./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_power.oepc.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_power.oepc.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_power.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe027_power.oepc.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 22:52:31,181 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 22:52:31,260 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 22:52:31,264 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 22:52:31,265 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 22:52:31,290 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 22:52:31,291 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 22:52:31,291 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 22:52:31,292 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 22:52:31,296 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 22:52:31,296 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 22:52:31,297 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 22:52:31,297 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 22:52:31,299 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 22:52:31,299 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 22:52:31,299 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 22:52:31,299 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 22:52:31,299 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 22:52:31,300 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 22:52:31,300 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 22:52:31,300 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 22:52:31,300 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 22:52:31,301 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 22:52:31,301 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 22:52:31,301 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 22:52:31,301 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 22:52:31,301 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 22:52:31,302 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 22:52:31,302 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 22:52:31,302 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 22:52:31,303 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 22:52:31,303 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 22:52:31,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 22:52:31,304 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 22:52:31,304 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 22:52:31,304 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 22:52:31,304 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 22:52:31,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 22:52:31,305 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 22:52:31,305 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 22:52:31,305 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 22:52:31,305 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 22:52:31,305 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 22:52:31,306 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 22:52:31,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 22:52:31,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 22:52:31,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 22:52:31,548 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 22:52:31,549 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 22:52:31,550 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_power.oepc.i [2024-06-27 22:52:32,527 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 22:52:32,737 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 22:52:32,737 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_power.oepc.i [2024-06-27 22:52:32,755 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a61e9f63/c89e8f5a7cd549beba7ef4907abfa514/FLAG9a2f2c049 [2024-06-27 22:52:32,767 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a61e9f63/c89e8f5a7cd549beba7ef4907abfa514 [2024-06-27 22:52:32,769 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 22:52:32,769 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 22:52:32,769 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe027_power.oepc.yml/witness.yml [2024-06-27 22:52:32,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 22:52:32,821 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 22:52:32,821 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 22:52:32,822 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 22:52:32,825 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 22:52:32,825 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 10:52:32" (1/2) ... [2024-06-27 22:52:32,826 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bd64b86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:52:32, skipping insertion in model container [2024-06-27 22:52:32,826 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 10:52:32" (1/2) ... [2024-06-27 22:52:32,827 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4f70c993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 10:52:32, skipping insertion in model container [2024-06-27 22:52:32,827 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 10:52:32" (2/2) ... [2024-06-27 22:52:32,828 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bd64b86 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:52:32, skipping insertion in model container [2024-06-27 22:52:32,828 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 10:52:32" (2/2) ... [2024-06-27 22:52:32,828 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 22:52:32,852 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 22:52:32,854 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] ! 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 22:52:32,854 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] ! 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 22:52:32,854 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 22:52:32,854 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] ! 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 22:52:32,854 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 22:52:32,855 INFO L106 edCorrectnessWitness]: ghost_update [L865-L865] multithreaded = 1; [2024-06-27 22:52:32,886 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 22:52:33,019 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_power.oepc.i[995,1008] [2024-06-27 22:52:33,226 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 22:52:33,235 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 22:52:33,260 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_power.oepc.i[995,1008] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 22:52:33,317 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 22:52:33,371 INFO L206 MainTranslator]: Completed translation [2024-06-27 22:52:33,372 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 10:52:33 WrapperNode [2024-06-27 22:52:33,372 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 22:52:33,373 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 22:52:33,373 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 22:52:33,374 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 22:52:33,379 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 10:52:33" (1/1) ... [2024-06-27 22:52:33,409 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 10:52:33" (1/1) ... [2024-06-27 22:52:33,445 INFO L138 Inliner]: procedures = 176, calls = 76, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 172 [2024-06-27 22:52:33,445 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 22:52:33,446 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 22:52:33,446 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 22:52:33,446 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 22:52:33,455 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 10:52:33" (1/1) ... [2024-06-27 22:52:33,455 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 10:52:33" (1/1) ... [2024-06-27 22:52:33,468 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 10:52:33" (1/1) ... [2024-06-27 22:52:33,499 INFO L175 MemorySlicer]: Split 31 memory accesses to 2 slices as follows [2, 29]. 94 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 22:52:33,500 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 10:52:33" (1/1) ... [2024-06-27 22:52:33,501 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 10:52:33" (1/1) ... [2024-06-27 22:52:33,507 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 10:52:33" (1/1) ... [2024-06-27 22:52:33,518 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 10:52:33" (1/1) ... [2024-06-27 22:52:33,521 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 10:52:33" (1/1) ... [2024-06-27 22:52:33,529 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 10:52:33" (1/1) ... [2024-06-27 22:52:33,533 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 22:52:33,536 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 22:52:33,537 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 22:52:33,537 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 22:52:33,538 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 10:52:33" (1/1) ... [2024-06-27 22:52:33,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 22:52:33,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 22:52:33,569 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 22:52:33,585 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 22:52:33,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 22:52:33,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 22:52:33,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 22:52:33,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 22:52:33,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 22:52:33,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 22:52:33,604 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 22:52:33,605 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 22:52:33,605 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 22:52:33,605 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 22:52:33,605 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 22:52:33,606 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 22:52:33,606 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 22:52:33,606 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 22:52:33,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 22:52:33,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 22:52:33,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 22:52:33,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 22:52:33,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 22:52:33,609 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 22:52:33,737 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 22:52:33,738 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 22:52:34,070 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 22:52:34,070 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 22:52:34,366 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 22:52:34,366 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 22:52:34,367 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 10:52:34 BoogieIcfgContainer [2024-06-27 22:52:34,367 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 22:52:34,369 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 22:52:34,369 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 22:52:34,371 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 22:52:34,372 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 10:52:32" (1/4) ... [2024-06-27 22:52:34,372 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cdb4c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 10:52:34, skipping insertion in model container [2024-06-27 22:52:34,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 10:52:32" (2/4) ... [2024-06-27 22:52:34,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cdb4c9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 10:52:34, skipping insertion in model container [2024-06-27 22:52:34,374 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 10:52:33" (3/4) ... [2024-06-27 22:52:34,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cdb4c9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 10:52:34, skipping insertion in model container [2024-06-27 22:52:34,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 10:52:34" (4/4) ... [2024-06-27 22:52:34,375 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_power.oepc.i [2024-06-27 22:52:34,389 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 22:52:34,390 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 22:52:34,390 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 22:52:34,438 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 22:52:34,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 57 transitions, 130 flow [2024-06-27 22:52:34,510 INFO L124 PetriNetUnfolderBase]: 1/53 cut-off events. [2024-06-27 22:52:34,510 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 22:52:34,512 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 22:52:34,513 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 57 transitions, 130 flow [2024-06-27 22:52:34,515 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 50 transitions, 112 flow [2024-06-27 22:52:34,527 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 22:52:34,532 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;@73b6d13b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 22:52:34,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 22:52:34,541 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 22:52:34,542 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 22:52:34,542 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 22:52:34,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:52:34,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 22:52:34,543 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 22:52:34,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:52:34,547 INFO L85 PathProgramCache]: Analyzing trace with hash 710751495, now seen corresponding path program 1 times [2024-06-27 22:52:34,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:52:34,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93174001] [2024-06-27 22:52:34,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:52:34,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:52:34,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:52:34,966 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 22:52:34,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:52:34,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93174001] [2024-06-27 22:52:34,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93174001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:52:34,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:52:34,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 22:52:34,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677471165] [2024-06-27 22:52:34,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:52:34,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 22:52:34,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:52:35,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 22:52:35,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 22:52:35,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-06-27 22:52:35,037 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 22:52:35,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:52:35,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-06-27 22:52:35,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:52:35,932 INFO L124 PetriNetUnfolderBase]: 2896/4720 cut-off events. [2024-06-27 22:52:35,932 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-06-27 22:52:35,942 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 31309 event pairs, 1821 based on Foata normal form. 0/4474 useless extension candidates. Maximal degree in co-relation 8853. Up to 4043 conditions per place. [2024-06-27 22:52:35,967 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 49 selfloop transitions, 6 changer transitions 0/71 dead transitions. [2024-06-27 22:52:35,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 71 transitions, 273 flow [2024-06-27 22:52:35,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 22:52:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 22:52:35,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2024-06-27 22:52:35,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7134502923976608 [2024-06-27 22:52:35,978 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 112 flow. Second operand 3 states and 122 transitions. [2024-06-27 22:52:35,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 71 transitions, 273 flow [2024-06-27 22:52:35,980 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 22:52:35,982 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 154 flow [2024-06-27 22:52:35,984 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 22:52:35,986 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -1 predicate places. [2024-06-27 22:52:35,987 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 154 flow [2024-06-27 22:52:35,987 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 22:52:35,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:52:35,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:52:35,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 22:52:35,988 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 22:52:35,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:52:35,988 INFO L85 PathProgramCache]: Analyzing trace with hash 132428902, now seen corresponding path program 1 times [2024-06-27 22:52:35,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:52:35,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958624151] [2024-06-27 22:52:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:52:35,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:52:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:52:36,395 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 22:52:36,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:52:36,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958624151] [2024-06-27 22:52:36,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958624151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:52:36,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:52:36,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 22:52:36,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117626698] [2024-06-27 22:52:36,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:52:36,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 22:52:36,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:52:36,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 22:52:36,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 22:52:36,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-06-27 22:52:36,409 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 22:52:36,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:52:36,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-06-27 22:52:36,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:52:37,132 INFO L124 PetriNetUnfolderBase]: 2848/4590 cut-off events. [2024-06-27 22:52:37,132 INFO L125 PetriNetUnfolderBase]: For 1022/1034 co-relation queries the response was YES. [2024-06-27 22:52:37,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10284 conditions, 4590 events. 2848/4590 cut-off events. For 1022/1034 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 30769 event pairs, 1211 based on Foata normal form. 22/4522 useless extension candidates. Maximal degree in co-relation 10272. Up to 3771 conditions per place. [2024-06-27 22:52:37,183 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 50 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2024-06-27 22:52:37,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 73 transitions, 316 flow [2024-06-27 22:52:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 22:52:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 22:52:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2024-06-27 22:52:37,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.695906432748538 [2024-06-27 22:52:37,196 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 154 flow. Second operand 3 states and 119 transitions. [2024-06-27 22:52:37,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 73 transitions, 316 flow [2024-06-27 22:52:37,197 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 22:52:37,198 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 189 flow [2024-06-27 22:52:37,198 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 22:52:37,199 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2024-06-27 22:52:37,199 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 189 flow [2024-06-27 22:52:37,199 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 22:52:37,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:52:37,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:52:37,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 22:52:37,200 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 22:52:37,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:52:37,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1838068335, now seen corresponding path program 1 times [2024-06-27 22:52:37,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:52:37,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602465132] [2024-06-27 22:52:37,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:52:37,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:52:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:52:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:52:37,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:52:37,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602465132] [2024-06-27 22:52:37,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602465132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:52:37,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:52:37,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 22:52:37,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953313018] [2024-06-27 22:52:37,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:52:37,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 22:52:37,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:52:37,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 22:52:37,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 22:52:37,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:52:37,306 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 22:52:37,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:52:37,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:52:37,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:52:38,313 INFO L124 PetriNetUnfolderBase]: 5348/8382 cut-off events. [2024-06-27 22:52:38,313 INFO L125 PetriNetUnfolderBase]: For 3486/3486 co-relation queries the response was YES. [2024-06-27 22:52:38,325 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 55824 event pairs, 3027 based on Foata normal form. 6/8306 useless extension candidates. Maximal degree in co-relation 20004. Up to 7284 conditions per place. [2024-06-27 22:52:38,365 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 71 selfloop transitions, 10 changer transitions 0/95 dead transitions. [2024-06-27 22:52:38,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 95 transitions, 464 flow [2024-06-27 22:52:38,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:52:38,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:52:38,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-06-27 22:52:38,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 22:52:38,369 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 189 flow. Second operand 4 states and 152 transitions. [2024-06-27 22:52:38,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 95 transitions, 464 flow [2024-06-27 22:52:38,372 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 22:52:38,374 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 277 flow [2024-06-27 22:52:38,374 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 22:52:38,375 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2024-06-27 22:52:38,375 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 277 flow [2024-06-27 22:52:38,375 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 22:52:38,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:52:38,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:52:38,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 22:52:38,376 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 22:52:38,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:52:38,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1521116542, now seen corresponding path program 1 times [2024-06-27 22:52:38,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:52:38,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507823897] [2024-06-27 22:52:38,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:52:38,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:52:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:52:38,708 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 22:52:38,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:52:38,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507823897] [2024-06-27 22:52:38,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507823897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:52:38,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:52:38,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:52:38,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058168962] [2024-06-27 22:52:38,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:52:38,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:52:38,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:52:38,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:52:38,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:52:38,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:52:38,714 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 22:52:38,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:52:38,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:52:38,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:52:39,808 INFO L124 PetriNetUnfolderBase]: 5333/8362 cut-off events. [2024-06-27 22:52:39,808 INFO L125 PetriNetUnfolderBase]: For 6229/6229 co-relation queries the response was YES. [2024-06-27 22:52:39,824 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 55854 event pairs, 2273 based on Foata normal form. 6/8286 useless extension candidates. Maximal degree in co-relation 21510. Up to 7154 conditions per place. [2024-06-27 22:52:39,862 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 73 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2024-06-27 22:52:39,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 104 transitions, 571 flow [2024-06-27 22:52:39,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:52:39,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:52:39,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 154 transitions. [2024-06-27 22:52:39,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6754385964912281 [2024-06-27 22:52:39,864 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 277 flow. Second operand 4 states and 154 transitions. [2024-06-27 22:52:39,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 104 transitions, 571 flow [2024-06-27 22:52:39,867 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 22:52:39,868 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 386 flow [2024-06-27 22:52:39,869 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 22:52:39,869 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2024-06-27 22:52:39,869 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 386 flow [2024-06-27 22:52:39,870 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 22:52:39,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:52:39,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:52:39,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 22:52:39,870 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 22:52:39,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:52:39,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1903642524, now seen corresponding path program 1 times [2024-06-27 22:52:39,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:52:39,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921529851] [2024-06-27 22:52:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:52:39,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:52:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:52:40,076 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 22:52:40,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:52:40,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921529851] [2024-06-27 22:52:40,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921529851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:52:40,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:52:40,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:52:40,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387278666] [2024-06-27 22:52:40,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:52:40,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:52:40,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:52:40,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:52:40,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:52:40,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 57 [2024-06-27 22:52:40,084 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 22:52:40,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:52:40,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 57 [2024-06-27 22:52:40,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:52:41,555 INFO L124 PetriNetUnfolderBase]: 7185/11286 cut-off events. [2024-06-27 22:52:41,555 INFO L125 PetriNetUnfolderBase]: For 13757/13765 co-relation queries the response was YES. [2024-06-27 22:52:41,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31868 conditions, 11286 events. 7185/11286 cut-off events. For 13757/13765 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 78231 event pairs, 1745 based on Foata normal form. 40/11260 useless extension candidates. Maximal degree in co-relation 31846. Up to 7780 conditions per place. [2024-06-27 22:52:41,620 INFO L140 encePairwiseOnDemand]: 40/57 looper letters, 144 selfloop transitions, 44 changer transitions 0/201 dead transitions. [2024-06-27 22:52:41,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 201 transitions, 1236 flow [2024-06-27 22:52:41,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 22:52:41,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 22:52:41,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 304 transitions. [2024-06-27 22:52:41,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 22:52:41,622 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 386 flow. Second operand 8 states and 304 transitions. [2024-06-27 22:52:41,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 201 transitions, 1236 flow [2024-06-27 22:52:41,634 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 22:52:41,636 INFO L231 Difference]: Finished difference. Result has 83 places, 109 transitions, 772 flow [2024-06-27 22:52:41,637 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 22:52:41,637 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 20 predicate places. [2024-06-27 22:52:41,637 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 109 transitions, 772 flow [2024-06-27 22:52:41,638 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 22:52:41,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:52:41,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:52:41,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 22:52:41,638 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 22:52:41,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:52:41,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1361101348, now seen corresponding path program 2 times [2024-06-27 22:52:41,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:52:41,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926425845] [2024-06-27 22:52:41,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:52:41,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:52:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:52:41,944 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 22:52:41,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:52:41,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926425845] [2024-06-27 22:52:41,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926425845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:52:41,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:52:41,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:52:41,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591223954] [2024-06-27 22:52:41,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:52:41,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:52:41,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:52:41,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:52:41,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:52:41,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:52:41,950 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 22:52:41,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:52:41,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:52:41,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:52:43,416 INFO L124 PetriNetUnfolderBase]: 7894/12415 cut-off events. [2024-06-27 22:52:43,416 INFO L125 PetriNetUnfolderBase]: For 29090/29096 co-relation queries the response was YES. [2024-06-27 22:52:43,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42117 conditions, 12415 events. 7894/12415 cut-off events. For 29090/29096 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 87113 event pairs, 1458 based on Foata normal form. 61/12346 useless extension candidates. Maximal degree in co-relation 42089. Up to 9114 conditions per place. [2024-06-27 22:52:43,497 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 106 selfloop transitions, 39 changer transitions 0/159 dead transitions. [2024-06-27 22:52:43,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 159 transitions, 1298 flow [2024-06-27 22:52:43,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:52:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:52:43,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 156 transitions. [2024-06-27 22:52:43,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6842105263157895 [2024-06-27 22:52:43,498 INFO L175 Difference]: Start difference. First operand has 83 places, 109 transitions, 772 flow. Second operand 4 states and 156 transitions. [2024-06-27 22:52:43,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 159 transitions, 1298 flow [2024-06-27 22:52:43,532 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 22:52:43,534 INFO L231 Difference]: Finished difference. Result has 85 places, 122 transitions, 990 flow [2024-06-27 22:52:43,534 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 22:52:43,535 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 22 predicate places. [2024-06-27 22:52:43,535 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 122 transitions, 990 flow [2024-06-27 22:52:43,535 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 22:52:43,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:52:43,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 22:52:43,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 22:52:43,536 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 22:52:43,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:52:43,536 INFO L85 PathProgramCache]: Analyzing trace with hash 510370310, now seen corresponding path program 3 times [2024-06-27 22:52:43,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:52:43,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56987837] [2024-06-27 22:52:43,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:52:43,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:52:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:52:43,812 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 22:52:43,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:52:43,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56987837] [2024-06-27 22:52:43,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56987837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:52:43,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:52:43,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:52:43,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514304087] [2024-06-27 22:52:43,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:52:43,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:52:43,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:52:43,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:52:43,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:52:43,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:52:43,819 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 22:52:43,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:52:43,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:52:43,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:52:45,460 INFO L124 PetriNetUnfolderBase]: 7870/12466 cut-off events. [2024-06-27 22:52:45,460 INFO L125 PetriNetUnfolderBase]: For 37583/37589 co-relation queries the response was YES. [2024-06-27 22:52:45,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46358 conditions, 12466 events. 7870/12466 cut-off events. For 37583/37589 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 88242 event pairs, 1561 based on Foata normal form. 13/12311 useless extension candidates. Maximal degree in co-relation 46329. Up to 9952 conditions per place. [2024-06-27 22:52:45,534 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 121 selfloop transitions, 40 changer transitions 0/175 dead transitions. [2024-06-27 22:52:45,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 175 transitions, 1611 flow [2024-06-27 22:52:45,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:52:45,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:52:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2024-06-27 22:52:45,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6421052631578947 [2024-06-27 22:52:45,536 INFO L175 Difference]: Start difference. First operand has 85 places, 122 transitions, 990 flow. Second operand 5 states and 183 transitions. [2024-06-27 22:52:45,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 175 transitions, 1611 flow [2024-06-27 22:52:45,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 175 transitions, 1510 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 22:52:45,577 INFO L231 Difference]: Finished difference. Result has 89 places, 136 transitions, 1236 flow [2024-06-27 22:52:45,578 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=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1236, PETRI_PLACES=89, PETRI_TRANSITIONS=136} [2024-06-27 22:52:45,579 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 26 predicate places. [2024-06-27 22:52:45,579 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 136 transitions, 1236 flow [2024-06-27 22:52:45,579 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 22:52:45,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:52:45,579 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 22:52:45,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 22:52:45,580 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 22:52:45,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:52:45,580 INFO L85 PathProgramCache]: Analyzing trace with hash 873777915, now seen corresponding path program 1 times [2024-06-27 22:52:45,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:52:45,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868793854] [2024-06-27 22:52:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:52:45,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:52:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:52:45,684 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 22:52:45,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:52:45,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868793854] [2024-06-27 22:52:45,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868793854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:52:45,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:52:45,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:52:45,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89689993] [2024-06-27 22:52:45,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:52:45,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:52:45,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:52:45,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:52:45,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:52:45,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:52:45,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 136 transitions, 1236 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 22:52:45,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:52:45,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:52:45,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:52:47,115 INFO L124 PetriNetUnfolderBase]: 7858/12427 cut-off events. [2024-06-27 22:52:47,115 INFO L125 PetriNetUnfolderBase]: For 43452/43454 co-relation queries the response was YES. [2024-06-27 22:52:47,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47468 conditions, 12427 events. 7858/12427 cut-off events. For 43452/43454 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 87457 event pairs, 2718 based on Foata normal form. 6/12256 useless extension candidates. Maximal degree in co-relation 47436. Up to 10612 conditions per place. [2024-06-27 22:52:47,197 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 145 selfloop transitions, 22 changer transitions 0/181 dead transitions. [2024-06-27 22:52:47,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 181 transitions, 1760 flow [2024-06-27 22:52:47,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:52:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:52:47,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 184 transitions. [2024-06-27 22:52:47,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6456140350877193 [2024-06-27 22:52:47,199 INFO L175 Difference]: Start difference. First operand has 89 places, 136 transitions, 1236 flow. Second operand 5 states and 184 transitions. [2024-06-27 22:52:47,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 181 transitions, 1760 flow [2024-06-27 22:52:47,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 181 transitions, 1722 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-06-27 22:52:47,277 INFO L231 Difference]: Finished difference. Result has 95 places, 144 transitions, 1365 flow [2024-06-27 22:52:47,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1365, PETRI_PLACES=95, PETRI_TRANSITIONS=144} [2024-06-27 22:52:47,278 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 32 predicate places. [2024-06-27 22:52:47,278 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 144 transitions, 1365 flow [2024-06-27 22:52:47,278 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 22:52:47,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:52:47,278 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 22:52:47,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 22:52:47,279 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 22:52:47,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:52:47,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1317313702, now seen corresponding path program 1 times [2024-06-27 22:52:47,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:52:47,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515832024] [2024-06-27 22:52:47,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:52:47,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:52:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:52:47,493 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 22:52:47,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:52:47,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515832024] [2024-06-27 22:52:47,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515832024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:52:47,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:52:47,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:52:47,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046002480] [2024-06-27 22:52:47,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:52:47,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:52:47,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:52:47,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:52:47,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:52:47,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:52:47,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 144 transitions, 1365 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 22:52:47,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:52:47,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:52:47,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:52:49,136 INFO L124 PetriNetUnfolderBase]: 8121/12864 cut-off events. [2024-06-27 22:52:49,136 INFO L125 PetriNetUnfolderBase]: For 53465/53486 co-relation queries the response was YES. [2024-06-27 22:52:49,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50903 conditions, 12864 events. 8121/12864 cut-off events. For 53465/53486 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 90910 event pairs, 2228 based on Foata normal form. 30/12741 useless extension candidates. Maximal degree in co-relation 50867. Up to 9791 conditions per place. [2024-06-27 22:52:49,229 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 162 selfloop transitions, 53 changer transitions 0/229 dead transitions. [2024-06-27 22:52:49,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 229 transitions, 2377 flow [2024-06-27 22:52:49,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:52:49,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:52:49,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 226 transitions. [2024-06-27 22:52:49,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6608187134502924 [2024-06-27 22:52:49,230 INFO L175 Difference]: Start difference. First operand has 95 places, 144 transitions, 1365 flow. Second operand 6 states and 226 transitions. [2024-06-27 22:52:49,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 229 transitions, 2377 flow [2024-06-27 22:52:49,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 229 transitions, 2302 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-27 22:52:49,341 INFO L231 Difference]: Finished difference. Result has 102 places, 165 transitions, 1775 flow [2024-06-27 22:52:49,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1775, PETRI_PLACES=102, PETRI_TRANSITIONS=165} [2024-06-27 22:52:49,343 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 39 predicate places. [2024-06-27 22:52:49,343 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 165 transitions, 1775 flow [2024-06-27 22:52:49,343 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 22:52:49,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:52:49,343 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 22:52:49,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 22:52:49,343 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 22:52:49,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:52:49,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1279636196, now seen corresponding path program 2 times [2024-06-27 22:52:49,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:52:49,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283882708] [2024-06-27 22:52:49,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:52:49,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:52:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:52:49,608 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 22:52:49,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:52:49,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283882708] [2024-06-27 22:52:49,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283882708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:52:49,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:52:49,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:52:49,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982813865] [2024-06-27 22:52:49,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:52:49,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:52:49,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:52:49,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:52:49,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:52:49,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:52:49,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 165 transitions, 1775 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 22:52:49,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:52:49,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:52:49,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:52:51,638 INFO L124 PetriNetUnfolderBase]: 8687/13760 cut-off events. [2024-06-27 22:52:51,638 INFO L125 PetriNetUnfolderBase]: For 74985/74991 co-relation queries the response was YES. [2024-06-27 22:52:51,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57902 conditions, 13760 events. 8687/13760 cut-off events. For 74985/74991 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 99604 event pairs, 1439 based on Foata normal form. 33/13649 useless extension candidates. Maximal degree in co-relation 57862. Up to 8905 conditions per place. [2024-06-27 22:52:51,762 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 166 selfloop transitions, 57 changer transitions 0/237 dead transitions. [2024-06-27 22:52:51,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 237 transitions, 2677 flow [2024-06-27 22:52:51,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:52:51,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:52:51,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 196 transitions. [2024-06-27 22:52:51,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6877192982456141 [2024-06-27 22:52:51,764 INFO L175 Difference]: Start difference. First operand has 102 places, 165 transitions, 1775 flow. Second operand 5 states and 196 transitions. [2024-06-27 22:52:51,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 237 transitions, 2677 flow [2024-06-27 22:52:51,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 237 transitions, 2647 flow, removed 15 selfloop flow, removed 0 redundant places. [2024-06-27 22:52:51,952 INFO L231 Difference]: Finished difference. Result has 109 places, 176 transitions, 2105 flow [2024-06-27 22:52:51,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2105, PETRI_PLACES=109, PETRI_TRANSITIONS=176} [2024-06-27 22:52:51,953 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 46 predicate places. [2024-06-27 22:52:51,953 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 176 transitions, 2105 flow [2024-06-27 22:52:51,953 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 22:52:51,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:52:51,954 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 22:52:51,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 22:52:51,954 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 22:52:51,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:52:51,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1549236484, now seen corresponding path program 1 times [2024-06-27 22:52:51,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:52:51,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748921331] [2024-06-27 22:52:51,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:52:51,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:52:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:52:52,214 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 22:52:52,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:52:52,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748921331] [2024-06-27 22:52:52,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748921331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:52:52,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:52:52,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:52:52,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037280255] [2024-06-27 22:52:52,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:52:52,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:52:52,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:52:52,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:52:52,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:52:52,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:52:52,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 176 transitions, 2105 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 22:52:52,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:52:52,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:52:52,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:52:54,295 INFO L124 PetriNetUnfolderBase]: 8663/13830 cut-off events. [2024-06-27 22:52:54,295 INFO L125 PetriNetUnfolderBase]: For 95096/95117 co-relation queries the response was YES. [2024-06-27 22:52:54,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63078 conditions, 13830 events. 8663/13830 cut-off events. For 95096/95117 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 100537 event pairs, 2382 based on Foata normal form. 18/13655 useless extension candidates. Maximal degree in co-relation 63033. Up to 10527 conditions per place. [2024-06-27 22:52:54,575 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 162 selfloop transitions, 53 changer transitions 0/229 dead transitions. [2024-06-27 22:52:54,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 229 transitions, 2791 flow [2024-06-27 22:52:54,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:52:54,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:52:54,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 192 transitions. [2024-06-27 22:52:54,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6736842105263158 [2024-06-27 22:52:54,576 INFO L175 Difference]: Start difference. First operand has 109 places, 176 transitions, 2105 flow. Second operand 5 states and 192 transitions. [2024-06-27 22:52:54,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 229 transitions, 2791 flow [2024-06-27 22:52:54,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 229 transitions, 2743 flow, removed 24 selfloop flow, removed 0 redundant places. [2024-06-27 22:52:54,800 INFO L231 Difference]: Finished difference. Result has 114 places, 176 transitions, 2180 flow [2024-06-27 22:52:54,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2180, PETRI_PLACES=114, PETRI_TRANSITIONS=176} [2024-06-27 22:52:54,801 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 51 predicate places. [2024-06-27 22:52:54,801 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 176 transitions, 2180 flow [2024-06-27 22:52:54,801 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 22:52:54,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:52:54,802 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 22:52:54,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 22:52:54,802 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 22:52:54,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:52:54,802 INFO L85 PathProgramCache]: Analyzing trace with hash -315864580, now seen corresponding path program 2 times [2024-06-27 22:52:54,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:52:54,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456608731] [2024-06-27 22:52:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:52:54,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:52:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:52:55,066 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 22:52:55,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:52:55,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456608731] [2024-06-27 22:52:55,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456608731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:52:55,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:52:55,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 22:52:55,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018501385] [2024-06-27 22:52:55,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:52:55,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 22:52:55,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:52:55,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 22:52:55,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 22:52:55,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:52:55,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 176 transitions, 2180 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 22:52:55,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:52:55,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:52:55,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:52:56,885 INFO L124 PetriNetUnfolderBase]: 8619/13678 cut-off events. [2024-06-27 22:52:56,885 INFO L125 PetriNetUnfolderBase]: For 101007/101013 co-relation queries the response was YES. [2024-06-27 22:52:56,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63221 conditions, 13678 events. 8619/13678 cut-off events. For 101007/101013 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 99115 event pairs, 1342 based on Foata normal form. 13/13593 useless extension candidates. Maximal degree in co-relation 63173. Up to 9453 conditions per place. [2024-06-27 22:52:57,019 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 141 selfloop transitions, 74 changer transitions 0/229 dead transitions. [2024-06-27 22:52:57,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 229 transitions, 2836 flow [2024-06-27 22:52:57,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:52:57,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:52:57,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 194 transitions. [2024-06-27 22:52:57,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6807017543859649 [2024-06-27 22:52:57,021 INFO L175 Difference]: Start difference. First operand has 114 places, 176 transitions, 2180 flow. Second operand 5 states and 194 transitions. [2024-06-27 22:52:57,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 229 transitions, 2836 flow [2024-06-27 22:52:57,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 229 transitions, 2709 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 22:52:57,369 INFO L231 Difference]: Finished difference. Result has 114 places, 178 transitions, 2269 flow [2024-06-27 22:52:57,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2053, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2269, PETRI_PLACES=114, PETRI_TRANSITIONS=178} [2024-06-27 22:52:57,369 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 51 predicate places. [2024-06-27 22:52:57,369 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 178 transitions, 2269 flow [2024-06-27 22:52:57,370 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 22:52:57,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:52:57,370 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 22:52:57,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 22:52:57,370 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 22:52:57,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:52:57,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1205783831, now seen corresponding path program 1 times [2024-06-27 22:52:57,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:52:57,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102531095] [2024-06-27 22:52:57,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:52:57,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:52:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:52:57,463 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 22:52:57,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:52:57,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102531095] [2024-06-27 22:52:57,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102531095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:52:57,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:52:57,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 22:52:57,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54951994] [2024-06-27 22:52:57,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:52:57,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 22:52:57,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:52:57,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 22:52:57,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 22:52:57,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-06-27 22:52:57,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 178 transitions, 2269 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 22:52:57,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:52:57,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-06-27 22:52:57,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:52:59,087 INFO L124 PetriNetUnfolderBase]: 7473/12370 cut-off events. [2024-06-27 22:52:59,087 INFO L125 PetriNetUnfolderBase]: For 93352/93763 co-relation queries the response was YES. [2024-06-27 22:52:59,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55766 conditions, 12370 events. 7473/12370 cut-off events. For 93352/93763 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 93772 event pairs, 2806 based on Foata normal form. 260/12379 useless extension candidates. Maximal degree in co-relation 55718. Up to 9719 conditions per place. [2024-06-27 22:52:59,184 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 156 selfloop transitions, 21 changer transitions 0/218 dead transitions. [2024-06-27 22:52:59,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 218 transitions, 2854 flow [2024-06-27 22:52:59,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:52:59,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:52:59,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 154 transitions. [2024-06-27 22:52:59,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6754385964912281 [2024-06-27 22:52:59,185 INFO L175 Difference]: Start difference. First operand has 114 places, 178 transitions, 2269 flow. Second operand 4 states and 154 transitions. [2024-06-27 22:52:59,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 218 transitions, 2854 flow [2024-06-27 22:52:59,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 218 transitions, 2709 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 22:52:59,508 INFO L231 Difference]: Finished difference. Result has 116 places, 189 transitions, 2317 flow [2024-06-27 22:52:59,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2124, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2317, PETRI_PLACES=116, PETRI_TRANSITIONS=189} [2024-06-27 22:52:59,508 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 53 predicate places. [2024-06-27 22:52:59,508 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 189 transitions, 2317 flow [2024-06-27 22:52:59,509 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 22:52:59,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:52:59,509 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 22:52:59,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 22:52:59,509 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 22:52:59,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:52:59,509 INFO L85 PathProgramCache]: Analyzing trace with hash 907385186, now seen corresponding path program 1 times [2024-06-27 22:52:59,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:52:59,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885854834] [2024-06-27 22:52:59,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:52:59,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:52:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:52:59,767 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 22:52:59,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:52:59,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885854834] [2024-06-27 22:52:59,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885854834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:52:59,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:52:59,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:52:59,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535897167] [2024-06-27 22:52:59,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:52:59,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:52:59,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:52:59,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:52:59,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:52:59,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:52:59,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 189 transitions, 2317 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 22:52:59,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:52:59,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:52:59,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:01,561 INFO L124 PetriNetUnfolderBase]: 8758/13631 cut-off events. [2024-06-27 22:53:01,561 INFO L125 PetriNetUnfolderBase]: For 105279/105285 co-relation queries the response was YES. [2024-06-27 22:53:01,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64502 conditions, 13631 events. 8758/13631 cut-off events. For 105279/105285 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 95454 event pairs, 1850 based on Foata normal form. 9/13548 useless extension candidates. Maximal degree in co-relation 64452. Up to 10098 conditions per place. [2024-06-27 22:53:01,674 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 152 selfloop transitions, 74 changer transitions 0/240 dead transitions. [2024-06-27 22:53:01,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 240 transitions, 3005 flow [2024-06-27 22:53:01,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:53:01,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:53:01,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 188 transitions. [2024-06-27 22:53:01,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6596491228070176 [2024-06-27 22:53:01,682 INFO L175 Difference]: Start difference. First operand has 116 places, 189 transitions, 2317 flow. Second operand 5 states and 188 transitions. [2024-06-27 22:53:01,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 240 transitions, 3005 flow [2024-06-27 22:53:02,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 240 transitions, 2983 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-06-27 22:53:02,188 INFO L231 Difference]: Finished difference. Result has 121 places, 196 transitions, 2565 flow [2024-06-27 22:53:02,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2295, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2565, PETRI_PLACES=121, PETRI_TRANSITIONS=196} [2024-06-27 22:53:02,189 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 58 predicate places. [2024-06-27 22:53:02,189 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 196 transitions, 2565 flow [2024-06-27 22:53:02,189 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 22:53:02,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:02,190 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 22:53:02,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 22:53:02,190 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 22:53:02,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:02,190 INFO L85 PathProgramCache]: Analyzing trace with hash -781957746, now seen corresponding path program 2 times [2024-06-27 22:53:02,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:02,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247111216] [2024-06-27 22:53:02,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:02,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:02,437 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 22:53:02,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:02,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247111216] [2024-06-27 22:53:02,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247111216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:02,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:02,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:53:02,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124392846] [2024-06-27 22:53:02,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:02,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:53:02,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:02,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:53:02,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:53:02,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:02,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 196 transitions, 2565 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 22:53:02,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:02,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:02,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:04,421 INFO L124 PetriNetUnfolderBase]: 9178/14517 cut-off events. [2024-06-27 22:53:04,421 INFO L125 PetriNetUnfolderBase]: For 123736/123742 co-relation queries the response was YES. [2024-06-27 22:53:04,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70045 conditions, 14517 events. 9178/14517 cut-off events. For 123736/123742 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 105997 event pairs, 1219 based on Foata normal form. 25/14393 useless extension candidates. Maximal degree in co-relation 69992. Up to 8479 conditions per place. [2024-06-27 22:53:04,569 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 162 selfloop transitions, 85 changer transitions 0/261 dead transitions. [2024-06-27 22:53:04,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 261 transitions, 3512 flow [2024-06-27 22:53:04,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:53:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:53:04,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 220 transitions. [2024-06-27 22:53:04,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6432748538011696 [2024-06-27 22:53:04,572 INFO L175 Difference]: Start difference. First operand has 121 places, 196 transitions, 2565 flow. Second operand 6 states and 220 transitions. [2024-06-27 22:53:04,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 261 transitions, 3512 flow [2024-06-27 22:53:04,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 261 transitions, 3341 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 22:53:04,994 INFO L231 Difference]: Finished difference. Result has 124 places, 202 transitions, 2719 flow [2024-06-27 22:53:04,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2394, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2719, PETRI_PLACES=124, PETRI_TRANSITIONS=202} [2024-06-27 22:53:04,995 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 61 predicate places. [2024-06-27 22:53:04,995 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 202 transitions, 2719 flow [2024-06-27 22:53:04,996 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 22:53:04,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:04,996 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 22:53:04,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 22:53:04,996 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 22:53:04,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:04,997 INFO L85 PathProgramCache]: Analyzing trace with hash -781688976, now seen corresponding path program 3 times [2024-06-27 22:53:04,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:04,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005360133] [2024-06-27 22:53:04,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:04,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:05,274 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 22:53:05,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:05,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005360133] [2024-06-27 22:53:05,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005360133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:05,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:05,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:53:05,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388599082] [2024-06-27 22:53:05,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:05,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:53:05,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:05,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:53:05,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:53:05,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:05,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 202 transitions, 2719 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 22:53:05,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:05,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:05,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:07,391 INFO L124 PetriNetUnfolderBase]: 9586/15251 cut-off events. [2024-06-27 22:53:07,391 INFO L125 PetriNetUnfolderBase]: For 140951/140957 co-relation queries the response was YES. [2024-06-27 22:53:07,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74110 conditions, 15251 events. 9586/15251 cut-off events. For 140951/140957 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 113232 event pairs, 1425 based on Foata normal form. 25/15056 useless extension candidates. Maximal degree in co-relation 74056. Up to 7665 conditions per place. [2024-06-27 22:53:07,531 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 195 selfloop transitions, 68 changer transitions 0/277 dead transitions. [2024-06-27 22:53:07,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 277 transitions, 3772 flow [2024-06-27 22:53:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:53:07,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:53:07,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 224 transitions. [2024-06-27 22:53:07,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6549707602339181 [2024-06-27 22:53:07,532 INFO L175 Difference]: Start difference. First operand has 124 places, 202 transitions, 2719 flow. Second operand 6 states and 224 transitions. [2024-06-27 22:53:07,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 277 transitions, 3772 flow [2024-06-27 22:53:07,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 277 transitions, 3699 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-27 22:53:07,949 INFO L231 Difference]: Finished difference. Result has 131 places, 207 transitions, 2962 flow [2024-06-27 22:53:07,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2652, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2962, PETRI_PLACES=131, PETRI_TRANSITIONS=207} [2024-06-27 22:53:07,950 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 68 predicate places. [2024-06-27 22:53:07,950 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 207 transitions, 2962 flow [2024-06-27 22:53:07,950 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 22:53:07,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:07,951 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 22:53:07,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 22:53:07,951 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 22:53:07,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:07,951 INFO L85 PathProgramCache]: Analyzing trace with hash -862265522, now seen corresponding path program 4 times [2024-06-27 22:53:07,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:07,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113540662] [2024-06-27 22:53:07,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:07,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:08,192 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 22:53:08,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:08,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113540662] [2024-06-27 22:53:08,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113540662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:08,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:08,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:53:08,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549877879] [2024-06-27 22:53:08,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:08,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:53:08,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:08,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:53:08,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:53:08,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:08,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 207 transitions, 2962 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 22:53:08,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:08,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:08,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:10,447 INFO L124 PetriNetUnfolderBase]: 9934/15955 cut-off events. [2024-06-27 22:53:10,448 INFO L125 PetriNetUnfolderBase]: For 167131/167137 co-relation queries the response was YES. [2024-06-27 22:53:10,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80221 conditions, 15955 events. 9934/15955 cut-off events. For 167131/167137 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 119894 event pairs, 2120 based on Foata normal form. 25/15835 useless extension candidates. Maximal degree in co-relation 80163. Up to 11616 conditions per place. [2024-06-27 22:53:10,571 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 179 selfloop transitions, 69 changer transitions 0/262 dead transitions. [2024-06-27 22:53:10,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 262 transitions, 3715 flow [2024-06-27 22:53:10,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:53:10,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:53:10,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 192 transitions. [2024-06-27 22:53:10,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6736842105263158 [2024-06-27 22:53:10,573 INFO L175 Difference]: Start difference. First operand has 131 places, 207 transitions, 2962 flow. Second operand 5 states and 192 transitions. [2024-06-27 22:53:10,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 262 transitions, 3715 flow [2024-06-27 22:53:11,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 262 transitions, 3631 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 22:53:11,078 INFO L231 Difference]: Finished difference. Result has 134 places, 213 transitions, 3136 flow [2024-06-27 22:53:11,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2880, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3136, PETRI_PLACES=134, PETRI_TRANSITIONS=213} [2024-06-27 22:53:11,079 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 71 predicate places. [2024-06-27 22:53:11,079 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 213 transitions, 3136 flow [2024-06-27 22:53:11,079 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 22:53:11,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:11,079 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 22:53:11,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 22:53:11,079 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 22:53:11,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:11,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1201865616, now seen corresponding path program 5 times [2024-06-27 22:53:11,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:11,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100541567] [2024-06-27 22:53:11,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:11,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:11,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:53:11,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:11,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100541567] [2024-06-27 22:53:11,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100541567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:11,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:11,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:53:11,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120687694] [2024-06-27 22:53:11,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:11,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:53:11,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:11,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:53:11,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:53:11,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:11,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 213 transitions, 3136 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 22:53:11,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:11,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:11,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:13,636 INFO L124 PetriNetUnfolderBase]: 10062/16093 cut-off events. [2024-06-27 22:53:13,636 INFO L125 PetriNetUnfolderBase]: For 175680/175686 co-relation queries the response was YES. [2024-06-27 22:53:13,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81650 conditions, 16093 events. 10062/16093 cut-off events. For 175680/175686 co-relation queries the response was YES. Maximal size of possible extension queue 910. Compared 121025 event pairs, 1452 based on Foata normal form. 25/15972 useless extension candidates. Maximal degree in co-relation 81591. Up to 10388 conditions per place. [2024-06-27 22:53:14,011 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 182 selfloop transitions, 85 changer transitions 0/281 dead transitions. [2024-06-27 22:53:14,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 281 transitions, 4049 flow [2024-06-27 22:53:14,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:53:14,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:53:14,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 230 transitions. [2024-06-27 22:53:14,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.672514619883041 [2024-06-27 22:53:14,013 INFO L175 Difference]: Start difference. First operand has 134 places, 213 transitions, 3136 flow. Second operand 6 states and 230 transitions. [2024-06-27 22:53:14,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 281 transitions, 4049 flow [2024-06-27 22:53:14,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 281 transitions, 3873 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 22:53:14,746 INFO L231 Difference]: Finished difference. Result has 137 places, 216 transitions, 3222 flow [2024-06-27 22:53:14,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=2960, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3222, PETRI_PLACES=137, PETRI_TRANSITIONS=216} [2024-06-27 22:53:14,747 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 74 predicate places. [2024-06-27 22:53:14,747 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 216 transitions, 3222 flow [2024-06-27 22:53:14,747 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 22:53:14,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:14,748 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 22:53:14,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 22:53:14,748 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:14,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:14,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1249491512, now seen corresponding path program 1 times [2024-06-27 22:53:14,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:14,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587614315] [2024-06-27 22:53:14,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:14,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:53:14,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:14,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587614315] [2024-06-27 22:53:14,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587614315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:14,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:14,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:53:14,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447501378] [2024-06-27 22:53:14,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:14,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:53:14,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:14,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:53:14,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:53:14,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-06-27 22:53:14,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 216 transitions, 3222 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 22:53:14,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:14,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-06-27 22:53:14,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:17,103 INFO L124 PetriNetUnfolderBase]: 8600/14494 cut-off events. [2024-06-27 22:53:17,103 INFO L125 PetriNetUnfolderBase]: For 166253/167043 co-relation queries the response was YES. [2024-06-27 22:53:17,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71657 conditions, 14494 events. 8600/14494 cut-off events. For 166253/167043 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 115613 event pairs, 3048 based on Foata normal form. 527/14704 useless extension candidates. Maximal degree in co-relation 71597. Up to 11389 conditions per place. [2024-06-27 22:53:17,239 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 178 selfloop transitions, 21 changer transitions 0/244 dead transitions. [2024-06-27 22:53:17,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 244 transitions, 3720 flow [2024-06-27 22:53:17,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 22:53:17,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 22:53:17,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2024-06-27 22:53:17,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6710526315789473 [2024-06-27 22:53:17,241 INFO L175 Difference]: Start difference. First operand has 137 places, 216 transitions, 3222 flow. Second operand 4 states and 153 transitions. [2024-06-27 22:53:17,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 244 transitions, 3720 flow [2024-06-27 22:53:17,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 244 transitions, 3625 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 22:53:17,890 INFO L231 Difference]: Finished difference. Result has 139 places, 216 transitions, 3189 flow [2024-06-27 22:53:17,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=3127, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3189, PETRI_PLACES=139, PETRI_TRANSITIONS=216} [2024-06-27 22:53:17,891 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 76 predicate places. [2024-06-27 22:53:17,891 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 216 transitions, 3189 flow [2024-06-27 22:53:17,891 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 22:53:17,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:17,891 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 22:53:17,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 22:53:17,891 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 22:53:17,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:17,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1791300595, now seen corresponding path program 1 times [2024-06-27 22:53:17,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:17,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545943631] [2024-06-27 22:53:17,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:17,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:18,157 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 22:53:18,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:18,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545943631] [2024-06-27 22:53:18,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545943631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:18,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:18,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:53:18,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446360272] [2024-06-27 22:53:18,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:18,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:53:18,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:18,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:53:18,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:53:18,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:18,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 216 transitions, 3189 flow. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 22:53:18,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:18,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:18,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:21,308 INFO L124 PetriNetUnfolderBase]: 13854/22687 cut-off events. [2024-06-27 22:53:21,308 INFO L125 PetriNetUnfolderBase]: For 228236/228242 co-relation queries the response was YES. [2024-06-27 22:53:21,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106437 conditions, 22687 events. 13854/22687 cut-off events. For 228236/228242 co-relation queries the response was YES. Maximal size of possible extension queue 1301. Compared 187936 event pairs, 2973 based on Foata normal form. 65/22517 useless extension candidates. Maximal degree in co-relation 106375. Up to 6364 conditions per place. [2024-06-27 22:53:21,582 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 231 selfloop transitions, 62 changer transitions 0/307 dead transitions. [2024-06-27 22:53:21,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 307 transitions, 4454 flow [2024-06-27 22:53:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:53:21,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:53:21,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 239 transitions. [2024-06-27 22:53:21,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6988304093567251 [2024-06-27 22:53:21,593 INFO L175 Difference]: Start difference. First operand has 139 places, 216 transitions, 3189 flow. Second operand 6 states and 239 transitions. [2024-06-27 22:53:21,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 307 transitions, 4454 flow [2024-06-27 22:53:22,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 307 transitions, 4400 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 22:53:22,683 INFO L231 Difference]: Finished difference. Result has 144 places, 229 transitions, 3574 flow [2024-06-27 22:53:22,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=3137, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3574, PETRI_PLACES=144, PETRI_TRANSITIONS=229} [2024-06-27 22:53:22,684 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 81 predicate places. [2024-06-27 22:53:22,684 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 229 transitions, 3574 flow [2024-06-27 22:53:22,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 22:53:22,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:22,684 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 22:53:22,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 22:53:22,685 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:22,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:22,685 INFO L85 PathProgramCache]: Analyzing trace with hash -357836401, now seen corresponding path program 2 times [2024-06-27 22:53:22,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:22,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826342983] [2024-06-27 22:53:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:22,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:22,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:22,945 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 22:53:22,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:22,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826342983] [2024-06-27 22:53:22,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826342983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:22,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:22,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 22:53:22,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490445886] [2024-06-27 22:53:22,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:22,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 22:53:22,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:22,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 22:53:22,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 22:53:22,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:22,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 229 transitions, 3574 flow. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 22:53:22,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:22,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:22,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:26,597 INFO L124 PetriNetUnfolderBase]: 15162/24987 cut-off events. [2024-06-27 22:53:26,597 INFO L125 PetriNetUnfolderBase]: For 290601/290607 co-relation queries the response was YES. [2024-06-27 22:53:26,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122000 conditions, 24987 events. 15162/24987 cut-off events. For 290601/290607 co-relation queries the response was YES. Maximal size of possible extension queue 1455. Compared 211414 event pairs, 3775 based on Foata normal form. 41/24758 useless extension candidates. Maximal degree in co-relation 121935. Up to 7602 conditions per place. [2024-06-27 22:53:26,838 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 243 selfloop transitions, 54 changer transitions 0/311 dead transitions. [2024-06-27 22:53:26,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 311 transitions, 4728 flow [2024-06-27 22:53:26,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 22:53:26,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 22:53:26,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 236 transitions. [2024-06-27 22:53:26,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6900584795321637 [2024-06-27 22:53:26,839 INFO L175 Difference]: Start difference. First operand has 144 places, 229 transitions, 3574 flow. Second operand 6 states and 236 transitions. [2024-06-27 22:53:26,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 311 transitions, 4728 flow [2024-06-27 22:53:29,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 311 transitions, 4533 flow, removed 89 selfloop flow, removed 1 redundant places. [2024-06-27 22:53:29,015 INFO L231 Difference]: Finished difference. Result has 149 places, 235 transitions, 3643 flow [2024-06-27 22:53:29,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=3349, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3643, PETRI_PLACES=149, PETRI_TRANSITIONS=235} [2024-06-27 22:53:29,016 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 86 predicate places. [2024-06-27 22:53:29,016 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 235 transitions, 3643 flow [2024-06-27 22:53:29,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 22:53:29,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:29,016 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 22:53:29,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 22:53:29,016 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:29,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:29,017 INFO L85 PathProgramCache]: Analyzing trace with hash 953721520, now seen corresponding path program 1 times [2024-06-27 22:53:29,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:29,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987506137] [2024-06-27 22:53:29,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:29,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:29,155 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 22:53:29,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:29,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987506137] [2024-06-27 22:53:29,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987506137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:29,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:29,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:53:29,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875812968] [2024-06-27 22:53:29,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:29,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:53:29,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:29,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:53:29,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:53:29,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-06-27 22:53:29,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 235 transitions, 3643 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 22:53:29,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:29,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-06-27 22:53:29,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:33,219 INFO L124 PetriNetUnfolderBase]: 13553/23167 cut-off events. [2024-06-27 22:53:33,219 INFO L125 PetriNetUnfolderBase]: For 262233/263013 co-relation queries the response was YES. [2024-06-27 22:53:33,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107995 conditions, 23167 events. 13553/23167 cut-off events. For 262233/263013 co-relation queries the response was YES. Maximal size of possible extension queue 1438. Compared 202709 event pairs, 5217 based on Foata normal form. 547/23324 useless extension candidates. Maximal degree in co-relation 107927. Up to 17567 conditions per place. [2024-06-27 22:53:33,396 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 175 selfloop transitions, 57 changer transitions 0/284 dead transitions. [2024-06-27 22:53:33,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 284 transitions, 4398 flow [2024-06-27 22:53:33,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:53:33,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:53:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 193 transitions. [2024-06-27 22:53:33,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6771929824561403 [2024-06-27 22:53:33,398 INFO L175 Difference]: Start difference. First operand has 149 places, 235 transitions, 3643 flow. Second operand 5 states and 193 transitions. [2024-06-27 22:53:33,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 284 transitions, 4398 flow [2024-06-27 22:53:34,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 284 transitions, 4174 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-27 22:53:34,293 INFO L231 Difference]: Finished difference. Result has 152 places, 243 transitions, 3724 flow [2024-06-27 22:53:34,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=3427, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3724, PETRI_PLACES=152, PETRI_TRANSITIONS=243} [2024-06-27 22:53:34,293 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 89 predicate places. [2024-06-27 22:53:34,294 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 243 transitions, 3724 flow [2024-06-27 22:53:34,294 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 22:53:34,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:34,294 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 22:53:34,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 22:53:34,294 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:34,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:34,295 INFO L85 PathProgramCache]: Analyzing trace with hash 79515170, now seen corresponding path program 2 times [2024-06-27 22:53:34,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:34,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476628272] [2024-06-27 22:53:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:34,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:34,493 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 22:53:34,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:34,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476628272] [2024-06-27 22:53:34,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476628272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:34,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:34,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:53:34,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024402755] [2024-06-27 22:53:34,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:34,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:53:34,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:34,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:53:34,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:53:34,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 57 [2024-06-27 22:53:34,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 243 transitions, 3724 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 22:53:34,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:34,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 57 [2024-06-27 22:53:34,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:38,321 INFO L124 PetriNetUnfolderBase]: 13728/23345 cut-off events. [2024-06-27 22:53:38,321 INFO L125 PetriNetUnfolderBase]: For 258807/259703 co-relation queries the response was YES. [2024-06-27 22:53:38,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108746 conditions, 23345 events. 13728/23345 cut-off events. For 258807/259703 co-relation queries the response was YES. Maximal size of possible extension queue 1451. Compared 203385 event pairs, 5352 based on Foata normal form. 552/23382 useless extension candidates. Maximal degree in co-relation 108676. Up to 17344 conditions per place. [2024-06-27 22:53:38,535 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 175 selfloop transitions, 62 changer transitions 0/289 dead transitions. [2024-06-27 22:53:38,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 289 transitions, 4572 flow [2024-06-27 22:53:38,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:53:38,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:53:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2024-06-27 22:53:38,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6421052631578947 [2024-06-27 22:53:38,538 INFO L175 Difference]: Start difference. First operand has 152 places, 243 transitions, 3724 flow. Second operand 5 states and 183 transitions. [2024-06-27 22:53:38,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 289 transitions, 4572 flow [2024-06-27 22:53:39,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 289 transitions, 4501 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 22:53:39,578 INFO L231 Difference]: Finished difference. Result has 157 places, 254 transitions, 4061 flow [2024-06-27 22:53:39,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=3655, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4061, PETRI_PLACES=157, PETRI_TRANSITIONS=254} [2024-06-27 22:53:39,579 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 94 predicate places. [2024-06-27 22:53:39,579 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 254 transitions, 4061 flow [2024-06-27 22:53:39,579 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 22:53:39,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:39,580 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 22:53:39,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 22:53:39,580 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:39,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:39,580 INFO L85 PathProgramCache]: Analyzing trace with hash 69045602, now seen corresponding path program 1 times [2024-06-27 22:53:39,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:39,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921015175] [2024-06-27 22:53:39,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:39,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 22:53:39,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:39,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921015175] [2024-06-27 22:53:39,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921015175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:39,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:39,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:53:39,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515943911] [2024-06-27 22:53:39,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:39,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:53:39,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:39,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:53:39,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:53:39,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:39,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 254 transitions, 4061 flow. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:39,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:39,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:39,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 22:53:44,232 INFO L124 PetriNetUnfolderBase]: 15266/25211 cut-off events. [2024-06-27 22:53:44,232 INFO L125 PetriNetUnfolderBase]: For 292262/292262 co-relation queries the response was YES. [2024-06-27 22:53:44,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124950 conditions, 25211 events. 15266/25211 cut-off events. For 292262/292262 co-relation queries the response was YES. Maximal size of possible extension queue 1469. Compared 213440 event pairs, 6753 based on Foata normal form. 2/24787 useless extension candidates. Maximal degree in co-relation 124877. Up to 21064 conditions per place. [2024-06-27 22:53:44,460 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 284 selfloop transitions, 23 changer transitions 0/321 dead transitions. [2024-06-27 22:53:44,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 321 transitions, 5268 flow [2024-06-27 22:53:44,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 22:53:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 22:53:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 187 transitions. [2024-06-27 22:53:44,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.656140350877193 [2024-06-27 22:53:44,461 INFO L175 Difference]: Start difference. First operand has 157 places, 254 transitions, 4061 flow. Second operand 5 states and 187 transitions. [2024-06-27 22:53:44,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 321 transitions, 5268 flow [2024-06-27 22:53:45,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 321 transitions, 5196 flow, removed 36 selfloop flow, removed 0 redundant places. [2024-06-27 22:53:45,683 INFO L231 Difference]: Finished difference. Result has 164 places, 270 transitions, 4394 flow [2024-06-27 22:53:45,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=3989, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4394, PETRI_PLACES=164, PETRI_TRANSITIONS=270} [2024-06-27 22:53:45,683 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 101 predicate places. [2024-06-27 22:53:45,683 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 270 transitions, 4394 flow [2024-06-27 22:53:45,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:45,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 22:53:45,684 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 22:53:45,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 22:53:45,684 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 22:53:45,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 22:53:45,685 INFO L85 PathProgramCache]: Analyzing trace with hash 909796292, now seen corresponding path program 2 times [2024-06-27 22:53:45,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 22:53:45,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815975735] [2024-06-27 22:53:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 22:53:45,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 22:53:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 22:53:45,776 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 22:53:45,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 22:53:45,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815975735] [2024-06-27 22:53:45,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815975735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 22:53:45,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 22:53:45,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 22:53:45,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748038623] [2024-06-27 22:53:45,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 22:53:45,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 22:53:45,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 22:53:45,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 22:53:45,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 22:53:45,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 57 [2024-06-27 22:53:45,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 270 transitions, 4394 flow. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 22:53:45,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 22:53:45,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 57 [2024-06-27 22:53:45,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand