 Difference]: Finished difference. Result has 68 places, 49 transitions, 322 flow [2024-01-31 16:11:56,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=322, PETRI_PLACES=68, PETRI_TRANSITIONS=49} [2024-01-31 16:11:56,999 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 19 predicate places. [2024-01-31 16:11:56,999 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 49 transitions, 322 flow [2024-01-31 16:11:57,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:57,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:57,000 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] [2024-01-31 16:11:57,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-01-31 16:11:57,000 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:57,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:57,001 INFO L85 PathProgramCache]: Analyzing trace with hash -573068753, now seen corresponding path program 2 times [2024-01-31 16:11:57,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:57,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335215496] [2024-01-31 16:11:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:57,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:57,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:57,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335215496] [2024-01-31 16:11:57,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335215496] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:57,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:57,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:11:57,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711136880] [2024-01-31 16:11:57,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:57,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:11:57,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:57,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:11:57,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:11:57,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:57,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 49 transitions, 322 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:57,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:57,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:57,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:57,479 INFO L124 PetriNetUnfolderBase]: 297/598 cut-off events. [2024-01-31 16:11:57,479 INFO L125 PetriNetUnfolderBase]: For 371/371 co-relation queries the response was YES. [2024-01-31 16:11:57,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1978 conditions, 598 events. 297/598 cut-off events. For 371/371 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2678 event pairs, 48 based on Foata normal form. 1/581 useless extension candidates. Maximal degree in co-relation 1966. Up to 234 conditions per place. [2024-01-31 16:11:57,488 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 74 selfloop transitions, 23 changer transitions 8/108 dead transitions. [2024-01-31 16:11:57,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 108 transitions, 734 flow [2024-01-31 16:11:57,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:11:57,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:11:57,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 305 transitions. [2024-01-31 16:11:57,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5899419729206963 [2024-01-31 16:11:57,491 INFO L175 Difference]: Start difference. First operand has 68 places, 49 transitions, 322 flow. Second operand 11 states and 305 transitions. [2024-01-31 16:11:57,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 108 transitions, 734 flow [2024-01-31 16:11:57,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 108 transitions, 706 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-01-31 16:11:57,497 INFO L231 Difference]: Finished difference. Result has 80 places, 55 transitions, 445 flow [2024-01-31 16:11:57,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=445, PETRI_PLACES=80, PETRI_TRANSITIONS=55} [2024-01-31 16:11:57,498 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 31 predicate places. [2024-01-31 16:11:57,499 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 55 transitions, 445 flow [2024-01-31 16:11:57,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:57,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:57,499 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] [2024-01-31 16:11:57,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-01-31 16:11:57,499 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:57,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:57,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1244321653, now seen corresponding path program 3 times [2024-01-31 16:11:57,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:57,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172369994] [2024-01-31 16:11:57,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:57,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:57,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:57,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172369994] [2024-01-31 16:11:57,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172369994] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:57,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:57,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:11:57,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461800149] [2024-01-31 16:11:57,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:57,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:11:57,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:11:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:11:57,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:57,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 55 transitions, 445 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:57,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:57,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:57,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:57,987 INFO L124 PetriNetUnfolderBase]: 297/600 cut-off events. [2024-01-31 16:11:57,987 INFO L125 PetriNetUnfolderBase]: For 721/721 co-relation queries the response was YES. [2024-01-31 16:11:57,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2132 conditions, 600 events. 297/600 cut-off events. For 721/721 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2703 event pairs, 46 based on Foata normal form. 1/583 useless extension candidates. Maximal degree in co-relation 2115. Up to 246 conditions per place. [2024-01-31 16:11:57,994 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 57 selfloop transitions, 22 changer transitions 13/95 dead transitions. [2024-01-31 16:11:57,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 95 transitions, 728 flow [2024-01-31 16:11:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:11:57,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:11:57,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 268 transitions. [2024-01-31 16:11:57,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5702127659574469 [2024-01-31 16:11:57,996 INFO L175 Difference]: Start difference. First operand has 80 places, 55 transitions, 445 flow. Second operand 10 states and 268 transitions. [2024-01-31 16:11:57,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 95 transitions, 728 flow [2024-01-31 16:11:57,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 95 transitions, 702 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-01-31 16:11:58,003 INFO L231 Difference]: Finished difference. Result has 85 places, 54 transitions, 454 flow [2024-01-31 16:11:58,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=454, PETRI_PLACES=85, PETRI_TRANSITIONS=54} [2024-01-31 16:11:58,003 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 36 predicate places. [2024-01-31 16:11:58,003 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 54 transitions, 454 flow [2024-01-31 16:11:58,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:58,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:58,005 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] [2024-01-31 16:11:58,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-01-31 16:11:58,005 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:58,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:58,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1702833935, now seen corresponding path program 4 times [2024-01-31 16:11:58,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:58,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139892109] [2024-01-31 16:11:58,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:58,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:58,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:58,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139892109] [2024-01-31 16:11:58,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139892109] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:58,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:58,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:11:58,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686036674] [2024-01-31 16:11:58,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:58,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:11:58,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:58,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:11:58,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:11:58,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:58,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 54 transitions, 454 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:58,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:58,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:58,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:58,459 INFO L124 PetriNetUnfolderBase]: 279/561 cut-off events. [2024-01-31 16:11:58,459 INFO L125 PetriNetUnfolderBase]: For 758/758 co-relation queries the response was YES. [2024-01-31 16:11:58,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2038 conditions, 561 events. 279/561 cut-off events. For 758/758 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2467 event pairs, 52 based on Foata normal form. 1/544 useless extension candidates. Maximal degree in co-relation 2021. Up to 240 conditions per place. [2024-01-31 16:11:58,464 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 53 selfloop transitions, 20 changer transitions 16/92 dead transitions. [2024-01-31 16:11:58,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 92 transitions, 720 flow [2024-01-31 16:11:58,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:11:58,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:11:58,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 267 transitions. [2024-01-31 16:11:58,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680851063829787 [2024-01-31 16:11:58,465 INFO L175 Difference]: Start difference. First operand has 85 places, 54 transitions, 454 flow. Second operand 10 states and 267 transitions. [2024-01-31 16:11:58,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 92 transitions, 720 flow [2024-01-31 16:11:58,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 92 transitions, 657 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-01-31 16:11:58,469 INFO L231 Difference]: Finished difference. Result has 84 places, 51 transitions, 391 flow [2024-01-31 16:11:58,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=391, PETRI_PLACES=84, PETRI_TRANSITIONS=51} [2024-01-31 16:11:58,471 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 35 predicate places. [2024-01-31 16:11:58,471 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 51 transitions, 391 flow [2024-01-31 16:11:58,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:11:58,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:58,471 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] [2024-01-31 16:11:58,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-01-31 16:11:58,472 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:58,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:58,472 INFO L85 PathProgramCache]: Analyzing trace with hash -516639146, now seen corresponding path program 1 times [2024-01-31 16:11:58,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:58,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734898280] [2024-01-31 16:11:58,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:58,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:58,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:58,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734898280] [2024-01-31 16:11:58,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734898280] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:58,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:58,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:11:58,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725138084] [2024-01-31 16:11:58,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:58,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:11:58,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:58,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:11:58,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:11:58,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:58,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 51 transitions, 391 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:58,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:58,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:58,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:59,161 INFO L124 PetriNetUnfolderBase]: 461/942 cut-off events. [2024-01-31 16:11:59,161 INFO L125 PetriNetUnfolderBase]: For 1058/1058 co-relation queries the response was YES. [2024-01-31 16:11:59,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3126 conditions, 942 events. 461/942 cut-off events. For 1058/1058 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4915 event pairs, 24 based on Foata normal form. 1/905 useless extension candidates. Maximal degree in co-relation 3111. Up to 228 conditions per place. [2024-01-31 16:11:59,166 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 108 selfloop transitions, 38 changer transitions 10/159 dead transitions. [2024-01-31 16:11:59,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 159 transitions, 1124 flow [2024-01-31 16:11:59,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 16:11:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 16:11:59,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 484 transitions. [2024-01-31 16:11:59,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5721040189125296 [2024-01-31 16:11:59,169 INFO L175 Difference]: Start difference. First operand has 84 places, 51 transitions, 391 flow. Second operand 18 states and 484 transitions. [2024-01-31 16:11:59,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 159 transitions, 1124 flow [2024-01-31 16:11:59,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 159 transitions, 1061 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-01-31 16:11:59,174 INFO L231 Difference]: Finished difference. Result has 95 places, 67 transitions, 645 flow [2024-01-31 16:11:59,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=645, PETRI_PLACES=95, PETRI_TRANSITIONS=67} [2024-01-31 16:11:59,175 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 46 predicate places. [2024-01-31 16:11:59,175 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 67 transitions, 645 flow [2024-01-31 16:11:59,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:59,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:59,176 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] [2024-01-31 16:11:59,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-01-31 16:11:59,176 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:59,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:59,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1819646072, now seen corresponding path program 2 times [2024-01-31 16:11:59,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:59,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712608578] [2024-01-31 16:11:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:59,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:59,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:59,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712608578] [2024-01-31 16:11:59,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712608578] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:59,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:59,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:11:59,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143778987] [2024-01-31 16:11:59,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:59,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:11:59,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:59,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:11:59,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:11:59,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:59,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 67 transitions, 645 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:59,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:59,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:59,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:59,704 INFO L124 PetriNetUnfolderBase]: 510/1046 cut-off events. [2024-01-31 16:11:59,704 INFO L125 PetriNetUnfolderBase]: For 1599/1599 co-relation queries the response was YES. [2024-01-31 16:11:59,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3727 conditions, 1046 events. 510/1046 cut-off events. For 1599/1599 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5651 event pairs, 84 based on Foata normal form. 1/1001 useless extension candidates. Maximal degree in co-relation 3707. Up to 466 conditions per place. [2024-01-31 16:11:59,711 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 78 selfloop transitions, 38 changer transitions 12/131 dead transitions. [2024-01-31 16:11:59,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 131 transitions, 1127 flow [2024-01-31 16:11:59,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:11:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:11:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 346 transitions. [2024-01-31 16:11:59,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5662847790507365 [2024-01-31 16:11:59,713 INFO L175 Difference]: Start difference. First operand has 95 places, 67 transitions, 645 flow. Second operand 13 states and 346 transitions. [2024-01-31 16:11:59,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 131 transitions, 1127 flow [2024-01-31 16:11:59,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 131 transitions, 1104 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-01-31 16:11:59,721 INFO L231 Difference]: Finished difference. Result has 108 places, 73 transitions, 809 flow [2024-01-31 16:11:59,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=809, PETRI_PLACES=108, PETRI_TRANSITIONS=73} [2024-01-31 16:11:59,722 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 59 predicate places. [2024-01-31 16:11:59,722 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 73 transitions, 809 flow [2024-01-31 16:11:59,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:59,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:59,722 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] [2024-01-31 16:11:59,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-01-31 16:11:59,723 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:11:59,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:59,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1214089520, now seen corresponding path program 3 times [2024-01-31 16:11:59,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:59,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153639581] [2024-01-31 16:11:59,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:59,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:59,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:59,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153639581] [2024-01-31 16:11:59,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153639581] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:11:59,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:11:59,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:11:59,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530297167] [2024-01-31 16:11:59,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:11:59,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:11:59,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:59,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:11:59,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:11:59,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:11:59,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 73 transitions, 809 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:11:59,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:59,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:11:59,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:00,275 INFO L124 PetriNetUnfolderBase]: 510/1048 cut-off events. [2024-01-31 16:12:00,276 INFO L125 PetriNetUnfolderBase]: For 2274/2274 co-relation queries the response was YES. [2024-01-31 16:12:00,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3987 conditions, 1048 events. 510/1048 cut-off events. For 2274/2274 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5695 event pairs, 54 based on Foata normal form. 1/1005 useless extension candidates. Maximal degree in co-relation 3963. Up to 320 conditions per place. [2024-01-31 16:12:00,282 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 84 selfloop transitions, 33 changer transitions 19/139 dead transitions. [2024-01-31 16:12:00,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 139 transitions, 1262 flow [2024-01-31 16:12:00,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:12:00,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:12:00,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 339 transitions. [2024-01-31 16:12:00,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.601063829787234 [2024-01-31 16:12:00,284 INFO L175 Difference]: Start difference. First operand has 108 places, 73 transitions, 809 flow. Second operand 12 states and 339 transitions. [2024-01-31 16:12:00,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 139 transitions, 1262 flow [2024-01-31 16:12:00,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 139 transitions, 1197 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-01-31 16:12:00,295 INFO L231 Difference]: Finished difference. Result has 115 places, 73 transitions, 821 flow [2024-01-31 16:12:00,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=821, PETRI_PLACES=115, PETRI_TRANSITIONS=73} [2024-01-31 16:12:00,295 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 66 predicate places. [2024-01-31 16:12:00,296 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 73 transitions, 821 flow [2024-01-31 16:12:00,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:00,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:00,296 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] [2024-01-31 16:12:00,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-01-31 16:12:00,296 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:00,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:00,297 INFO L85 PathProgramCache]: Analyzing trace with hash -805657099, now seen corresponding path program 5 times [2024-01-31 16:12:00,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:00,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810989618] [2024-01-31 16:12:00,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:00,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:00,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:00,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810989618] [2024-01-31 16:12:00,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810989618] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:00,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:00,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:12:00,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127517999] [2024-01-31 16:12:00,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:00,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:12:00,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:00,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:12:00,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:12:00,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:12:00,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 73 transitions, 821 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:12:00,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:00,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:12:00,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:00,775 INFO L124 PetriNetUnfolderBase]: 466/957 cut-off events. [2024-01-31 16:12:00,775 INFO L125 PetriNetUnfolderBase]: For 2341/2341 co-relation queries the response was YES. [2024-01-31 16:12:00,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3763 conditions, 957 events. 466/957 cut-off events. For 2341/2341 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5074 event pairs, 96 based on Foata normal form. 2/923 useless extension candidates. Maximal degree in co-relation 3737. Up to 460 conditions per place. [2024-01-31 16:12:00,781 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 70 selfloop transitions, 26 changer transitions 17/116 dead transitions. [2024-01-31 16:12:00,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 116 transitions, 1152 flow [2024-01-31 16:12:00,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:12:00,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:12:00,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 272 transitions. [2024-01-31 16:12:00,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5787234042553191 [2024-01-31 16:12:00,787 INFO L175 Difference]: Start difference. First operand has 115 places, 73 transitions, 821 flow. Second operand 10 states and 272 transitions. [2024-01-31 16:12:00,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 116 transitions, 1152 flow [2024-01-31 16:12:00,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 116 transitions, 1105 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-01-31 16:12:00,797 INFO L231 Difference]: Finished difference. Result has 116 places, 69 transitions, 762 flow [2024-01-31 16:12:00,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=762, PETRI_PLACES=116, PETRI_TRANSITIONS=69} [2024-01-31 16:12:00,801 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 67 predicate places. [2024-01-31 16:12:00,801 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 69 transitions, 762 flow [2024-01-31 16:12:00,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:12:00,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:00,801 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] [2024-01-31 16:12:00,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-01-31 16:12:00,802 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:00,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:00,802 INFO L85 PathProgramCache]: Analyzing trace with hash 372730514, now seen corresponding path program 4 times [2024-01-31 16:12:00,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:00,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985632856] [2024-01-31 16:12:00,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:00,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:00,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:00,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985632856] [2024-01-31 16:12:00,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985632856] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:00,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:00,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:12:00,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192761221] [2024-01-31 16:12:00,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:00,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:00,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:00,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:00,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:12:01,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:12:01,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 69 transitions, 762 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:01,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:01,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:12:01,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:01,375 INFO L124 PetriNetUnfolderBase]: 416/862 cut-off events. [2024-01-31 16:12:01,375 INFO L125 PetriNetUnfolderBase]: For 2245/2245 co-relation queries the response was YES. [2024-01-31 16:12:01,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3356 conditions, 862 events. 416/862 cut-off events. For 2245/2245 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4439 event pairs, 46 based on Foata normal form. 1/827 useless extension candidates. Maximal degree in co-relation 3331. Up to 262 conditions per place. [2024-01-31 16:12:01,380 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 90 selfloop transitions, 30 changer transitions 11/134 dead transitions. [2024-01-31 16:12:01,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 134 transitions, 1193 flow [2024-01-31 16:12:01,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:12:01,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:12:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 360 transitions. [2024-01-31 16:12:01,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891980360065466 [2024-01-31 16:12:01,384 INFO L175 Difference]: Start difference. First operand has 116 places, 69 transitions, 762 flow. Second operand 13 states and 360 transitions. [2024-01-31 16:12:01,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 134 transitions, 1193 flow [2024-01-31 16:12:01,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 134 transitions, 1140 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-01-31 16:12:01,393 INFO L231 Difference]: Finished difference. Result has 120 places, 70 transitions, 785 flow [2024-01-31 16:12:01,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=785, PETRI_PLACES=120, PETRI_TRANSITIONS=70} [2024-01-31 16:12:01,395 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 71 predicate places. [2024-01-31 16:12:01,396 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 70 transitions, 785 flow [2024-01-31 16:12:01,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:01,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:01,396 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] [2024-01-31 16:12:01,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-01-31 16:12:01,397 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:01,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:01,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1859542671, now seen corresponding path program 6 times [2024-01-31 16:12:01,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:01,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586657409] [2024-01-31 16:12:01,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:01,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:01,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:01,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586657409] [2024-01-31 16:12:01,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586657409] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:01,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:01,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:12:01,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435550653] [2024-01-31 16:12:01,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:01,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:12:01,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:01,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:12:01,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:12:01,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:12:01,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 70 transitions, 785 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:12:01,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:01,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:12:01,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:01,837 INFO L124 PetriNetUnfolderBase]: 402/825 cut-off events. [2024-01-31 16:12:01,838 INFO L125 PetriNetUnfolderBase]: For 2257/2257 co-relation queries the response was YES. [2024-01-31 16:12:01,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3309 conditions, 825 events. 402/825 cut-off events. For 2257/2257 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4183 event pairs, 96 based on Foata normal form. 2/791 useless extension candidates. Maximal degree in co-relation 3283. Up to 446 conditions per place. [2024-01-31 16:12:01,843 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 55 selfloop transitions, 19 changer transitions 24/101 dead transitions. [2024-01-31 16:12:01,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 101 transitions, 1051 flow [2024-01-31 16:12:01,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:12:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:12:01,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-01-31 16:12:01,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2024-01-31 16:12:01,845 INFO L175 Difference]: Start difference. First operand has 120 places, 70 transitions, 785 flow. Second operand 9 states and 240 transitions. [2024-01-31 16:12:01,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 101 transitions, 1051 flow [2024-01-31 16:12:01,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 101 transitions, 992 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-01-31 16:12:01,853 INFO L231 Difference]: Finished difference. Result has 119 places, 62 transitions, 635 flow [2024-01-31 16:12:01,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=635, PETRI_PLACES=119, PETRI_TRANSITIONS=62} [2024-01-31 16:12:01,854 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 70 predicate places. [2024-01-31 16:12:01,854 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 62 transitions, 635 flow [2024-01-31 16:12:01,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:12:01,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:01,855 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] [2024-01-31 16:12:01,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-01-31 16:12:01,855 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:01,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:01,856 INFO L85 PathProgramCache]: Analyzing trace with hash -324416556, now seen corresponding path program 5 times [2024-01-31 16:12:01,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:01,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997261337] [2024-01-31 16:12:01,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:01,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:02,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:02,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997261337] [2024-01-31 16:12:02,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997261337] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:02,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:02,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:12:02,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302497746] [2024-01-31 16:12:02,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:02,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:02,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:02,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:02,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:12:02,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:12:02,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 62 transitions, 635 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:02,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:02,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:12:02,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:02,405 INFO L124 PetriNetUnfolderBase]: 358/725 cut-off events. [2024-01-31 16:12:02,406 INFO L125 PetriNetUnfolderBase]: For 1749/1749 co-relation queries the response was YES. [2024-01-31 16:12:02,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2832 conditions, 725 events. 358/725 cut-off events. For 1749/1749 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3471 event pairs, 26 based on Foata normal form. 1/690 useless extension candidates. Maximal degree in co-relation 2807. Up to 228 conditions per place. [2024-01-31 16:12:02,410 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 71 selfloop transitions, 23 changer transitions 20/117 dead transitions. [2024-01-31 16:12:02,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 117 transitions, 988 flow [2024-01-31 16:12:02,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:12:02,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:12:02,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 330 transitions. [2024-01-31 16:12:02,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851063829787234 [2024-01-31 16:12:02,413 INFO L175 Difference]: Start difference. First operand has 119 places, 62 transitions, 635 flow. Second operand 12 states and 330 transitions. [2024-01-31 16:12:02,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 117 transitions, 988 flow [2024-01-31 16:12:02,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 117 transitions, 918 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-01-31 16:12:02,421 INFO L231 Difference]: Finished difference. Result has 110 places, 58 transitions, 562 flow [2024-01-31 16:12:02,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=562, PETRI_PLACES=110, PETRI_TRANSITIONS=58} [2024-01-31 16:12:02,421 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 61 predicate places. [2024-01-31 16:12:02,421 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 58 transitions, 562 flow [2024-01-31 16:12:02,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:02,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:02,422 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] [2024-01-31 16:12:02,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-01-31 16:12:02,422 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:02,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:02,423 INFO L85 PathProgramCache]: Analyzing trace with hash 798207888, now seen corresponding path program 6 times [2024-01-31 16:12:02,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:02,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122875955] [2024-01-31 16:12:02,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:02,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:02,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:02,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122875955] [2024-01-31 16:12:02,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122875955] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:02,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:02,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:12:02,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124648862] [2024-01-31 16:12:02,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:02,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:02,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:02,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:02,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:12:02,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:12:02,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 58 transitions, 562 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:02,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:02,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:12:02,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:02,938 INFO L124 PetriNetUnfolderBase]: 335/673 cut-off events. [2024-01-31 16:12:02,938 INFO L125 PetriNetUnfolderBase]: For 1171/1171 co-relation queries the response was YES. [2024-01-31 16:12:02,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2627 conditions, 673 events. 335/673 cut-off events. For 1171/1171 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3129 event pairs, 20 based on Foata normal form. 1/640 useless extension candidates. Maximal degree in co-relation 2605. Up to 228 conditions per place. [2024-01-31 16:12:02,942 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 67 selfloop transitions, 25 changer transitions 17/112 dead transitions. [2024-01-31 16:12:02,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 112 transitions, 901 flow [2024-01-31 16:12:02,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:12:02,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:12:02,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 325 transitions. [2024-01-31 16:12:02,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762411347517731 [2024-01-31 16:12:02,944 INFO L175 Difference]: Start difference. First operand has 110 places, 58 transitions, 562 flow. Second operand 12 states and 325 transitions. [2024-01-31 16:12:02,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 112 transitions, 901 flow [2024-01-31 16:12:02,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 112 transitions, 827 flow, removed 5 selfloop flow, removed 14 redundant places. [2024-01-31 16:12:02,950 INFO L231 Difference]: Finished difference. Result has 102 places, 55 transitions, 505 flow [2024-01-31 16:12:02,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=505, PETRI_PLACES=102, PETRI_TRANSITIONS=55} [2024-01-31 16:12:02,951 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 53 predicate places. [2024-01-31 16:12:02,951 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 55 transitions, 505 flow [2024-01-31 16:12:02,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:02,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:02,952 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] [2024-01-31 16:12:02,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-01-31 16:12:02,952 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:02,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:02,953 INFO L85 PathProgramCache]: Analyzing trace with hash -977259950, now seen corresponding path program 7 times [2024-01-31 16:12:02,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:02,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750856097] [2024-01-31 16:12:02,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:02,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:03,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:03,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:03,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750856097] [2024-01-31 16:12:03,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750856097] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:03,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:03,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:12:03,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298784727] [2024-01-31 16:12:03,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:03,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:03,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:03,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:03,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:12:03,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:12:03,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 55 transitions, 505 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:03,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:03,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:12:03,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:03,450 INFO L124 PetriNetUnfolderBase]: 307/614 cut-off events. [2024-01-31 16:12:03,451 INFO L125 PetriNetUnfolderBase]: For 965/965 co-relation queries the response was YES. [2024-01-31 16:12:03,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2344 conditions, 614 events. 307/614 cut-off events. For 965/965 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2768 event pairs, 20 based on Foata normal form. 1/581 useless extension candidates. Maximal degree in co-relation 2325. Up to 228 conditions per place. [2024-01-31 16:12:03,453 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 59 selfloop transitions, 20 changer transitions 24/106 dead transitions. [2024-01-31 16:12:03,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 106 transitions, 826 flow [2024-01-31 16:12:03,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:12:03,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:12:03,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 321 transitions. [2024-01-31 16:12:03,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2024-01-31 16:12:03,455 INFO L175 Difference]: Start difference. First operand has 102 places, 55 transitions, 505 flow. Second operand 12 states and 321 transitions. [2024-01-31 16:12:03,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 106 transitions, 826 flow [2024-01-31 16:12:03,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 106 transitions, 768 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-01-31 16:12:03,459 INFO L231 Difference]: Finished difference. Result has 100 places, 50 transitions, 436 flow [2024-01-31 16:12:03,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=436, PETRI_PLACES=100, PETRI_TRANSITIONS=50} [2024-01-31 16:12:03,460 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 51 predicate places. [2024-01-31 16:12:03,460 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 50 transitions, 436 flow [2024-01-31 16:12:03,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:03,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:03,461 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] [2024-01-31 16:12:03,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-01-31 16:12:03,461 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:03,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:03,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1185659092, now seen corresponding path program 8 times [2024-01-31 16:12:03,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:03,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111582450] [2024-01-31 16:12:03,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:03,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:03,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:03,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111582450] [2024-01-31 16:12:03,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111582450] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:03,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:03,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:12:03,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525098576] [2024-01-31 16:12:03,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:03,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:03,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:03,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:03,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:12:03,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:12:03,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 50 transitions, 436 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:03,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:03,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:12:03,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:03,930 INFO L124 PetriNetUnfolderBase]: 293/592 cut-off events. [2024-01-31 16:12:03,930 INFO L125 PetriNetUnfolderBase]: For 794/794 co-relation queries the response was YES. [2024-01-31 16:12:03,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2230 conditions, 592 events. 293/592 cut-off events. For 794/794 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2665 event pairs, 26 based on Foata normal form. 1/559 useless extension candidates. Maximal degree in co-relation 2213. Up to 238 conditions per place. [2024-01-31 16:12:03,934 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 50 selfloop transitions, 18 changer transitions 26/97 dead transitions. [2024-01-31 16:12:03,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 97 transitions, 746 flow [2024-01-31 16:12:03,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:12:03,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:12:03,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 291 transitions. [2024-01-31 16:12:03,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562862669245648 [2024-01-31 16:12:03,935 INFO L175 Difference]: Start difference. First operand has 100 places, 50 transitions, 436 flow. Second operand 11 states and 291 transitions. [2024-01-31 16:12:03,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 97 transitions, 746 flow [2024-01-31 16:12:03,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 97 transitions, 661 flow, removed 3 selfloop flow, removed 16 redundant places. [2024-01-31 16:12:03,939 INFO L231 Difference]: Finished difference. Result has 88 places, 48 transitions, 373 flow [2024-01-31 16:12:03,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=373, PETRI_PLACES=88, PETRI_TRANSITIONS=48} [2024-01-31 16:12:03,940 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 39 predicate places. [2024-01-31 16:12:03,940 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 48 transitions, 373 flow [2024-01-31 16:12:03,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:03,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:03,940 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] [2024-01-31 16:12:03,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-01-31 16:12:03,941 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:03,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:03,941 INFO L85 PathProgramCache]: Analyzing trace with hash 546706644, now seen corresponding path program 9 times [2024-01-31 16:12:03,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:03,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374315993] [2024-01-31 16:12:03,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:03,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:04,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:04,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374315993] [2024-01-31 16:12:04,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374315993] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:04,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:04,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:12:04,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87642883] [2024-01-31 16:12:04,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:04,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:04,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:04,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:04,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:12:04,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:12:04,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 48 transitions, 373 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:04,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:04,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:12:04,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:04,383 INFO L124 PetriNetUnfolderBase]: 257/522 cut-off events. [2024-01-31 16:12:04,384 INFO L125 PetriNetUnfolderBase]: For 485/485 co-relation queries the response was YES. [2024-01-31 16:12:04,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1906 conditions, 522 events. 257/522 cut-off events. For 485/485 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2252 event pairs, 26 based on Foata normal form. 1/495 useless extension candidates. Maximal degree in co-relation 1891. Up to 152 conditions per place. [2024-01-31 16:12:04,386 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 57 selfloop transitions, 17 changer transitions 20/97 dead transitions. [2024-01-31 16:12:04,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 97 transitions, 681 flow [2024-01-31 16:12:04,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:12:04,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:12:04,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 296 transitions. [2024-01-31 16:12:04,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725338491295938 [2024-01-31 16:12:04,388 INFO L175 Difference]: Start difference. First operand has 88 places, 48 transitions, 373 flow. Second operand 11 states and 296 transitions. [2024-01-31 16:12:04,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 97 transitions, 681 flow [2024-01-31 16:12:04,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 97 transitions, 637 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-01-31 16:12:04,391 INFO L231 Difference]: Finished difference. Result has 86 places, 46 transitions, 343 flow [2024-01-31 16:12:04,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=343, PETRI_PLACES=86, PETRI_TRANSITIONS=46} [2024-01-31 16:12:04,392 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 37 predicate places. [2024-01-31 16:12:04,392 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 46 transitions, 343 flow [2024-01-31 16:12:04,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:04,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:04,392 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] [2024-01-31 16:12:04,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-01-31 16:12:04,393 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:04,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:04,393 INFO L85 PathProgramCache]: Analyzing trace with hash -596433288, now seen corresponding path program 10 times [2024-01-31 16:12:04,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:04,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675642735] [2024-01-31 16:12:04,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:04,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:04,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:04,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675642735] [2024-01-31 16:12:04,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675642735] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:04,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:04,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:12:04,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741700571] [2024-01-31 16:12:04,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:04,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:04,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:04,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:04,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:12:04,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:12:04,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 46 transitions, 343 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:04,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:04,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:12:04,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:04,832 INFO L124 PetriNetUnfolderBase]: 213/433 cut-off events. [2024-01-31 16:12:04,832 INFO L125 PetriNetUnfolderBase]: For 358/358 co-relation queries the response was YES. [2024-01-31 16:12:04,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1573 conditions, 433 events. 213/433 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1752 event pairs, 20 based on Foata normal form. 1/412 useless extension candidates. Maximal degree in co-relation 1560. Up to 152 conditions per place. [2024-01-31 16:12:04,834 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 41 selfloop transitions, 14 changer transitions 27/85 dead transitions. [2024-01-31 16:12:04,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 85 transitions, 596 flow [2024-01-31 16:12:04,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:12:04,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:12:04,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 285 transitions. [2024-01-31 16:12:04,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512572533849129 [2024-01-31 16:12:04,836 INFO L175 Difference]: Start difference. First operand has 86 places, 46 transitions, 343 flow. Second operand 11 states and 285 transitions. [2024-01-31 16:12:04,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 85 transitions, 596 flow [2024-01-31 16:12:04,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 85 transitions, 563 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-01-31 16:12:04,838 INFO L231 Difference]: Finished difference. Result has 85 places, 41 transitions, 293 flow [2024-01-31 16:12:04,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=293, PETRI_PLACES=85, PETRI_TRANSITIONS=41} [2024-01-31 16:12:04,839 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 36 predicate places. [2024-01-31 16:12:04,839 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 41 transitions, 293 flow [2024-01-31 16:12:04,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:04,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:04,840 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] [2024-01-31 16:12:04,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-01-31 16:12:04,840 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:04,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:04,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1968457481, now seen corresponding path program 7 times [2024-01-31 16:12:04,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:04,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918890483] [2024-01-31 16:12:04,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:04,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:04,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:04,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918890483] [2024-01-31 16:12:04,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918890483] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:04,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:04,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:12:04,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441908243] [2024-01-31 16:12:04,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:04,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:12:04,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:04,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:12:04,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-01-31 16:12:04,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:12:04,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 41 transitions, 293 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:12:04,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:04,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:12:04,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:05,194 INFO L124 PetriNetUnfolderBase]: 188/376 cut-off events. [2024-01-31 16:12:05,195 INFO L125 PetriNetUnfolderBase]: For 272/272 co-relation queries the response was YES. [2024-01-31 16:12:05,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1383 conditions, 376 events. 188/376 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1400 event pairs, 63 based on Foata normal form. 1/358 useless extension candidates. Maximal degree in co-relation 1372. Up to 141 conditions per place. [2024-01-31 16:12:05,197 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 51 selfloop transitions, 15 changer transitions 9/78 dead transitions. [2024-01-31 16:12:05,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 78 transitions, 547 flow [2024-01-31 16:12:05,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:12:05,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:12:05,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 282 transitions. [2024-01-31 16:12:05,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-01-31 16:12:05,198 INFO L175 Difference]: Start difference. First operand has 85 places, 41 transitions, 293 flow. Second operand 11 states and 282 transitions. [2024-01-31 16:12:05,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 78 transitions, 547 flow [2024-01-31 16:12:05,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 508 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-01-31 16:12:05,201 INFO L231 Difference]: Finished difference. Result has 80 places, 44 transitions, 317 flow [2024-01-31 16:12:05,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=317, PETRI_PLACES=80, PETRI_TRANSITIONS=44} [2024-01-31 16:12:05,201 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 31 predicate places. [2024-01-31 16:12:05,201 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 44 transitions, 317 flow [2024-01-31 16:12:05,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 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) [2024-01-31 16:12:05,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:05,202 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] [2024-01-31 16:12:05,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-01-31 16:12:05,202 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:05,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:05,203 INFO L85 PathProgramCache]: Analyzing trace with hash 571688462, now seen corresponding path program 11 times [2024-01-31 16:12:05,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:05,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860732549] [2024-01-31 16:12:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:05,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:05,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:05,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860732549] [2024-01-31 16:12:05,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860732549] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:05,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:05,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:12:05,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235083422] [2024-01-31 16:12:05,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:05,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:05,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:05,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:05,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:12:05,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:12:05,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 44 transitions, 317 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:05,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:05,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:12:05,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:05,671 INFO L124 PetriNetUnfolderBase]: 249/522 cut-off events. [2024-01-31 16:12:05,671 INFO L125 PetriNetUnfolderBase]: For 378/378 co-relation queries the response was YES. [2024-01-31 16:12:05,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1935 conditions, 522 events. 249/522 cut-off events. For 378/378 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2295 event pairs, 24 based on Foata normal form. 1/500 useless extension candidates. Maximal degree in co-relation 1921. Up to 192 conditions per place. [2024-01-31 16:12:05,674 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 67 selfloop transitions, 23 changer transitions 10/103 dead transitions. [2024-01-31 16:12:05,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 103 transitions, 766 flow [2024-01-31 16:12:05,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:12:05,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:12:05,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 337 transitions. [2024-01-31 16:12:05,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5515548281505729 [2024-01-31 16:12:05,676 INFO L175 Difference]: Start difference. First operand has 80 places, 44 transitions, 317 flow. Second operand 13 states and 337 transitions. [2024-01-31 16:12:05,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 103 transitions, 766 flow [2024-01-31 16:12:05,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 103 transitions, 723 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-01-31 16:12:05,679 INFO L231 Difference]: Finished difference. Result has 91 places, 52 transitions, 465 flow [2024-01-31 16:12:05,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=465, PETRI_PLACES=91, PETRI_TRANSITIONS=52} [2024-01-31 16:12:05,680 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 42 predicate places. [2024-01-31 16:12:05,680 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 52 transitions, 465 flow [2024-01-31 16:12:05,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:05,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:05,681 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] [2024-01-31 16:12:05,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-01-31 16:12:05,681 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:05,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:05,682 INFO L85 PathProgramCache]: Analyzing trace with hash 2059473862, now seen corresponding path program 12 times [2024-01-31 16:12:05,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:05,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474200408] [2024-01-31 16:12:05,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:05,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:05,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:05,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:05,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474200408] [2024-01-31 16:12:05,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474200408] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:05,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:05,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:12:05,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95672129] [2024-01-31 16:12:05,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:05,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:05,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:05,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:05,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:12:05,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:12:05,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 52 transitions, 465 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:05,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:05,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:12:05,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:06,129 INFO L124 PetriNetUnfolderBase]: 243/512 cut-off events. [2024-01-31 16:12:06,129 INFO L125 PetriNetUnfolderBase]: For 586/586 co-relation queries the response was YES. [2024-01-31 16:12:06,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2009 conditions, 512 events. 243/512 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2259 event pairs, 48 based on Foata normal form. 1/492 useless extension candidates. Maximal degree in co-relation 1991. Up to 154 conditions per place. [2024-01-31 16:12:06,132 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 54 selfloop transitions, 27 changer transitions 9/93 dead transitions. [2024-01-31 16:12:06,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 93 transitions, 758 flow [2024-01-31 16:12:06,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:12:06,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:12:06,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 325 transitions. [2024-01-31 16:12:06,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-01-31 16:12:06,135 INFO L175 Difference]: Start difference. First operand has 91 places, 52 transitions, 465 flow. Second operand 13 states and 325 transitions. [2024-01-31 16:12:06,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 93 transitions, 758 flow [2024-01-31 16:12:06,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 93 transitions, 716 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-01-31 16:12:06,139 INFO L231 Difference]: Finished difference. Result has 99 places, 54 transitions, 520 flow [2024-01-31 16:12:06,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=520, PETRI_PLACES=99, PETRI_TRANSITIONS=54} [2024-01-31 16:12:06,140 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 50 predicate places. [2024-01-31 16:12:06,140 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 54 transitions, 520 flow [2024-01-31 16:12:06,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:06,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:06,140 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] [2024-01-31 16:12:06,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-01-31 16:12:06,141 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:06,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:06,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1808946320, now seen corresponding path program 13 times [2024-01-31 16:12:06,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:06,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934116170] [2024-01-31 16:12:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:06,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:06,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:06,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934116170] [2024-01-31 16:12:06,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934116170] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:06,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:06,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:12:06,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225738741] [2024-01-31 16:12:06,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:06,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:06,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:06,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:06,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:12:06,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:12:06,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 54 transitions, 520 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:06,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:06,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:12:06,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:06,606 INFO L124 PetriNetUnfolderBase]: 247/531 cut-off events. [2024-01-31 16:12:06,606 INFO L125 PetriNetUnfolderBase]: For 771/771 co-relation queries the response was YES. [2024-01-31 16:12:06,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2119 conditions, 531 events. 247/531 cut-off events. For 771/771 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2384 event pairs, 12 based on Foata normal form. 1/513 useless extension candidates. Maximal degree in co-relation 2100. Up to 184 conditions per place. [2024-01-31 16:12:06,609 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 56 selfloop transitions, 27 changer transitions 11/97 dead transitions. [2024-01-31 16:12:06,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 97 transitions, 823 flow [2024-01-31 16:12:06,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 16:12:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 16:12:06,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 327 transitions. [2024-01-31 16:12:06,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351882160392799 [2024-01-31 16:12:06,611 INFO L175 Difference]: Start difference. First operand has 99 places, 54 transitions, 520 flow. Second operand 13 states and 327 transitions. [2024-01-31 16:12:06,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 97 transitions, 823 flow [2024-01-31 16:12:06,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 97 transitions, 760 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-01-31 16:12:06,616 INFO L231 Difference]: Finished difference. Result has 105 places, 55 transitions, 533 flow [2024-01-31 16:12:06,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=533, PETRI_PLACES=105, PETRI_TRANSITIONS=55} [2024-01-31 16:12:06,618 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 56 predicate places. [2024-01-31 16:12:06,618 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 55 transitions, 533 flow [2024-01-31 16:12:06,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:06,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:06,619 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] [2024-01-31 16:12:06,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-01-31 16:12:06,619 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:06,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:06,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1693192468, now seen corresponding path program 14 times [2024-01-31 16:12:06,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:06,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609200917] [2024-01-31 16:12:06,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:06,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:06,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:06,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609200917] [2024-01-31 16:12:06,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609200917] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:06,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:06,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:12:06,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918794284] [2024-01-31 16:12:06,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:06,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:06,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:06,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:06,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:12:06,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:12:06,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 55 transitions, 533 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:06,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:06,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:12:06,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:07,076 INFO L124 PetriNetUnfolderBase]: 233/496 cut-off events. [2024-01-31 16:12:07,076 INFO L125 PetriNetUnfolderBase]: For 779/779 co-relation queries the response was YES. [2024-01-31 16:12:07,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2046 conditions, 496 events. 233/496 cut-off events. For 779/779 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2170 event pairs, 22 based on Foata normal form. 1/480 useless extension candidates. Maximal degree in co-relation 2026. Up to 178 conditions per place. [2024-01-31 16:12:07,079 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 53 selfloop transitions, 21 changer transitions 15/92 dead transitions. [2024-01-31 16:12:07,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 92 transitions, 792 flow [2024-01-31 16:12:07,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:12:07,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:12:07,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 304 transitions. [2024-01-31 16:12:07,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390070921985816 [2024-01-31 16:12:07,081 INFO L175 Difference]: Start difference. First operand has 105 places, 55 transitions, 533 flow. Second operand 12 states and 304 transitions. [2024-01-31 16:12:07,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 92 transitions, 792 flow [2024-01-31 16:12:07,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 92 transitions, 735 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-01-31 16:12:07,086 INFO L231 Difference]: Finished difference. Result has 106 places, 52 transitions, 486 flow [2024-01-31 16:12:07,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=486, PETRI_PLACES=106, PETRI_TRANSITIONS=52} [2024-01-31 16:12:07,086 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 57 predicate places. [2024-01-31 16:12:07,087 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 52 transitions, 486 flow [2024-01-31 16:12:07,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:07,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:07,087 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] [2024-01-31 16:12:07,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-01-31 16:12:07,087 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:07,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:07,088 INFO L85 PathProgramCache]: Analyzing trace with hash 691442320, now seen corresponding path program 15 times [2024-01-31 16:12:07,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:07,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839226591] [2024-01-31 16:12:07,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:07,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:07,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:07,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839226591] [2024-01-31 16:12:07,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839226591] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:07,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:07,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:12:07,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028711250] [2024-01-31 16:12:07,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:07,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:07,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:07,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:07,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:12:07,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:12:07,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 52 transitions, 486 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:07,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:07,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:12:07,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:07,512 INFO L124 PetriNetUnfolderBase]: 205/437 cut-off events. [2024-01-31 16:12:07,512 INFO L125 PetriNetUnfolderBase]: For 721/721 co-relation queries the response was YES. [2024-01-31 16:12:07,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1799 conditions, 437 events. 205/437 cut-off events. For 721/721 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1818 event pairs, 22 based on Foata normal form. 1/421 useless extension candidates. Maximal degree in co-relation 1780. Up to 178 conditions per place. [2024-01-31 16:12:07,515 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 47 selfloop transitions, 17 changer transitions 19/86 dead transitions. [2024-01-31 16:12:07,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 86 transitions, 727 flow [2024-01-31 16:12:07,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:12:07,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:12:07,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 300 transitions. [2024-01-31 16:12:07,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-01-31 16:12:07,517 INFO L175 Difference]: Start difference. First operand has 106 places, 52 transitions, 486 flow. Second operand 12 states and 300 transitions. [2024-01-31 16:12:07,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 86 transitions, 727 flow [2024-01-31 16:12:07,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 86 transitions, 669 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-01-31 16:12:07,521 INFO L231 Difference]: Finished difference. Result has 104 places, 48 transitions, 418 flow [2024-01-31 16:12:07,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=418, PETRI_PLACES=104, PETRI_TRANSITIONS=48} [2024-01-31 16:12:07,521 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 55 predicate places. [2024-01-31 16:12:07,522 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 48 transitions, 418 flow [2024-01-31 16:12:07,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:07,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:07,522 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] [2024-01-31 16:12:07,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-01-31 16:12:07,523 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:07,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:07,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1884895990, now seen corresponding path program 16 times [2024-01-31 16:12:07,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:07,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740501303] [2024-01-31 16:12:07,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:07,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:07,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:07,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740501303] [2024-01-31 16:12:07,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740501303] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:07,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:07,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:12:07,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161694987] [2024-01-31 16:12:07,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:07,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:07,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:07,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:07,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:12:07,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:12:07,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 48 transitions, 418 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:07,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:07,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:12:07,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:07,928 INFO L124 PetriNetUnfolderBase]: 183/386 cut-off events. [2024-01-31 16:12:07,928 INFO L125 PetriNetUnfolderBase]: For 529/529 co-relation queries the response was YES. [2024-01-31 16:12:07,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1575 conditions, 386 events. 183/386 cut-off events. For 529/529 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1507 event pairs, 0 based on Foata normal form. 1/370 useless extension candidates. Maximal degree in co-relation 1558. Up to 122 conditions per place. [2024-01-31 16:12:07,931 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 36 selfloop transitions, 22 changer transitions 18/79 dead transitions. [2024-01-31 16:12:07,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 79 transitions, 635 flow [2024-01-31 16:12:07,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:12:07,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:12:07,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 293 transitions. [2024-01-31 16:12:07,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195035460992907 [2024-01-31 16:12:07,932 INFO L175 Difference]: Start difference. First operand has 104 places, 48 transitions, 418 flow. Second operand 12 states and 293 transitions. [2024-01-31 16:12:07,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 79 transitions, 635 flow [2024-01-31 16:12:07,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 79 transitions, 577 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-01-31 16:12:07,936 INFO L231 Difference]: Finished difference. Result has 97 places, 45 transitions, 376 flow [2024-01-31 16:12:07,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=376, PETRI_PLACES=97, PETRI_TRANSITIONS=45} [2024-01-31 16:12:07,936 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 48 predicate places. [2024-01-31 16:12:07,936 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 45 transitions, 376 flow [2024-01-31 16:12:07,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:07,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:07,937 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] [2024-01-31 16:12:07,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-01-31 16:12:07,937 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:07,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:07,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1327519090, now seen corresponding path program 17 times [2024-01-31 16:12:07,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:07,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681500548] [2024-01-31 16:12:07,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:07,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:08,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:08,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681500548] [2024-01-31 16:12:08,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681500548] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:08,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:08,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:12:08,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572297597] [2024-01-31 16:12:08,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:08,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:08,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:08,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:08,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:12:08,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:12:08,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 45 transitions, 376 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:08,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:08,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:12:08,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:08,331 INFO L124 PetriNetUnfolderBase]: 139/297 cut-off events. [2024-01-31 16:12:08,331 INFO L125 PetriNetUnfolderBase]: For 400/400 co-relation queries the response was YES. [2024-01-31 16:12:08,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1220 conditions, 297 events. 139/297 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1031 event pairs, 0 based on Foata normal form. 1/287 useless extension candidates. Maximal degree in co-relation 1206. Up to 72 conditions per place. [2024-01-31 16:12:08,333 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 31 selfloop transitions, 16 changer transitions 20/70 dead transitions. [2024-01-31 16:12:08,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 70 transitions, 562 flow [2024-01-31 16:12:08,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:12:08,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:12:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 286 transitions. [2024-01-31 16:12:08,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070921985815603 [2024-01-31 16:12:08,335 INFO L175 Difference]: Start difference. First operand has 97 places, 45 transitions, 376 flow. Second operand 12 states and 286 transitions. [2024-01-31 16:12:08,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 70 transitions, 562 flow [2024-01-31 16:12:08,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 70 transitions, 507 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-01-31 16:12:08,338 INFO L231 Difference]: Finished difference. Result has 94 places, 40 transitions, 308 flow [2024-01-31 16:12:08,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=308, PETRI_PLACES=94, PETRI_TRANSITIONS=40} [2024-01-31 16:12:08,338 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 45 predicate places. [2024-01-31 16:12:08,339 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 40 transitions, 308 flow [2024-01-31 16:12:08,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:08,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:08,339 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] [2024-01-31 16:12:08,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-01-31 16:12:08,339 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:08,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:08,340 INFO L85 PathProgramCache]: Analyzing trace with hash -822427496, now seen corresponding path program 18 times [2024-01-31 16:12:08,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:08,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79238405] [2024-01-31 16:12:08,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:08,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:08,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:08,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79238405] [2024-01-31 16:12:08,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79238405] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:08,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:08,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:12:08,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96650703] [2024-01-31 16:12:08,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:08,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:08,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:08,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:08,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:12:08,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:12:08,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 40 transitions, 308 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:08,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:08,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:12:08,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:08,746 INFO L124 PetriNetUnfolderBase]: 150/353 cut-off events. [2024-01-31 16:12:08,747 INFO L125 PetriNetUnfolderBase]: For 288/288 co-relation queries the response was YES. [2024-01-31 16:12:08,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1358 conditions, 353 events. 150/353 cut-off events. For 288/288 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1482 event pairs, 12 based on Foata normal form. 2/352 useless extension candidates. Maximal degree in co-relation 1344. Up to 112 conditions per place. [2024-01-31 16:12:08,752 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 40 selfloop transitions, 12 changer transitions 16/71 dead transitions. [2024-01-31 16:12:08,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 71 transitions, 558 flow [2024-01-31 16:12:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:12:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:12:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-01-31 16:12:08,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145067698259188 [2024-01-31 16:12:08,755 INFO L175 Difference]: Start difference. First operand has 94 places, 40 transitions, 308 flow. Second operand 11 states and 266 transitions. [2024-01-31 16:12:08,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 71 transitions, 558 flow [2024-01-31 16:12:08,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 71 transitions, 481 flow, removed 4 selfloop flow, removed 15 redundant places. [2024-01-31 16:12:08,759 INFO L231 Difference]: Finished difference. Result has 83 places, 38 transitions, 241 flow [2024-01-31 16:12:08,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=241, PETRI_PLACES=83, PETRI_TRANSITIONS=38} [2024-01-31 16:12:08,761 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 34 predicate places. [2024-01-31 16:12:08,761 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 38 transitions, 241 flow [2024-01-31 16:12:08,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:08,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:08,762 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] [2024-01-31 16:12:08,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-01-31 16:12:08,762 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:08,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:08,763 INFO L85 PathProgramCache]: Analyzing trace with hash 303575192, now seen corresponding path program 19 times [2024-01-31 16:12:08,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:08,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6770224] [2024-01-31 16:12:08,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:08,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:08,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:08,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:08,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6770224] [2024-01-31 16:12:08,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6770224] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:08,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:08,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:12:08,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855392607] [2024-01-31 16:12:08,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:08,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:08,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:08,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:08,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:12:08,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:12:08,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 38 transitions, 241 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:08,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:08,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:12:08,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:09,105 INFO L124 PetriNetUnfolderBase]: 94/235 cut-off events. [2024-01-31 16:12:09,106 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2024-01-31 16:12:09,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 832 conditions, 235 events. 94/235 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 824 event pairs, 12 based on Foata normal form. 2/234 useless extension candidates. Maximal degree in co-relation 820. Up to 72 conditions per place. [2024-01-31 16:12:09,107 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 26 selfloop transitions, 6 changer transitions 20/55 dead transitions. [2024-01-31 16:12:09,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 55 transitions, 398 flow [2024-01-31 16:12:09,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:12:09,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:12:09,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-01-31 16:12:09,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508274231678487 [2024-01-31 16:12:09,108 INFO L175 Difference]: Start difference. First operand has 83 places, 38 transitions, 241 flow. Second operand 9 states and 215 transitions. [2024-01-31 16:12:09,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 55 transitions, 398 flow [2024-01-31 16:12:09,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 55 transitions, 362 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-01-31 16:12:09,110 INFO L231 Difference]: Finished difference. Result has 82 places, 32 transitions, 159 flow [2024-01-31 16:12:09,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=159, PETRI_PLACES=82, PETRI_TRANSITIONS=32} [2024-01-31 16:12:09,110 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 33 predicate places. [2024-01-31 16:12:09,110 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 32 transitions, 159 flow [2024-01-31 16:12:09,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:09,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:09,111 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] [2024-01-31 16:12:09,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-01-31 16:12:09,111 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 26 more)] === [2024-01-31 16:12:09,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:09,111 INFO L85 PathProgramCache]: Analyzing trace with hash 837938372, now seen corresponding path program 20 times [2024-01-31 16:12:09,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:09,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760928446] [2024-01-31 16:12:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:09,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:09,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:09,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760928446] [2024-01-31 16:12:09,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760928446] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:12:09,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:12:09,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-01-31 16:12:09,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147318698] [2024-01-31 16:12:09,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:12:09,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:12:09,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:09,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:12:09,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:12:09,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-01-31 16:12:09,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 32 transitions, 159 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:09,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:09,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-01-31 16:12:09,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:09,418 INFO L124 PetriNetUnfolderBase]: 38/109 cut-off events. [2024-01-31 16:12:09,419 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-01-31 16:12:09,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 109 events. 38/109 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 243 event pairs, 0 based on Foata normal form. 2/108 useless extension candidates. Maximal degree in co-relation 370. Up to 46 conditions per place. [2024-01-31 16:12:09,419 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2024-01-31 16:12:09,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 37 transitions, 237 flow [2024-01-31 16:12:09,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:12:09,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:12:09,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-01-31 16:12:09,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4799054373522459 [2024-01-31 16:12:09,421 INFO L175 Difference]: Start difference. First operand has 82 places, 32 transitions, 159 flow. Second operand 9 states and 203 transitions. [2024-01-31 16:12:09,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 37 transitions, 237 flow [2024-01-31 16:12:09,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 37 transitions, 219 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-01-31 16:12:09,422 INFO L231 Difference]: Finished difference. Result has 74 places, 0 transitions, 0 flow [2024-01-31 16:12:09,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=74, PETRI_TRANSITIONS=0} [2024-01-31 16:12:09,422 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 25 predicate places. [2024-01-31 16:12:09,423 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 0 transitions, 0 flow [2024-01-31 16:12:09,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:12:09,425 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 29 remaining) [2024-01-31 16:12:09,426 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 29 remaining) [2024-01-31 16:12:09,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 29 remaining) [2024-01-31 16:12:09,428 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 29 remaining) [2024-01-31 16:12:09,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 29 remaining) [2024-01-31 16:12:09,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 29 remaining) [2024-01-31 16:12:09,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 29 remaining) [2024-01-31 16:12:09,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 29 remaining) [2024-01-31 16:12:09,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 29 remaining) [2024-01-31 16:12:09,429 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 29 remaining) [2024-01-31 16:12:09,430 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 29 remaining) [2024-01-31 16:12:09,430 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 29 remaining) [2024-01-31 16:12:09,430 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 29 remaining) [2024-01-31 16:12:09,430 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 29 remaining) [2024-01-31 16:12:09,430 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (14 of 29 remaining) [2024-01-31 16:12:09,430 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 29 remaining) [2024-01-31 16:12:09,431 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 29 remaining) [2024-01-31 16:12:09,431 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 29 remaining) [2024-01-31 16:12:09,435 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 29 remaining) [2024-01-31 16:12:09,436 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 29 remaining) [2024-01-31 16:12:09,436 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 29 remaining) [2024-01-31 16:12:09,436 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 29 remaining) [2024-01-31 16:12:09,436 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 29 remaining) [2024-01-31 16:12:09,436 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 29 remaining) [2024-01-31 16:12:09,437 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 29 remaining) [2024-01-31 16:12:09,437 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 29 remaining) [2024-01-31 16:12:09,437 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 29 remaining) [2024-01-31 16:12:09,437 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 29 remaining) [2024-01-31 16:12:09,438 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 29 remaining) [2024-01-31 16:12:09,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-01-31 16:12:09,438 INFO L445 BasicCegarLoop]: Path program histogram: [20, 10, 7, 6, 1, 1, 1, 1] [2024-01-31 16:12:09,443 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-01-31 16:12:09,443 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-01-31 16:12:09,449 INFO L503 ceAbstractionStarter]: Automizer considered 14 witness invariants [2024-01-31 16:12:09,449 INFO L504 ceAbstractionStarter]: WitnessConsidered=14 [2024-01-31 16:12:09,451 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 04:12:09 BasicIcfg [2024-01-31 16:12:09,451 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-01-31 16:12:09,451 INFO L158 Benchmark]: Toolchain (without parser) took 23832.52ms. Allocated memory was 142.6MB in the beginning and 459.3MB in the end (delta: 316.7MB). Free memory was 81.9MB in the beginning and 340.9MB in the end (delta: -259.1MB). Peak memory consumption was 59.7MB. Max. memory is 16.1GB. [2024-01-31 16:12:09,452 INFO L158 Benchmark]: Witness Parser took 0.19ms. Allocated memory is still 142.6MB. Free memory is still 102.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-01-31 16:12:09,452 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 142.6MB. Free memory is still 98.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-01-31 16:12:09,452 INFO L158 Benchmark]: CACSL2BoogieTranslator took 336.65ms. Allocated memory is still 142.6MB. Free memory was 81.9MB in the beginning and 67.2MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-01-31 16:12:09,452 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.33ms. Allocated memory is still 142.6MB. Free memory was 67.2MB in the beginning and 65.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-31 16:12:09,453 INFO L158 Benchmark]: Boogie Preprocessor took 38.12ms. Allocated memory is still 142.6MB. Free memory was 65.4MB in the beginning and 63.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-31 16:12:09,456 INFO L158 Benchmark]: RCFGBuilder took 521.47ms. Allocated memory was 142.6MB in the beginning and 178.3MB in the end (delta: 35.7MB). Free memory was 63.4MB in the beginning and 128.0MB in the end (delta: -64.6MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. [2024-01-31 16:12:09,456 INFO L158 Benchmark]: TraceAbstraction took 22898.71ms. Allocated memory was 178.3MB in the beginning and 459.3MB in the end (delta: 281.0MB). Free memory was 128.0MB in the beginning and 340.9MB in the end (delta: -212.9MB). Peak memory consumption was 67.0MB. Max. memory is 16.1GB. [2024-01-31 16:12:09,458 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.19ms. Allocated memory is still 142.6MB. Free memory is still 102.0MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.11ms. Allocated memory is still 142.6MB. Free memory is still 98.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 336.65ms. Allocated memory is still 142.6MB. Free memory was 81.9MB in the beginning and 67.2MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.33ms. Allocated memory is still 142.6MB. Free memory was 67.2MB in the beginning and 65.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.12ms. Allocated memory is still 142.6MB. Free memory was 65.4MB in the beginning and 63.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 521.47ms. Allocated memory was 142.6MB in the beginning and 178.3MB in the end (delta: 35.7MB). Free memory was 63.4MB in the beginning and 128.0MB in the end (delta: -64.6MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. * TraceAbstraction took 22898.71ms. Allocated memory was 178.3MB in the beginning and 459.3MB in the end (delta: 281.0MB). Free memory was 128.0MB in the beginning and 340.9MB in the end (delta: -212.9MB). Peak memory consumption was 67.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 42]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 43]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 44]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 46]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 48]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 50]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 54]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 55]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 56]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 58]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 60]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 62]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 68]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 70]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 76]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 78 locations, 29 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 22.7s, OverallIterations: 47, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 13.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4465 SdHoareTripleChecker+Valid, 7.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4285 mSDsluCounter, 9 SdHoareTripleChecker+Invalid, 5.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 67 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11416 IncrementalHoareTripleChecker+Invalid, 11483 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 67 mSolverCounterUnsat, 9 mSDtfsCounter, 11416 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 844 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 510 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=821occurred in iteration=27, InterpolantAutomatonStates: 478, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.7s InterpolantComputationTime, 1137 NumberOfCodeBlocks, 1137 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 1090 ConstructedInterpolants, 0 QuantifiedInterpolants, 6543 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 47 InterpolantComputations, 47 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 15 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-01-31 16:12:09,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE