./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_rmo.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe027_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe027_rmo.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe027_rmo.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-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 22:52:49,127 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 22:52:49,224 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 22:52:49,229 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 22:52:49,229 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 22:52:49,267 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 22:52:49,267 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 22:52:49,268 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 22:52:49,268 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 22:52:49,272 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 22:52:49,272 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 22:52:49,273 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 22:52:49,274 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 22:52:49,275 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 22:52:49,275 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 22:52:49,275 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 22:52:49,276 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 22:52:49,276 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 22:52:49,276 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 22:52:49,276 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 22:52:49,277 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 22:52:49,278 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 22:52:49,278 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 22:52:49,278 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 22:52:49,279 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 22:52:49,279 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 22:52:49,279 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 22:52:49,279 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 22:52:49,280 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 22:52:49,280 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 22:52:49,281 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 22:52:49,281 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 22:52:49,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 22:52:49,282 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 22:52:49,282 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 22:52:49,282 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 22:52:49,282 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 22:52:49,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 22:52:49,283 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 22:52:49,283 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 22:52:49,283 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 22:52:49,283 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 22:52:49,284 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 22:52:49,284 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 22:52:49,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 22:52:49,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 22:52:49,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 22:52:49,545 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 22:52:49,545 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 22:52:49,546 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_rmo.i [2024-06-27 22:52:50,713 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 22:52:50,985 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 22:52:50,986 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_rmo.i [2024-06-27 22:52:51,005 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53e501e73/a7eb5513cc7d40468f2fa527e76df10c/FLAG152ba8970 [2024-06-27 22:52:51,024 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53e501e73/a7eb5513cc7d40468f2fa527e76df10c [2024-06-27 22:52:51,027 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 22:52:51,027 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 22:52:51,030 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe027_rmo.yml/witness.yml [2024-06-27 22:52:51,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 22:52:51,120 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 22:52:51,121 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 22:52:51,121 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 22:52:51,126 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 22:52:51,127 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 10:52:51" (1/2) ... [2024-06-27 22:52:51,128 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48515523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:52:51, skipping insertion in model container [2024-06-27 22:52:51,128 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 10:52:51" (1/2) ... [2024-06-27 22:52:51,131 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@621f3210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:52:51, skipping insertion in model container [2024-06-27 22:52:51,131 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 10:52:51" (2/2) ... [2024-06-27 22:52:51,132 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48515523 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:52:51, skipping insertion in model container [2024-06-27 22:52:51,133 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 10:52:51" (2/2) ... [2024-06-27 22:52:51,133 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 22:52:51,167 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 22:52:51,169 INFO L97 edCorrectnessWitness]: Location invariant before [L868-L868] ! multithreaded || (((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) [2024-06-27 22:52:51,169 INFO L97 edCorrectnessWitness]: Location invariant before [L870-L870] ! multithreaded || (((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) [2024-06-27 22:52:51,169 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] ! multithreaded || (((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) [2024-06-27 22:52:51,169 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] ! multithreaded || (((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (long long )y - (long long )y$mem_tmp >= 0LL) [2024-06-27 22:52:51,170 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 22:52:51,170 INFO L106 edCorrectnessWitness]: ghost_update [L864-L864] multithreaded = 1; [2024-06-27 22:52:51,222 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 22:52:51,364 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_rmo.i[988,1001] [2024-06-27 22:52:51,521 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 22:52:51,532 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 22:52:51,589 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_rmo.i[988,1001] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 22:52:51,710 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 22:52:51,766 INFO L206 MainTranslator]: Completed translation [2024-06-27 22:52:51,766 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:52:51 WrapperNode [2024-06-27 22:52:51,766 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 22:52:51,767 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 22:52:51,768 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 22:52:51,768 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 22:52:51,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:52:51" (1/1) ... [2024-06-27 22:52:51,808 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:52:51" (1/1) ... [2024-06-27 22:52:51,840 INFO L138 Inliner]: procedures = 176, calls = 74, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 172 [2024-06-27 22:52:51,841 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 22:52:51,841 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 22:52:51,841 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 22:52:51,842 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 22:52:51,852 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:52:51" (1/1) ... [2024-06-27 22:52:51,852 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:52:51" (1/1) ... [2024-06-27 22:52:51,855 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:52:51" (1/1) ... [2024-06-27 22:52:51,889 INFO L175 MemorySlicer]: Split 29 memory accesses to 2 slices as follows [2, 27]. 93 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-27 22:52:51,890 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:52:51" (1/1) ... [2024-06-27 22:52:51,890 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:52:51" (1/1) ... [2024-06-27 22:52:51,898 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:52:51" (1/1) ... [2024-06-27 22:52:51,900 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:52:51" (1/1) ... [2024-06-27 22:52:51,902 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:52:51" (1/1) ... [2024-06-27 22:52:51,915 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:52:51" (1/1) ... [2024-06-27 22:52:51,919 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 22:52:51,920 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 22:52:51,920 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 22:52:51,920 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 22:52:51,920 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:52:51" (1/1) ... [2024-06-27 22:52:51,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 22:52:51,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 22:52:51,957 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) [2024-06-27 22:52:51,958 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 [2024-06-27 22:52:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 22:52:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 22:52:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 22:52:51,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 22:52:51,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 22:52:51,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 22:52:51,992 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 22:52:51,992 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 22:52:51,992 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 22:52:51,993 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 22:52:51,993 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 22:52:51,993 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 22:52:51,993 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 22:52:51,993 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 22:52:51,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 22:52:51,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 22:52:51,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 22:52:51,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 22:52:51,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 22:52:51,997 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 22:52:52,138 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 22:52:52,140 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 22:52:52,590 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 22:52:52,590 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 22:52:52,878 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 22:52:52,878 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 22:52:52,879 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 10:52:52 BoogieIcfgContainer [2024-06-27 22:52:52,879 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 22:52:52,883 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 22:52:52,883 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 22:52:52,886 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 22:52:52,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 10:52:51" (1/4) ... [2024-06-27 22:52:52,887 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@977384b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 10:52:52, skipping insertion in model container [2024-06-27 22:52:52,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 10:52:51" (2/4) ... [2024-06-27 22:52:52,888 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@977384b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 10:52:52, skipping insertion in model container [2024-06-27 22:52:52,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:52:51" (3/4) ... [2024-06-27 22:52:52,890 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@977384b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 10:52:52, skipping insertion in model container [2024-06-27 22:52:52,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 10:52:52" (4/4) ... [2024-06-27 22:52:52,891 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_rmo.i [2024-06-27 22:52:52,907 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 22:52:52,908 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 22:52:52,908 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 22:52:52,966 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 22:52:53,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 57 transitions, 130 flow [2024-06-27 22:52:53,041 INFO L124 PetriNetUnfolderBase]: 1/53 cut-off events. [2024-06-27 22:52:53,041 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 22:52:53,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 53 events. 1/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2024-06-27 22:52:53,046 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 57 transitions, 130 flow [2024-06-27 22:52:53,050 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 50 transitions, 112 flow [2024-06-27 22:52:53,066 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 22:52:53,077 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;@7e3e419a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 22:52:53,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 22:52:53,084 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 22:52:53,084 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 22:52:53,084 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 22:52:53,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:52:53,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 22:52:53,085 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:52:53,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:52:53,090 INFO L85 PathProgramCache]: Analyzing trace with hash 633298126, now seen corresponding path program 1 times [2024-06-27 22:52:53,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:52:53,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087849874] [2024-06-27 22:52:53,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:52:53,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:52:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:52:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:52:53,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:52:53,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087849874] [2024-06-27 22:52:53,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087849874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:52:53,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:52:53,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 22:52:53,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771695057] [2024-06-27 22:52:53,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:52:53,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 22:52:53,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:52:53,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 22:52:53,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 22:52:53,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-06-27 22:52:53,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:52:53,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:52:53,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-06-27 22:52:53,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:52:54,838 INFO L124 PetriNetUnfolderBase]: 2896/4720 cut-off events. [2024-06-27 22:52:54,838 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-06-27 22:52:54,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8866 conditions, 4720 events. 2896/4720 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31266 event pairs, 1821 based on Foata normal form. 0/4477 useless extension candidates. Maximal degree in co-relation 8853. Up to 4043 conditions per place. [2024-06-27 22:52:54,881 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 49 selfloop transitions, 6 changer transitions 0/71 dead transitions. [2024-06-27 22:52:54,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 71 transitions, 273 flow [2024-06-27 22:52:54,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 22:52:54,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 22:52:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2024-06-27 22:52:54,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7134502923976608 [2024-06-27 22:52:54,896 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 112 flow. Second operand 3 states and 122 transitions. [2024-06-27 22:52:54,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 71 transitions, 273 flow [2024-06-27 22:52:54,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 71 transitions, 266 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 22:52:54,905 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 154 flow [2024-06-27 22:52:54,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2024-06-27 22:52:54,910 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2024-06-27 22:52:54,911 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 154 flow [2024-06-27 22:52:54,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:52:54,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:52:54,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:52:54,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 22:52:54,912 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:52:54,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:52:54,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1284922767, now seen corresponding path program 1 times [2024-06-27 22:52:54,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:52:54,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971521532] [2024-06-27 22:52:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:52:54,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:52:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:52:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:52:55,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:52:55,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971521532] [2024-06-27 22:52:55,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971521532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:52:55,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:52:55,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 22:52:55,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548732901] [2024-06-27 22:52:55,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:52:55,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 22:52:55,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:52:55,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 22:52:55,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 22:52:55,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-06-27 22:52:55,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:52:55,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:52:55,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-06-27 22:52:55,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:52:56,194 INFO L124 PetriNetUnfolderBase]: 2848/4590 cut-off events. [2024-06-27 22:52:56,194 INFO L125 PetriNetUnfolderBase]: For 1022/1031 co-relation queries the response was YES. [2024-06-27 22:52:56,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10284 conditions, 4590 events. 2848/4590 cut-off events. For 1022/1031 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 30502 event pairs, 1211 based on Foata normal form. 22/4529 useless extension candidates. Maximal degree in co-relation 10272. Up to 3771 conditions per place. [2024-06-27 22:52:56,231 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 50 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2024-06-27 22:52:56,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 73 transitions, 316 flow [2024-06-27 22:52:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 22:52:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 22:52:56,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2024-06-27 22:52:56,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.695906432748538 [2024-06-27 22:52:56,233 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 154 flow. Second operand 3 states and 119 transitions. [2024-06-27 22:52:56,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 73 transitions, 316 flow [2024-06-27 22:52:56,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 73 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 22:52:56,236 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 189 flow [2024-06-27 22:52:56,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-06-27 22:52:56,237 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2024-06-27 22:52:56,237 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 189 flow [2024-06-27 22:52:56,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:52:56,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:52:56,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:52:56,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 22:52:56,238 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:52:56,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:52:56,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1594454656, now seen corresponding path program 1 times [2024-06-27 22:52:56,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:52:56,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607064566] [2024-06-27 22:52:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:52:56,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:52:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:52:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:52:56,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:52:56,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607064566] [2024-06-27 22:52:56,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607064566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:52:56,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:52:56,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 22:52:56,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375389540] [2024-06-27 22:52:56,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:52:56,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 22:52:56,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:52:56,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 22:52:56,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 22:52:56,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:52:56,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:52:56,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:52:56,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:52:56,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:52:57,663 INFO L124 PetriNetUnfolderBase]: 5348/8382 cut-off events. [2024-06-27 22:52:57,663 INFO L125 PetriNetUnfolderBase]: For 3486/3486 co-relation queries the response was YES. [2024-06-27 22:52:57,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20018 conditions, 8382 events. 5348/8382 cut-off events. For 3486/3486 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 55817 event pairs, 3027 based on Foata normal form. 6/8309 useless extension candidates. Maximal degree in co-relation 20004. Up to 7284 conditions per place. [2024-06-27 22:52:57,733 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 71 selfloop transitions, 10 changer transitions 0/95 dead transitions. [2024-06-27 22:52:57,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 95 transitions, 464 flow [2024-06-27 22:52:57,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:52:57,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:52:57,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-06-27 22:52:57,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 22:52:57,741 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 189 flow. Second operand 4 states and 152 transitions. [2024-06-27 22:52:57,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 95 transitions, 464 flow [2024-06-27 22:52:57,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 95 transitions, 454 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 22:52:57,747 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 277 flow [2024-06-27 22:52:57,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=277, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-27 22:52:57,749 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2024-06-27 22:52:57,749 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 277 flow [2024-06-27 22:52:57,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:52:57,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:52:57,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:52:57,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 22:52:57,750 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:52:57,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:52:57,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1026739295, now seen corresponding path program 1 times [2024-06-27 22:52:57,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:52:57,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822191707] [2024-06-27 22:52:57,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:52:57,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:52:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:52:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:52:58,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:52:58,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822191707] [2024-06-27 22:52:58,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822191707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:52:58,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:52:58,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:52:58,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132838920] [2024-06-27 22:52:58,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:52:58,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:52:58,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:52:58,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:52:58,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:52:58,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:52:58,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:52:58,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:52:58,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:52:58,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:52:59,287 INFO L124 PetriNetUnfolderBase]: 5333/8362 cut-off events. [2024-06-27 22:52:59,288 INFO L125 PetriNetUnfolderBase]: For 6229/6229 co-relation queries the response was YES. [2024-06-27 22:52:59,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21527 conditions, 8362 events. 5333/8362 cut-off events. For 6229/6229 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 55726 event pairs, 2273 based on Foata normal form. 6/8291 useless extension candidates. Maximal degree in co-relation 21510. Up to 7154 conditions per place. [2024-06-27 22:52:59,342 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 73 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2024-06-27 22:52:59,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 104 transitions, 571 flow [2024-06-27 22:52:59,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:52:59,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:52:59,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 154 transitions. [2024-06-27 22:52:59,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6754385964912281 [2024-06-27 22:52:59,344 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 277 flow. Second operand 4 states and 154 transitions. [2024-06-27 22:52:59,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 104 transitions, 571 flow [2024-06-27 22:52:59,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 561 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-27 22:52:59,350 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 386 flow [2024-06-27 22:52:59,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=386, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-06-27 22:52:59,351 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2024-06-27 22:52:59,351 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 386 flow [2024-06-27 22:52:59,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:52:59,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:52:59,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:52:59,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 22:52:59,352 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:52:59,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:52:59,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1828452951, now seen corresponding path program 1 times [2024-06-27 22:52:59,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:52:59,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197213860] [2024-06-27 22:52:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:52:59,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:52:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:52:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:52:59,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:52:59,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197213860] [2024-06-27 22:52:59,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197213860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:52:59,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:52:59,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:52:59,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028619804] [2024-06-27 22:52:59,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:52:59,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:52:59,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:52:59,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:52:59,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:52:59,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 57 [2024-06-27 22:52:59,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 386 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:52:59,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:52:59,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 57 [2024-06-27 22:52:59,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:01,424 INFO L124 PetriNetUnfolderBase]: 7185/11274 cut-off events. [2024-06-27 22:53:01,424 INFO L125 PetriNetUnfolderBase]: For 13933/13941 co-relation queries the response was YES. [2024-06-27 22:53:01,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31856 conditions, 11274 events. 7185/11274 cut-off events. For 13933/13941 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 78058 event pairs, 1853 based on Foata normal form. 40/11239 useless extension candidates. Maximal degree in co-relation 31834. Up to 7780 conditions per place. [2024-06-27 22:53:01,510 INFO L140 encePairwiseOnDemand]: 40/57 looper letters, 144 selfloop transitions, 44 changer transitions 0/201 dead transitions. [2024-06-27 22:53:01,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 201 transitions, 1236 flow [2024-06-27 22:53:01,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:53:01,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:53:01,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 304 transitions. [2024-06-27 22:53:01,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 22:53:01,518 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 386 flow. Second operand 8 states and 304 transitions. [2024-06-27 22:53:01,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 201 transitions, 1236 flow [2024-06-27 22:53:01,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 201 transitions, 1218 flow, removed 9 selfloop flow, removed 0 redundant places. [2024-06-27 22:53:01,539 INFO L231 Difference]: Finished difference. Result has 83 places, 109 transitions, 772 flow [2024-06-27 22:53:01,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=772, PETRI_PLACES=83, PETRI_TRANSITIONS=109} [2024-06-27 22:53:01,542 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 20 predicate places. [2024-06-27 22:53:01,542 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 109 transitions, 772 flow [2024-06-27 22:53:01,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:01,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:01,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:53:01,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 22:53:01,543 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:01,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:01,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1764028819, now seen corresponding path program 2 times [2024-06-27 22:53:01,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:01,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447441774] [2024-06-27 22:53:01,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:01,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:01,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:53:01,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:01,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447441774] [2024-06-27 22:53:01,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447441774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:01,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:01,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:53:01,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835887869] [2024-06-27 22:53:01,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:01,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:53:01,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:01,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:53:01,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:53:01,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:01,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 109 transitions, 772 flow. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:01,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:01,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:01,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:03,378 INFO L124 PetriNetUnfolderBase]: 7894/12399 cut-off events. [2024-06-27 22:53:03,379 INFO L125 PetriNetUnfolderBase]: For 29225/29229 co-relation queries the response was YES. [2024-06-27 22:53:03,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42101 conditions, 12399 events. 7894/12399 cut-off events. For 29225/29229 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 86927 event pairs, 1458 based on Foata normal form. 61/12347 useless extension candidates. Maximal degree in co-relation 42073. Up to 9114 conditions per place. [2024-06-27 22:53:03,515 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 106 selfloop transitions, 39 changer transitions 0/159 dead transitions. [2024-06-27 22:53:03,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 159 transitions, 1298 flow [2024-06-27 22:53:03,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:53:03,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:53:03,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 156 transitions. [2024-06-27 22:53:03,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6842105263157895 [2024-06-27 22:53:03,517 INFO L175 Difference]: Start difference. First operand has 83 places, 109 transitions, 772 flow. Second operand 4 states and 156 transitions. [2024-06-27 22:53:03,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 159 transitions, 1298 flow [2024-06-27 22:53:03,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 159 transitions, 1278 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 22:53:03,564 INFO L231 Difference]: Finished difference. Result has 85 places, 122 transitions, 990 flow [2024-06-27 22:53:03,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=990, PETRI_PLACES=85, PETRI_TRANSITIONS=122} [2024-06-27 22:53:03,568 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 22 predicate places. [2024-06-27 22:53:03,569 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 122 transitions, 990 flow [2024-06-27 22:53:03,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:03,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:03,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:53:03,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 22:53:03,570 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:03,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:03,570 INFO L85 PathProgramCache]: Analyzing trace with hash 354819587, now seen corresponding path program 3 times [2024-06-27 22:53:03,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:03,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774953410] [2024-06-27 22:53:03,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:03,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:53:03,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:03,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774953410] [2024-06-27 22:53:03,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774953410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:03,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:03,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:53:03,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411205901] [2024-06-27 22:53:03,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:03,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:53:03,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:03,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:53:03,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:53:03,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:03,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 122 transitions, 990 flow. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:03,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:03,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:03,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:05,410 INFO L124 PetriNetUnfolderBase]: 7902/12480 cut-off events. [2024-06-27 22:53:05,410 INFO L125 PetriNetUnfolderBase]: For 37616/37620 co-relation queries the response was YES. [2024-06-27 22:53:05,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46524 conditions, 12480 events. 7902/12480 cut-off events. For 37616/37620 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 88030 event pairs, 1524 based on Foata normal form. 13/12342 useless extension candidates. Maximal degree in co-relation 46495. Up to 9853 conditions per place. [2024-06-27 22:53:05,508 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 142 selfloop transitions, 35 changer transitions 0/191 dead transitions. [2024-06-27 22:53:05,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 191 transitions, 1757 flow [2024-06-27 22:53:05,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:53:05,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:53:05,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 189 transitions. [2024-06-27 22:53:05,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6631578947368421 [2024-06-27 22:53:05,510 INFO L175 Difference]: Start difference. First operand has 85 places, 122 transitions, 990 flow. Second operand 5 states and 189 transitions. [2024-06-27 22:53:05,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 191 transitions, 1757 flow [2024-06-27 22:53:05,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 191 transitions, 1656 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 22:53:05,576 INFO L231 Difference]: Finished difference. Result has 89 places, 137 transitions, 1224 flow [2024-06-27 22:53:05,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1224, PETRI_PLACES=89, PETRI_TRANSITIONS=137} [2024-06-27 22:53:05,577 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 26 predicate places. [2024-06-27 22:53:05,577 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 137 transitions, 1224 flow [2024-06-27 22:53:05,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:05,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:05,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:53:05,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 22:53:05,578 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:05,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:05,578 INFO L85 PathProgramCache]: Analyzing trace with hash 25744414, now seen corresponding path program 1 times [2024-06-27 22:53:05,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:05,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285414719] [2024-06-27 22:53:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:05,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:05,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:53:05,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:05,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285414719] [2024-06-27 22:53:05,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285414719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:05,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:05,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:53:05,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290626016] [2024-06-27 22:53:05,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:05,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:53:05,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:05,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:53:05,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:53:05,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:05,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 137 transitions, 1224 flow. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:05,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:05,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:05,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:07,258 INFO L124 PetriNetUnfolderBase]: 7890/12459 cut-off events. [2024-06-27 22:53:07,258 INFO L125 PetriNetUnfolderBase]: For 46450/46452 co-relation queries the response was YES. [2024-06-27 22:53:07,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48694 conditions, 12459 events. 7890/12459 cut-off events. For 46450/46452 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 87598 event pairs, 2736 based on Foata normal form. 6/12292 useless extension candidates. Maximal degree in co-relation 48662. Up to 10656 conditions per place. [2024-06-27 22:53:07,381 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 146 selfloop transitions, 22 changer transitions 0/182 dead transitions. [2024-06-27 22:53:07,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 182 transitions, 1746 flow [2024-06-27 22:53:07,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:53:07,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:53:07,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 184 transitions. [2024-06-27 22:53:07,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6456140350877193 [2024-06-27 22:53:07,383 INFO L175 Difference]: Start difference. First operand has 89 places, 137 transitions, 1224 flow. Second operand 5 states and 184 transitions. [2024-06-27 22:53:07,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 182 transitions, 1746 flow [2024-06-27 22:53:07,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 182 transitions, 1726 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-27 22:53:07,498 INFO L231 Difference]: Finished difference. Result has 95 places, 145 transitions, 1367 flow [2024-06-27 22:53:07,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1204, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1367, PETRI_PLACES=95, PETRI_TRANSITIONS=145} [2024-06-27 22:53:07,500 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 32 predicate places. [2024-06-27 22:53:07,500 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 145 transitions, 1367 flow [2024-06-27 22:53:07,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:07,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:07,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:53:07,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 22:53:07,501 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:07,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:07,502 INFO L85 PathProgramCache]: Analyzing trace with hash 798079251, now seen corresponding path program 1 times [2024-06-27 22:53:07,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:07,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465882611] [2024-06-27 22:53:07,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:07,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:53:07,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:07,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465882611] [2024-06-27 22:53:07,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465882611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:07,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:07,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:53:07,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965207513] [2024-06-27 22:53:07,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:07,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:53:07,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:07,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:53:07,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:53:07,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:07,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 145 transitions, 1367 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:07,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:07,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:07,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:09,553 INFO L124 PetriNetUnfolderBase]: 7982/12619 cut-off events. [2024-06-27 22:53:09,554 INFO L125 PetriNetUnfolderBase]: For 54532/54532 co-relation queries the response was YES. [2024-06-27 22:53:09,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51024 conditions, 12619 events. 7982/12619 cut-off events. For 54532/54532 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 88911 event pairs, 2701 based on Foata normal form. 8/12452 useless extension candidates. Maximal degree in co-relation 50988. Up to 10476 conditions per place. [2024-06-27 22:53:09,677 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 161 selfloop transitions, 33 changer transitions 0/208 dead transitions. [2024-06-27 22:53:09,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 208 transitions, 2091 flow [2024-06-27 22:53:09,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:53:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:53:09,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 220 transitions. [2024-06-27 22:53:09,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6432748538011696 [2024-06-27 22:53:09,680 INFO L175 Difference]: Start difference. First operand has 95 places, 145 transitions, 1367 flow. Second operand 6 states and 220 transitions. [2024-06-27 22:53:09,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 208 transitions, 2091 flow [2024-06-27 22:53:09,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 208 transitions, 2018 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-27 22:53:09,799 INFO L231 Difference]: Finished difference. Result has 101 places, 157 transitions, 1579 flow [2024-06-27 22:53:09,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1294, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1579, PETRI_PLACES=101, PETRI_TRANSITIONS=157} [2024-06-27 22:53:09,799 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 38 predicate places. [2024-06-27 22:53:09,799 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 157 transitions, 1579 flow [2024-06-27 22:53:09,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:09,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:09,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:53:09,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 22:53:09,800 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:09,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:09,801 INFO L85 PathProgramCache]: Analyzing trace with hash 760401745, now seen corresponding path program 2 times [2024-06-27 22:53:09,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:09,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200049811] [2024-06-27 22:53:09,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:09,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:53:10,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:10,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200049811] [2024-06-27 22:53:10,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200049811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:10,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:10,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:53:10,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363759735] [2024-06-27 22:53:10,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:10,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:53:10,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:10,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:53:10,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:53:10,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:10,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 157 transitions, 1579 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:10,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:10,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:10,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:11,886 INFO L124 PetriNetUnfolderBase]: 8695/13666 cut-off events. [2024-06-27 22:53:11,886 INFO L125 PetriNetUnfolderBase]: For 74666/74670 co-relation queries the response was YES. [2024-06-27 22:53:11,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57677 conditions, 13666 events. 8695/13666 cut-off events. For 74666/74670 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 97473 event pairs, 1593 based on Foata normal form. 33/13583 useless extension candidates. Maximal degree in co-relation 57638. Up to 8913 conditions per place. [2024-06-27 22:53:12,000 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 155 selfloop transitions, 57 changer transitions 0/226 dead transitions. [2024-06-27 22:53:12,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 226 transitions, 2416 flow [2024-06-27 22:53:12,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:53:12,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:53:12,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 196 transitions. [2024-06-27 22:53:12,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6877192982456141 [2024-06-27 22:53:12,002 INFO L175 Difference]: Start difference. First operand has 101 places, 157 transitions, 1579 flow. Second operand 5 states and 196 transitions. [2024-06-27 22:53:12,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 226 transitions, 2416 flow [2024-06-27 22:53:12,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 226 transitions, 2339 flow, removed 36 selfloop flow, removed 1 redundant places. [2024-06-27 22:53:12,174 INFO L231 Difference]: Finished difference. Result has 107 places, 165 transitions, 1820 flow [2024-06-27 22:53:12,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1820, PETRI_PLACES=107, PETRI_TRANSITIONS=165} [2024-06-27 22:53:12,175 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 44 predicate places. [2024-06-27 22:53:12,175 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 165 transitions, 1820 flow [2024-06-27 22:53:12,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:12,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:12,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:53:12,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 22:53:12,176 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:12,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:12,177 INFO L85 PathProgramCache]: Analyzing trace with hash -476138081, now seen corresponding path program 1 times [2024-06-27 22:53:12,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:12,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076192311] [2024-06-27 22:53:12,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:12,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:53:12,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:12,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076192311] [2024-06-27 22:53:12,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076192311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:12,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:12,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:53:12,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315695019] [2024-06-27 22:53:12,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:12,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:53:12,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:12,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:53:12,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:53:12,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:12,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 165 transitions, 1820 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:12,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:12,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:12,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:14,294 INFO L124 PetriNetUnfolderBase]: 8683/13865 cut-off events. [2024-06-27 22:53:14,294 INFO L125 PetriNetUnfolderBase]: For 91551/91575 co-relation queries the response was YES. [2024-06-27 22:53:14,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62557 conditions, 13865 events. 8683/13865 cut-off events. For 91551/91575 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 100983 event pairs, 2619 based on Foata normal form. 22/13683 useless extension candidates. Maximal degree in co-relation 62513. Up to 11388 conditions per place. [2024-06-27 22:53:14,401 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 161 selfloop transitions, 55 changer transitions 0/230 dead transitions. [2024-06-27 22:53:14,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 230 transitions, 2746 flow [2024-06-27 22:53:14,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:53:14,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:53:14,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 189 transitions. [2024-06-27 22:53:14,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6631578947368421 [2024-06-27 22:53:14,405 INFO L175 Difference]: Start difference. First operand has 107 places, 165 transitions, 1820 flow. Second operand 5 states and 189 transitions. [2024-06-27 22:53:14,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 230 transitions, 2746 flow [2024-06-27 22:53:14,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 230 transitions, 2724 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-06-27 22:53:14,636 INFO L231 Difference]: Finished difference. Result has 114 places, 187 transitions, 2338 flow [2024-06-27 22:53:14,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2338, PETRI_PLACES=114, PETRI_TRANSITIONS=187} [2024-06-27 22:53:14,637 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 51 predicate places. [2024-06-27 22:53:14,638 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 187 transitions, 2338 flow [2024-06-27 22:53:14,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:14,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:14,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:53:14,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 22:53:14,638 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:14,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:14,639 INFO L85 PathProgramCache]: Analyzing trace with hash -635266025, now seen corresponding path program 2 times [2024-06-27 22:53:14,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:14,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733134061] [2024-06-27 22:53:14,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:14,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:53:14,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:14,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733134061] [2024-06-27 22:53:14,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733134061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:14,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:14,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:53:14,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404323823] [2024-06-27 22:53:14,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:14,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:53:14,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:14,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:53:14,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:53:14,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:14,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 187 transitions, 2338 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:14,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:14,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:14,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:16,741 INFO L124 PetriNetUnfolderBase]: 8709/13688 cut-off events. [2024-06-27 22:53:16,741 INFO L125 PetriNetUnfolderBase]: For 104841/104845 co-relation queries the response was YES. [2024-06-27 22:53:16,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64716 conditions, 13688 events. 8709/13688 cut-off events. For 104841/104845 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 97662 event pairs, 1450 based on Foata normal form. 13/13607 useless extension candidates. Maximal degree in co-relation 64667. Up to 8921 conditions per place. [2024-06-27 22:53:17,081 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 165 selfloop transitions, 75 changer transitions 0/254 dead transitions. [2024-06-27 22:53:17,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 254 transitions, 3179 flow [2024-06-27 22:53:17,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:53:17,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:53:17,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 200 transitions. [2024-06-27 22:53:17,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7017543859649122 [2024-06-27 22:53:17,083 INFO L175 Difference]: Start difference. First operand has 114 places, 187 transitions, 2338 flow. Second operand 5 states and 200 transitions. [2024-06-27 22:53:17,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 254 transitions, 3179 flow [2024-06-27 22:53:17,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 254 transitions, 3095 flow, removed 42 selfloop flow, removed 0 redundant places. [2024-06-27 22:53:17,409 INFO L231 Difference]: Finished difference. Result has 120 places, 194 transitions, 2595 flow [2024-06-27 22:53:17,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2256, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2595, PETRI_PLACES=120, PETRI_TRANSITIONS=194} [2024-06-27 22:53:17,410 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 57 predicate places. [2024-06-27 22:53:17,410 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 194 transitions, 2595 flow [2024-06-27 22:53:17,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:17,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:17,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:53:17,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 22:53:17,412 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:17,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:17,412 INFO L85 PathProgramCache]: Analyzing trace with hash 136576890, now seen corresponding path program 1 times [2024-06-27 22:53:17,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:17,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872670933] [2024-06-27 22:53:17,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:17,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:53:17,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:17,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872670933] [2024-06-27 22:53:17,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872670933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:17,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:17,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 22:53:17,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746129225] [2024-06-27 22:53:17,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:17,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 22:53:17,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:17,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 22:53:17,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 22:53:17,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-06-27 22:53:17,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 194 transitions, 2595 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:17,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:17,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-06-27 22:53:17,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:19,400 INFO L124 PetriNetUnfolderBase]: 7544/12475 cut-off events. [2024-06-27 22:53:19,400 INFO L125 PetriNetUnfolderBase]: For 112008/112691 co-relation queries the response was YES. [2024-06-27 22:53:19,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58973 conditions, 12475 events. 7544/12475 cut-off events. For 112008/112691 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 94699 event pairs, 2844 based on Foata normal form. 353/12565 useless extension candidates. Maximal degree in co-relation 58920. Up to 9810 conditions per place. [2024-06-27 22:53:19,539 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 169 selfloop transitions, 23 changer transitions 0/236 dead transitions. [2024-06-27 22:53:19,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 236 transitions, 3267 flow [2024-06-27 22:53:19,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:53:19,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:53:19,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 154 transitions. [2024-06-27 22:53:19,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6754385964912281 [2024-06-27 22:53:19,541 INFO L175 Difference]: Start difference. First operand has 120 places, 194 transitions, 2595 flow. Second operand 4 states and 154 transitions. [2024-06-27 22:53:19,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 236 transitions, 3267 flow [2024-06-27 22:53:19,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 236 transitions, 3159 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 22:53:19,965 INFO L231 Difference]: Finished difference. Result has 123 places, 207 transitions, 2746 flow [2024-06-27 22:53:19,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2493, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2746, PETRI_PLACES=123, PETRI_TRANSITIONS=207} [2024-06-27 22:53:19,966 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 60 predicate places. [2024-06-27 22:53:19,966 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 207 transitions, 2746 flow [2024-06-27 22:53:19,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:19,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:19,967 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] [2024-06-27 22:53:19,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 22:53:19,967 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:19,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:19,967 INFO L85 PathProgramCache]: Analyzing trace with hash -710307525, now seen corresponding path program 1 times [2024-06-27 22:53:19,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:19,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592922152] [2024-06-27 22:53:19,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:19,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:53:20,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:20,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592922152] [2024-06-27 22:53:20,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592922152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:20,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:20,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:53:20,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23259256] [2024-06-27 22:53:20,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:20,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:53:20,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:20,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:53:20,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:53:20,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:20,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 207 transitions, 2746 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:20,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:20,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:20,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:22,302 INFO L124 PetriNetUnfolderBase]: 8848/13749 cut-off events. [2024-06-27 22:53:22,303 INFO L125 PetriNetUnfolderBase]: For 122881/122885 co-relation queries the response was YES. [2024-06-27 22:53:22,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67762 conditions, 13749 events. 8848/13749 cut-off events. For 122881/122885 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 96237 event pairs, 1916 based on Foata normal form. 9/13679 useless extension candidates. Maximal degree in co-relation 67707. Up to 10220 conditions per place. [2024-06-27 22:53:22,403 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 170 selfloop transitions, 75 changer transitions 0/259 dead transitions. [2024-06-27 22:53:22,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 259 transitions, 3488 flow [2024-06-27 22:53:22,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:53:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:53:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 188 transitions. [2024-06-27 22:53:22,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6596491228070176 [2024-06-27 22:53:22,404 INFO L175 Difference]: Start difference. First operand has 123 places, 207 transitions, 2746 flow. Second operand 5 states and 188 transitions. [2024-06-27 22:53:22,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 259 transitions, 3488 flow [2024-06-27 22:53:22,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 259 transitions, 3466 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-06-27 22:53:22,722 INFO L231 Difference]: Finished difference. Result has 128 places, 214 transitions, 2997 flow [2024-06-27 22:53:22,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2724, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2997, PETRI_PLACES=128, PETRI_TRANSITIONS=214} [2024-06-27 22:53:22,722 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 65 predicate places. [2024-06-27 22:53:22,723 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 214 transitions, 2997 flow [2024-06-27 22:53:22,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:22,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:22,723 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] [2024-06-27 22:53:22,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 22:53:22,724 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:22,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:22,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1875645317, now seen corresponding path program 2 times [2024-06-27 22:53:22,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:22,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386245505] [2024-06-27 22:53:22,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:22,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:53:23,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:23,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386245505] [2024-06-27 22:53:23,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386245505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:23,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:23,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:53:23,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689631961] [2024-06-27 22:53:23,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:23,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:53:23,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:23,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:53:23,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:53:23,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:23,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 214 transitions, 2997 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:23,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:23,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:23,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:25,029 INFO L124 PetriNetUnfolderBase]: 9436/14969 cut-off events. [2024-06-27 22:53:25,030 INFO L125 PetriNetUnfolderBase]: For 146457/146461 co-relation queries the response was YES. [2024-06-27 22:53:25,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75141 conditions, 14969 events. 9436/14969 cut-off events. For 146457/146461 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 111054 event pairs, 1267 based on Foata normal form. 25/14823 useless extension candidates. Maximal degree in co-relation 75083. Up to 7633 conditions per place. [2024-06-27 22:53:25,212 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 201 selfloop transitions, 76 changer transitions 0/291 dead transitions. [2024-06-27 22:53:25,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 291 transitions, 4082 flow [2024-06-27 22:53:25,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:53:25,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:53:25,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 227 transitions. [2024-06-27 22:53:25,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6637426900584795 [2024-06-27 22:53:25,213 INFO L175 Difference]: Start difference. First operand has 128 places, 214 transitions, 2997 flow. Second operand 6 states and 227 transitions. [2024-06-27 22:53:25,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 291 transitions, 4082 flow [2024-06-27 22:53:25,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 291 transitions, 3913 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 22:53:25,758 INFO L231 Difference]: Finished difference. Result has 132 places, 217 transitions, 3108 flow [2024-06-27 22:53:25,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2828, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3108, PETRI_PLACES=132, PETRI_TRANSITIONS=217} [2024-06-27 22:53:25,759 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 69 predicate places. [2024-06-27 22:53:25,759 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 217 transitions, 3108 flow [2024-06-27 22:53:25,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:25,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:25,760 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] [2024-06-27 22:53:25,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 22:53:25,760 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:25,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:25,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1875376206, now seen corresponding path program 1 times [2024-06-27 22:53:25,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:25,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472686658] [2024-06-27 22:53:25,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:25,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:53:26,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:26,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472686658] [2024-06-27 22:53:26,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472686658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:26,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:26,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:53:26,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152649089] [2024-06-27 22:53:26,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:26,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:53:26,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:26,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:53:26,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:53:26,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:26,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 217 transitions, 3108 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:26,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:26,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:26,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:28,589 INFO L124 PetriNetUnfolderBase]: 11002/17691 cut-off events. [2024-06-27 22:53:28,589 INFO L125 PetriNetUnfolderBase]: For 187250/187266 co-relation queries the response was YES. [2024-06-27 22:53:28,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89359 conditions, 17691 events. 11002/17691 cut-off events. For 187250/187266 co-relation queries the response was YES. Maximal size of possible extension queue 1009. Compared 136769 event pairs, 2770 based on Foata normal form. 46/17526 useless extension candidates. Maximal degree in co-relation 89299. Up to 8461 conditions per place. [2024-06-27 22:53:28,750 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 262 selfloop transitions, 61 changer transitions 0/337 dead transitions. [2024-06-27 22:53:28,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 337 transitions, 4893 flow [2024-06-27 22:53:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:53:28,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:53:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 241 transitions. [2024-06-27 22:53:28,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7046783625730995 [2024-06-27 22:53:28,752 INFO L175 Difference]: Start difference. First operand has 132 places, 217 transitions, 3108 flow. Second operand 6 states and 241 transitions. [2024-06-27 22:53:28,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 337 transitions, 4893 flow [2024-06-27 22:53:29,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 337 transitions, 4782 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 22:53:29,353 INFO L231 Difference]: Finished difference. Result has 139 places, 236 transitions, 3587 flow [2024-06-27 22:53:29,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=3020, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3587, PETRI_PLACES=139, PETRI_TRANSITIONS=236} [2024-06-27 22:53:29,353 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 76 predicate places. [2024-06-27 22:53:29,354 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 236 transitions, 3587 flow [2024-06-27 22:53:29,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:29,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:29,354 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] [2024-06-27 22:53:29,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 22:53:29,354 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:29,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:29,355 INFO L85 PathProgramCache]: Analyzing trace with hash -834128929, now seen corresponding path program 3 times [2024-06-27 22:53:29,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:29,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022242995] [2024-06-27 22:53:29,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:29,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:29,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:53:29,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:29,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022242995] [2024-06-27 22:53:29,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022242995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:29,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:29,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:53:29,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726981165] [2024-06-27 22:53:29,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:29,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:53:29,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:29,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:53:29,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:53:29,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:29,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 236 transitions, 3587 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:29,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:29,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:29,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:32,425 INFO L124 PetriNetUnfolderBase]: 11342/18175 cut-off events. [2024-06-27 22:53:32,425 INFO L125 PetriNetUnfolderBase]: For 220780/220784 co-relation queries the response was YES. [2024-06-27 22:53:32,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97839 conditions, 18175 events. 11342/18175 cut-off events. For 220780/220784 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 140279 event pairs, 1550 based on Foata normal form. 25/17939 useless extension candidates. Maximal degree in co-relation 97775. Up to 9731 conditions per place. [2024-06-27 22:53:32,587 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 215 selfloop transitions, 82 changer transitions 0/311 dead transitions. [2024-06-27 22:53:32,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 311 transitions, 4778 flow [2024-06-27 22:53:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:53:32,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:53:32,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 224 transitions. [2024-06-27 22:53:32,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6549707602339181 [2024-06-27 22:53:32,589 INFO L175 Difference]: Start difference. First operand has 139 places, 236 transitions, 3587 flow. Second operand 6 states and 224 transitions. [2024-06-27 22:53:32,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 311 transitions, 4778 flow [2024-06-27 22:53:33,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 311 transitions, 4615 flow, removed 67 selfloop flow, removed 2 redundant places. [2024-06-27 22:53:33,280 INFO L231 Difference]: Finished difference. Result has 143 places, 237 transitions, 3663 flow [2024-06-27 22:53:33,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=3465, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3663, PETRI_PLACES=143, PETRI_TRANSITIONS=237} [2024-06-27 22:53:33,281 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 80 predicate places. [2024-06-27 22:53:33,281 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 237 transitions, 3663 flow [2024-06-27 22:53:33,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:33,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:33,282 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] [2024-06-27 22:53:33,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 22:53:33,282 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:33,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:33,283 INFO L85 PathProgramCache]: Analyzing trace with hash -247557573, now seen corresponding path program 4 times [2024-06-27 22:53:33,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:33,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402456026] [2024-06-27 22:53:33,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:33,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:53:33,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:33,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402456026] [2024-06-27 22:53:33,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402456026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:33,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:33,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:53:33,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659117442] [2024-06-27 22:53:33,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:33,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:53:33,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:33,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:53:33,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:53:33,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:33,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 237 transitions, 3663 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:33,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:33,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:33,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:36,431 INFO L124 PetriNetUnfolderBase]: 11542/18589 cut-off events. [2024-06-27 22:53:36,431 INFO L125 PetriNetUnfolderBase]: For 227189/227207 co-relation queries the response was YES. [2024-06-27 22:53:36,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96916 conditions, 18589 events. 11542/18589 cut-off events. For 227189/227207 co-relation queries the response was YES. Maximal size of possible extension queue 1053. Compared 143799 event pairs, 3102 based on Foata normal form. 17/18367 useless extension candidates. Maximal degree in co-relation 96851. Up to 14659 conditions per place. [2024-06-27 22:53:36,661 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 211 selfloop transitions, 67 changer transitions 0/292 dead transitions. [2024-06-27 22:53:36,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 292 transitions, 4556 flow [2024-06-27 22:53:36,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:53:36,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:53:36,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 189 transitions. [2024-06-27 22:53:36,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6631578947368421 [2024-06-27 22:53:36,663 INFO L175 Difference]: Start difference. First operand has 143 places, 237 transitions, 3663 flow. Second operand 5 states and 189 transitions. [2024-06-27 22:53:36,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 292 transitions, 4556 flow [2024-06-27 22:53:37,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 292 transitions, 4405 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 22:53:37,633 INFO L231 Difference]: Finished difference. Result has 147 places, 249 transitions, 3965 flow [2024-06-27 22:53:37,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=3519, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3965, PETRI_PLACES=147, PETRI_TRANSITIONS=249} [2024-06-27 22:53:37,633 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 84 predicate places. [2024-06-27 22:53:37,634 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 249 transitions, 3965 flow [2024-06-27 22:53:37,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:37,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:37,634 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] [2024-06-27 22:53:37,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 22:53:37,634 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:37,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:37,634 INFO L85 PathProgramCache]: Analyzing trace with hash 986755032, now seen corresponding path program 2 times [2024-06-27 22:53:37,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:37,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137193578] [2024-06-27 22:53:37,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:37,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:37,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:53:38,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:38,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137193578] [2024-06-27 22:53:38,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137193578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:38,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:38,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:53:38,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104487408] [2024-06-27 22:53:38,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:38,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:53:38,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:38,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:53:38,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:53:38,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:38,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 249 transitions, 3965 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:38,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:38,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:38,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:41,627 INFO L124 PetriNetUnfolderBase]: 11506/18505 cut-off events. [2024-06-27 22:53:41,628 INFO L125 PetriNetUnfolderBase]: For 232253/232269 co-relation queries the response was YES. [2024-06-27 22:53:41,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96945 conditions, 18505 events. 11506/18505 cut-off events. For 232253/232269 co-relation queries the response was YES. Maximal size of possible extension queue 1053. Compared 142981 event pairs, 2672 based on Foata normal form. 22/18315 useless extension candidates. Maximal degree in co-relation 96878. Up to 13953 conditions per place. [2024-06-27 22:53:41,806 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 247 selfloop transitions, 79 changer transitions 0/340 dead transitions. [2024-06-27 22:53:41,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 340 transitions, 5340 flow [2024-06-27 22:53:41,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:53:41,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:53:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 230 transitions. [2024-06-27 22:53:41,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.672514619883041 [2024-06-27 22:53:41,807 INFO L175 Difference]: Start difference. First operand has 147 places, 249 transitions, 3965 flow. Second operand 6 states and 230 transitions. [2024-06-27 22:53:41,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 340 transitions, 5340 flow [2024-06-27 22:53:42,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 340 transitions, 5219 flow, removed 34 selfloop flow, removed 1 redundant places. [2024-06-27 22:53:42,787 INFO L231 Difference]: Finished difference. Result has 155 places, 263 transitions, 4425 flow [2024-06-27 22:53:42,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=3844, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4425, PETRI_PLACES=155, PETRI_TRANSITIONS=263} [2024-06-27 22:53:42,788 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 92 predicate places. [2024-06-27 22:53:42,788 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 263 transitions, 4425 flow [2024-06-27 22:53:42,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:42,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:42,788 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] [2024-06-27 22:53:42,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 22:53:42,789 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:42,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:42,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1969956963, now seen corresponding path program 5 times [2024-06-27 22:53:42,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:42,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048566673] [2024-06-27 22:53:42,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:42,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:53:43,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:43,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048566673] [2024-06-27 22:53:43,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048566673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:43,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:43,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:53:43,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668036739] [2024-06-27 22:53:43,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:43,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:53:43,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:43,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:53:43,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:53:43,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:43,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 263 transitions, 4425 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:43,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:43,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:43,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:46,476 INFO L124 PetriNetUnfolderBase]: 11814/18953 cut-off events. [2024-06-27 22:53:46,476 INFO L125 PetriNetUnfolderBase]: For 268095/268099 co-relation queries the response was YES. [2024-06-27 22:53:46,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101047 conditions, 18953 events. 11814/18953 cut-off events. For 268095/268099 co-relation queries the response was YES. Maximal size of possible extension queue 1085. Compared 146801 event pairs, 1804 based on Foata normal form. 25/18809 useless extension candidates. Maximal degree in co-relation 100975. Up to 12776 conditions per place. [2024-06-27 22:53:46,687 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 230 selfloop transitions, 95 changer transitions 0/339 dead transitions. [2024-06-27 22:53:46,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 339 transitions, 5749 flow [2024-06-27 22:53:46,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:53:46,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:53:46,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 232 transitions. [2024-06-27 22:53:46,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6783625730994152 [2024-06-27 22:53:46,689 INFO L175 Difference]: Start difference. First operand has 155 places, 263 transitions, 4425 flow. Second operand 6 states and 232 transitions. [2024-06-27 22:53:46,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 339 transitions, 5749 flow [2024-06-27 22:53:47,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 339 transitions, 5733 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-27 22:53:47,640 INFO L231 Difference]: Finished difference. Result has 162 places, 276 transitions, 4977 flow [2024-06-27 22:53:47,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=4411, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4977, PETRI_PLACES=162, PETRI_TRANSITIONS=276} [2024-06-27 22:53:47,641 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 99 predicate places. [2024-06-27 22:53:47,641 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 276 transitions, 4977 flow [2024-06-27 22:53:47,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:47,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:47,641 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] [2024-06-27 22:53:47,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 22:53:47,642 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:47,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:47,642 INFO L85 PathProgramCache]: Analyzing trace with hash -61081583, now seen corresponding path program 1 times [2024-06-27 22:53:47,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:47,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857254145] [2024-06-27 22:53:47,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:47,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:53:47,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:47,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857254145] [2024-06-27 22:53:47,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857254145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:47,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:47,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:53:47,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778453763] [2024-06-27 22:53:47,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:47,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:53:47,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:47,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:53:47,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:53:47,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-06-27 22:53:47,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 276 transitions, 4977 flow. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:47,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:47,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-06-27 22:53:47,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:51,183 INFO L124 PetriNetUnfolderBase]: 10267/17272 cut-off events. [2024-06-27 22:53:51,183 INFO L125 PetriNetUnfolderBase]: For 276255/277670 co-relation queries the response was YES. [2024-06-27 22:53:51,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92462 conditions, 17272 events. 10267/17272 cut-off events. For 276255/277670 co-relation queries the response was YES. Maximal size of possible extension queue 1075. Compared 141255 event pairs, 3856 based on Foata normal form. 820/17707 useless extension candidates. Maximal degree in co-relation 92386. Up to 13590 conditions per place. [2024-06-27 22:53:51,400 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 223 selfloop transitions, 27 changer transitions 0/308 dead transitions. [2024-06-27 22:53:51,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 308 transitions, 5621 flow [2024-06-27 22:53:51,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:53:51,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:53:51,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 154 transitions. [2024-06-27 22:53:51,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6754385964912281 [2024-06-27 22:53:51,402 INFO L175 Difference]: Start difference. First operand has 162 places, 276 transitions, 4977 flow. Second operand 4 states and 154 transitions. [2024-06-27 22:53:51,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 308 transitions, 5621 flow [2024-06-27 22:53:52,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 308 transitions, 5553 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-27 22:53:52,308 INFO L231 Difference]: Finished difference. Result has 165 places, 281 transitions, 5055 flow [2024-06-27 22:53:52,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=4909, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5055, PETRI_PLACES=165, PETRI_TRANSITIONS=281} [2024-06-27 22:53:52,309 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 102 predicate places. [2024-06-27 22:53:52,309 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 281 transitions, 5055 flow [2024-06-27 22:53:52,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:52,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:52,309 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] [2024-06-27 22:53:52,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 22:53:52,309 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:52,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:52,310 INFO L85 PathProgramCache]: Analyzing trace with hash -544694378, now seen corresponding path program 1 times [2024-06-27 22:53:52,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:52,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263863581] [2024-06-27 22:53:52,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:52,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:53:52,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:52,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263863581] [2024-06-27 22:53:52,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263863581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:52,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:52,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 22:53:52,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184072383] [2024-06-27 22:53:52,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:52,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 22:53:52,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:52,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 22:53:52,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 22:53:52,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:52,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 281 transitions, 5055 flow. Second operand has 8 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:52,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:52,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:52,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand