./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe020_power.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe020_power.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/safe020_power.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe020_power.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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 00:28:40,455 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:28:40,537 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:28:40,542 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:28:40,543 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:28:40,567 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:28:40,568 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:28:40,568 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:28:40,569 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:28:40,573 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:28:40,573 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:28:40,574 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:28:40,575 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:28:40,576 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:28:40,576 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:28:40,576 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:28:40,577 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:28:40,577 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:28:40,577 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:28:40,577 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:28:40,578 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:28:40,578 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:28:40,579 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:28:40,580 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:28:40,580 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:28:40,580 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:28:40,580 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:28:40,581 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:28:40,581 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:28:40,582 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:28:40,583 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:28:40,583 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:28:40,583 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:28:40,583 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:28:40,583 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:28:40,584 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:28:40,584 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:28:40,584 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:28:40,584 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:28:40,584 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:28:40,585 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:28:40,585 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:28:40,585 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:28:40,585 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 00:28:40,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:28:40,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:28:40,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:28:40,921 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:28:40,921 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:28:40,922 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe020_power.i [2024-06-28 00:28:42,118 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:28:42,417 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:28:42,417 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe020_power.i [2024-06-28 00:28:42,442 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66260d86e/0e22a0f1b99042a186b76c376389d62d/FLAGb76dee642 [2024-06-28 00:28:42,455 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66260d86e/0e22a0f1b99042a186b76c376389d62d [2024-06-28 00:28:42,457 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:28:42,458 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:28:42,460 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe020_power.yml/witness.yml [2024-06-28 00:28:42,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:28:42,534 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:28:42,535 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:28:42,535 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:28:42,539 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:28:42,539 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:28:42" (1/2) ... [2024-06-28 00:28:42,540 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@421c8ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:28:42, skipping insertion in model container [2024-06-28 00:28:42,540 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:28:42" (1/2) ... [2024-06-28 00:28:42,542 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1851a4e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:28:42, skipping insertion in model container [2024-06-28 00:28:42,543 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:28:42" (2/2) ... [2024-06-28 00:28:42,543 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@421c8ca5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:28:42, skipping insertion in model container [2024-06-28 00:28:42,544 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:28:42" (2/2) ... [2024-06-28 00:28:42,544 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:28:42,569 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:28:42,571 INFO L97 edCorrectnessWitness]: Location invariant before [L862-L862] ! multithreaded || ((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x$r_buff0_thd2 >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-28 00:28:42,572 INFO L97 edCorrectnessWitness]: Location invariant before [L865-L865] ! multithreaded || ((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x$r_buff0_thd2 >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-28 00:28:42,572 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] ! multithreaded || ((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x$r_buff0_thd2 >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-28 00:28:42,572 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:28:42,572 INFO L106 edCorrectnessWitness]: ghost_update [L860-L860] multithreaded = 1; [2024-06-28 00:28:42,612 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:28:42,979 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:28:42,990 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:28:43,094 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:28:43,135 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:28:43,137 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:28:43 WrapperNode [2024-06-28 00:28:43,137 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:28:43,138 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:28:43,138 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:28:43,138 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:28:43,144 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 28.06 12:28:43" (1/1) ... [2024-06-28 00:28:43,159 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 28.06 12:28:43" (1/1) ... [2024-06-28 00:28:43,191 INFO L138 Inliner]: procedures = 175, calls = 72, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 196 [2024-06-28 00:28:43,191 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:28:43,192 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:28:43,192 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:28:43,192 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:28:43,204 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:28:43" (1/1) ... [2024-06-28 00:28:43,205 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:28:43" (1/1) ... [2024-06-28 00:28:43,209 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:28:43" (1/1) ... [2024-06-28 00:28:43,320 INFO L175 MemorySlicer]: Split 30 memory accesses to 2 slices as follows [2, 28]. 93 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-28 00:28:43,328 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:28:43" (1/1) ... [2024-06-28 00:28:43,329 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:28:43" (1/1) ... [2024-06-28 00:28:43,337 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:28:43" (1/1) ... [2024-06-28 00:28:43,354 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:28:43" (1/1) ... [2024-06-28 00:28:43,356 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:28:43" (1/1) ... [2024-06-28 00:28:43,358 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:28:43" (1/1) ... [2024-06-28 00:28:43,370 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:28:43,371 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:28:43,371 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:28:43,371 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:28:43,372 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:28:43" (1/1) ... [2024-06-28 00:28:43,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:28:43,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:28:43,402 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) [2024-06-28 00:28:43,422 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 [2024-06-28 00:28:43,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 00:28:43,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 00:28:43,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 00:28:43,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 00:28:43,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:28:43,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:28:43,440 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:28:43,440 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:28:43,440 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:28:43,440 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:28:43,440 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:28:43,441 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:28:43,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:28:43,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 00:28:43,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:28:43,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:28:43,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:28:43,445 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:28:43,609 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:28:43,611 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:28:44,021 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:28:44,021 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:28:44,366 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:28:44,366 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:28:44,366 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:28:44 BoogieIcfgContainer [2024-06-28 00:28:44,367 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:28:44,369 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:28:44,369 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:28:44,371 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:28:44,371 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:28:42" (1/4) ... [2024-06-28 00:28:44,372 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500dfa60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:28:44, skipping insertion in model container [2024-06-28 00:28:44,372 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:28:42" (2/4) ... [2024-06-28 00:28:44,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500dfa60 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:28:44, skipping insertion in model container [2024-06-28 00:28:44,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:28:43" (3/4) ... [2024-06-28 00:28:44,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500dfa60 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:28:44, skipping insertion in model container [2024-06-28 00:28:44,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:28:44" (4/4) ... [2024-06-28 00:28:44,376 INFO L112 eAbstractionObserver]: Analyzing ICFG safe020_power.i [2024-06-28 00:28:44,391 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:28:44,392 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 00:28:44,392 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:28:44,482 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:28:44,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 00:28:44,552 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-28 00:28:44,552 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:28:44,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 00:28:44,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 00:28:44,559 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-28 00:28:44,571 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:28:44,581 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;@1608b808, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:28:44,581 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 00:28:44,585 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:28:44,586 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 00:28:44,586 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:28:44,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:44,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:28:44,587 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:44,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:44,592 INFO L85 PathProgramCache]: Analyzing trace with hash 781543131, now seen corresponding path program 1 times [2024-06-28 00:28:44,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:44,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318815055] [2024-06-28 00:28:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:44,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:45,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:45,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318815055] [2024-06-28 00:28:45,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318815055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:45,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:45,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:28:45,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407291411] [2024-06-28 00:28:45,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:45,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:28:45,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:45,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:28:45,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:28:45,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-28 00:28:45,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:45,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:45,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-28 00:28:45,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:45,593 INFO L124 PetriNetUnfolderBase]: 324/580 cut-off events. [2024-06-28 00:28:45,593 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-06-28 00:28:45,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1143 conditions, 580 events. 324/580 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3200 event pairs, 69 based on Foata normal form. 12/567 useless extension candidates. Maximal degree in co-relation 1131. Up to 439 conditions per place. [2024-06-28 00:28:45,600 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 29 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2024-06-28 00:28:45,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 158 flow [2024-06-28 00:28:45,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:28:45,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:28:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-28 00:28:45,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-28 00:28:45,612 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 76 transitions. [2024-06-28 00:28:45,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 158 flow [2024-06-28 00:28:45,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 154 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:28:45,617 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 80 flow [2024-06-28 00:28:45,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2024-06-28 00:28:45,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2024-06-28 00:28:45,622 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 80 flow [2024-06-28 00:28:45,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:45,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:45,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:28:45,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:28:45,623 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:45,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:45,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1028280491, now seen corresponding path program 1 times [2024-06-28 00:28:45,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:45,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589214368] [2024-06-28 00:28:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:45,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:45,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:45,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589214368] [2024-06-28 00:28:45,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589214368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:45,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:45,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:28:45,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223723646] [2024-06-28 00:28:45,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:45,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:28:45,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:45,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:28:45,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:28:45,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-28 00:28:45,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:45,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:45,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-28 00:28:45,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:46,121 INFO L124 PetriNetUnfolderBase]: 319/613 cut-off events. [2024-06-28 00:28:46,121 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2024-06-28 00:28:46,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1284 conditions, 613 events. 319/613 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3300 event pairs, 150 based on Foata normal form. 2/603 useless extension candidates. Maximal degree in co-relation 1272. Up to 498 conditions per place. [2024-06-28 00:28:46,125 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-28 00:28:46,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 211 flow [2024-06-28 00:28:46,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:28:46,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:28:46,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-28 00:28:46,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-28 00:28:46,127 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 80 flow. Second operand 4 states and 99 transitions. [2024-06-28 00:28:46,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 211 flow [2024-06-28 00:28:46,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 205 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 00:28:46,129 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 123 flow [2024-06-28 00:28:46,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-28 00:28:46,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2024-06-28 00:28:46,130 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 123 flow [2024-06-28 00:28:46,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:46,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:46,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:28:46,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:28:46,131 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:46,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:46,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1811922475, now seen corresponding path program 1 times [2024-06-28 00:28:46,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:46,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846004036] [2024-06-28 00:28:46,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:46,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:46,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:46,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846004036] [2024-06-28 00:28:46,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846004036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:46,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:46,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:28:46,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217662161] [2024-06-28 00:28:46,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:46,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:28:46,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:46,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:28:46,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:28:46,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-28 00:28:46,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:46,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:46,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-28 00:28:46,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:47,044 INFO L124 PetriNetUnfolderBase]: 311/599 cut-off events. [2024-06-28 00:28:47,045 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-06-28 00:28:47,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1467 conditions, 599 events. 311/599 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3193 event pairs, 137 based on Foata normal form. 4/600 useless extension candidates. Maximal degree in co-relation 1453. Up to 464 conditions per place. [2024-06-28 00:28:47,049 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 40 selfloop transitions, 9 changer transitions 0/60 dead transitions. [2024-06-28 00:28:47,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 277 flow [2024-06-28 00:28:47,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:28:47,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:28:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-28 00:28:47,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2024-06-28 00:28:47,051 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 123 flow. Second operand 5 states and 121 transitions. [2024-06-28 00:28:47,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 277 flow [2024-06-28 00:28:47,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 60 transitions, 277 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 00:28:47,054 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 160 flow [2024-06-28 00:28:47,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=160, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2024-06-28 00:28:47,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-28 00:28:47,055 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 160 flow [2024-06-28 00:28:47,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:47,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:47,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:28:47,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:28:47,056 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:47,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:47,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1919554137, now seen corresponding path program 1 times [2024-06-28 00:28:47,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:47,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575954659] [2024-06-28 00:28:47,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:47,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:47,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:47,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:47,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575954659] [2024-06-28 00:28:47,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575954659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:47,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:47,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:28:47,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369833721] [2024-06-28 00:28:47,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:47,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:28:47,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:47,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:28:47,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:28:47,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 00:28:47,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 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) [2024-06-28 00:28:47,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:47,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 00:28:47,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:48,010 INFO L124 PetriNetUnfolderBase]: 351/673 cut-off events. [2024-06-28 00:28:48,011 INFO L125 PetriNetUnfolderBase]: For 487/487 co-relation queries the response was YES. [2024-06-28 00:28:48,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1803 conditions, 673 events. 351/673 cut-off events. For 487/487 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3628 event pairs, 54 based on Foata normal form. 10/677 useless extension candidates. Maximal degree in co-relation 1785. Up to 428 conditions per place. [2024-06-28 00:28:48,016 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 51 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-28 00:28:48,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 386 flow [2024-06-28 00:28:48,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:28:48,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:28:48,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-28 00:28:48,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-28 00:28:48,018 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 160 flow. Second operand 7 states and 150 transitions. [2024-06-28 00:28:48,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 386 flow [2024-06-28 00:28:48,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 74 transitions, 365 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 00:28:48,021 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 218 flow [2024-06-28 00:28:48,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=218, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-28 00:28:48,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-28 00:28:48,023 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 218 flow [2024-06-28 00:28:48,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 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) [2024-06-28 00:28:48,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:48,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:28:48,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:28:48,024 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:48,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:48,025 INFO L85 PathProgramCache]: Analyzing trace with hash 159628755, now seen corresponding path program 2 times [2024-06-28 00:28:48,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:48,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293225091] [2024-06-28 00:28:48,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:48,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:48,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:48,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293225091] [2024-06-28 00:28:48,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293225091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:48,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:48,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:28:48,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305653860] [2024-06-28 00:28:48,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:48,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:28:48,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:48,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:28:48,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:28:48,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-28 00:28:48,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:48,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:48,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-28 00:28:48,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:48,951 INFO L124 PetriNetUnfolderBase]: 362/682 cut-off events. [2024-06-28 00:28:48,952 INFO L125 PetriNetUnfolderBase]: For 877/880 co-relation queries the response was YES. [2024-06-28 00:28:48,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2091 conditions, 682 events. 362/682 cut-off events. For 877/880 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3669 event pairs, 68 based on Foata normal form. 6/678 useless extension candidates. Maximal degree in co-relation 2071. Up to 445 conditions per place. [2024-06-28 00:28:48,957 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 50 selfloop transitions, 17 changer transitions 0/78 dead transitions. [2024-06-28 00:28:48,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 78 transitions, 484 flow [2024-06-28 00:28:48,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:28:48,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:28:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-28 00:28:48,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-28 00:28:48,959 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 218 flow. Second operand 5 states and 123 transitions. [2024-06-28 00:28:48,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 78 transitions, 484 flow [2024-06-28 00:28:48,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 464 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-28 00:28:48,963 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 337 flow [2024-06-28 00:28:48,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=337, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-28 00:28:48,964 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-28 00:28:48,964 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 337 flow [2024-06-28 00:28:48,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:48,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:48,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:28:48,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:28:48,965 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:48,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:48,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2100633299, now seen corresponding path program 1 times [2024-06-28 00:28:48,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:48,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099156878] [2024-06-28 00:28:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:48,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:49,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:49,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099156878] [2024-06-28 00:28:49,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099156878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:49,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:49,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:28:49,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898079310] [2024-06-28 00:28:49,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:49,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:28:49,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:49,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:28:49,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:28:49,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 00:28:49,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 337 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:49,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:49,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 00:28:49,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:50,156 INFO L124 PetriNetUnfolderBase]: 442/864 cut-off events. [2024-06-28 00:28:50,156 INFO L125 PetriNetUnfolderBase]: For 1763/1766 co-relation queries the response was YES. [2024-06-28 00:28:50,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2807 conditions, 864 events. 442/864 cut-off events. For 1763/1766 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5048 event pairs, 82 based on Foata normal form. 20/875 useless extension candidates. Maximal degree in co-relation 2782. Up to 478 conditions per place. [2024-06-28 00:28:50,161 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 64 selfloop transitions, 13 changer transitions 9/96 dead transitions. [2024-06-28 00:28:50,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 96 transitions, 639 flow [2024-06-28 00:28:50,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:28:50,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:28:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-28 00:28:50,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-28 00:28:50,163 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 337 flow. Second operand 8 states and 174 transitions. [2024-06-28 00:28:50,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 96 transitions, 639 flow [2024-06-28 00:28:50,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 96 transitions, 619 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-28 00:28:50,167 INFO L231 Difference]: Finished difference. Result has 72 places, 59 transitions, 387 flow [2024-06-28 00:28:50,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=387, PETRI_PLACES=72, PETRI_TRANSITIONS=59} [2024-06-28 00:28:50,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-28 00:28:50,168 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 59 transitions, 387 flow [2024-06-28 00:28:50,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:50,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:50,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:28:50,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:28:50,168 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:50,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:50,169 INFO L85 PathProgramCache]: Analyzing trace with hash 653525783, now seen corresponding path program 2 times [2024-06-28 00:28:50,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:50,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617030056] [2024-06-28 00:28:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:50,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:50,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:50,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617030056] [2024-06-28 00:28:50,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617030056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:50,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:50,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:28:50,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973365931] [2024-06-28 00:28:50,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:50,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:28:50,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:50,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:28:50,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:28:50,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 00:28:50,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 59 transitions, 387 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:50,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:50,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 00:28:50,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:51,320 INFO L124 PetriNetUnfolderBase]: 478/967 cut-off events. [2024-06-28 00:28:51,320 INFO L125 PetriNetUnfolderBase]: For 2497/2500 co-relation queries the response was YES. [2024-06-28 00:28:51,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3136 conditions, 967 events. 478/967 cut-off events. For 2497/2500 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5901 event pairs, 137 based on Foata normal form. 20/975 useless extension candidates. Maximal degree in co-relation 3104. Up to 535 conditions per place. [2024-06-28 00:28:51,326 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2024-06-28 00:28:51,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 89 transitions, 649 flow [2024-06-28 00:28:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:28:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:28:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-28 00:28:51,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272108843537415 [2024-06-28 00:28:51,327 INFO L175 Difference]: Start difference. First operand has 72 places, 59 transitions, 387 flow. Second operand 7 states and 155 transitions. [2024-06-28 00:28:51,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 89 transitions, 649 flow [2024-06-28 00:28:51,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 89 transitions, 617 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 00:28:51,332 INFO L231 Difference]: Finished difference. Result has 73 places, 60 transitions, 413 flow [2024-06-28 00:28:51,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=413, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2024-06-28 00:28:51,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-28 00:28:51,333 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 413 flow [2024-06-28 00:28:51,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:51,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:51,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:28:51,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:28:51,334 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:51,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:51,334 INFO L85 PathProgramCache]: Analyzing trace with hash 910233683, now seen corresponding path program 3 times [2024-06-28 00:28:51,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:51,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045093712] [2024-06-28 00:28:51,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:51,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:52,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:52,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:52,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045093712] [2024-06-28 00:28:52,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045093712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:52,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:52,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:28:52,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035240757] [2024-06-28 00:28:52,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:52,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:28:52,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:52,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:28:52,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:28:52,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 00:28:52,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 60 transitions, 413 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:52,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:52,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 00:28:52,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:52,616 INFO L124 PetriNetUnfolderBase]: 515/1053 cut-off events. [2024-06-28 00:28:52,616 INFO L125 PetriNetUnfolderBase]: For 2450/2453 co-relation queries the response was YES. [2024-06-28 00:28:52,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3387 conditions, 1053 events. 515/1053 cut-off events. For 2450/2453 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6705 event pairs, 62 based on Foata normal form. 12/1057 useless extension candidates. Maximal degree in co-relation 3356. Up to 420 conditions per place. [2024-06-28 00:28:52,625 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 20 changer transitions 0/87 dead transitions. [2024-06-28 00:28:52,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 87 transitions, 669 flow [2024-06-28 00:28:52,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:28:52,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:28:52,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-28 00:28:52,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-28 00:28:52,631 INFO L175 Difference]: Start difference. First operand has 73 places, 60 transitions, 413 flow. Second operand 7 states and 150 transitions. [2024-06-28 00:28:52,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 87 transitions, 669 flow [2024-06-28 00:28:52,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 87 transitions, 625 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 00:28:52,638 INFO L231 Difference]: Finished difference. Result has 75 places, 62 transitions, 431 flow [2024-06-28 00:28:52,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=431, PETRI_PLACES=75, PETRI_TRANSITIONS=62} [2024-06-28 00:28:52,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-28 00:28:52,640 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 62 transitions, 431 flow [2024-06-28 00:28:52,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:52,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:52,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:28:52,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:28:52,642 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:52,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:52,642 INFO L85 PathProgramCache]: Analyzing trace with hash -441511578, now seen corresponding path program 1 times [2024-06-28 00:28:52,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:52,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8411350] [2024-06-28 00:28:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:52,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:53,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:53,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8411350] [2024-06-28 00:28:53,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8411350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:53,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:53,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:28:53,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204677799] [2024-06-28 00:28:53,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:53,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:28:53,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:53,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:28:53,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:28:53,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-28 00:28:53,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 62 transitions, 431 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:53,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:53,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-28 00:28:53,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:53,707 INFO L124 PetriNetUnfolderBase]: 608/1241 cut-off events. [2024-06-28 00:28:53,707 INFO L125 PetriNetUnfolderBase]: For 4071/4074 co-relation queries the response was YES. [2024-06-28 00:28:53,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4150 conditions, 1241 events. 608/1241 cut-off events. For 4071/4074 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8247 event pairs, 198 based on Foata normal form. 27/1245 useless extension candidates. Maximal degree in co-relation 4118. Up to 757 conditions per place. [2024-06-28 00:28:53,718 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 59 selfloop transitions, 14 changer transitions 2/86 dead transitions. [2024-06-28 00:28:53,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 86 transitions, 699 flow [2024-06-28 00:28:53,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:28:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:28:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-28 00:28:53,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-28 00:28:53,720 INFO L175 Difference]: Start difference. First operand has 75 places, 62 transitions, 431 flow. Second operand 5 states and 120 transitions. [2024-06-28 00:28:53,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 86 transitions, 699 flow [2024-06-28 00:28:53,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 86 transitions, 669 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 00:28:53,728 INFO L231 Difference]: Finished difference. Result has 78 places, 64 transitions, 471 flow [2024-06-28 00:28:53,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=471, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2024-06-28 00:28:53,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-28 00:28:53,730 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 471 flow [2024-06-28 00:28:53,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:53,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:53,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:28:53,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:28:53,734 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:53,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:53,734 INFO L85 PathProgramCache]: Analyzing trace with hash 765316872, now seen corresponding path program 2 times [2024-06-28 00:28:53,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:53,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083449301] [2024-06-28 00:28:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:53,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:54,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:54,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083449301] [2024-06-28 00:28:54,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083449301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:54,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:54,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:28:54,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103681960] [2024-06-28 00:28:54,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:54,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:28:54,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:54,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:28:54,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:28:54,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 00:28:54,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 64 transitions, 471 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:54,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:54,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 00:28:54,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:54,762 INFO L124 PetriNetUnfolderBase]: 537/1102 cut-off events. [2024-06-28 00:28:54,763 INFO L125 PetriNetUnfolderBase]: For 3574/3577 co-relation queries the response was YES. [2024-06-28 00:28:54,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3887 conditions, 1102 events. 537/1102 cut-off events. For 3574/3577 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7004 event pairs, 141 based on Foata normal form. 5/1095 useless extension candidates. Maximal degree in co-relation 3852. Up to 752 conditions per place. [2024-06-28 00:28:54,772 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 20 changer transitions 0/90 dead transitions. [2024-06-28 00:28:54,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 90 transitions, 723 flow [2024-06-28 00:28:54,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:28:54,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:28:54,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 00:28:54,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-28 00:28:54,775 INFO L175 Difference]: Start difference. First operand has 78 places, 64 transitions, 471 flow. Second operand 8 states and 160 transitions. [2024-06-28 00:28:54,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 90 transitions, 723 flow [2024-06-28 00:28:54,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 90 transitions, 702 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-28 00:28:54,787 INFO L231 Difference]: Finished difference. Result has 85 places, 66 transitions, 532 flow [2024-06-28 00:28:54,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=532, PETRI_PLACES=85, PETRI_TRANSITIONS=66} [2024-06-28 00:28:54,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-28 00:28:54,789 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 66 transitions, 532 flow [2024-06-28 00:28:54,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:54,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:54,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:28:54,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:28:54,789 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:54,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:54,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1669543662, now seen corresponding path program 1 times [2024-06-28 00:28:54,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:54,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476050735] [2024-06-28 00:28:54,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:54,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:55,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:55,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476050735] [2024-06-28 00:28:55,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476050735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:55,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:55,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:28:55,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388829685] [2024-06-28 00:28:55,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:55,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:28:55,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:55,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:28:55,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:28:55,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-28 00:28:55,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 66 transitions, 532 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:55,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:55,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-28 00:28:55,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:56,000 INFO L124 PetriNetUnfolderBase]: 577/1174 cut-off events. [2024-06-28 00:28:56,000 INFO L125 PetriNetUnfolderBase]: For 4618/4621 co-relation queries the response was YES. [2024-06-28 00:28:56,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4330 conditions, 1174 events. 577/1174 cut-off events. For 4618/4621 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7555 event pairs, 190 based on Foata normal form. 6/1166 useless extension candidates. Maximal degree in co-relation 4293. Up to 840 conditions per place. [2024-06-28 00:28:56,012 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 64 selfloop transitions, 22 changer transitions 0/97 dead transitions. [2024-06-28 00:28:56,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 97 transitions, 838 flow [2024-06-28 00:28:56,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:28:56,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:28:56,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-28 00:28:56,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-28 00:28:56,014 INFO L175 Difference]: Start difference. First operand has 85 places, 66 transitions, 532 flow. Second operand 6 states and 145 transitions. [2024-06-28 00:28:56,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 97 transitions, 838 flow [2024-06-28 00:28:56,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 97 transitions, 795 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 00:28:56,031 INFO L231 Difference]: Finished difference. Result has 85 places, 69 transitions, 580 flow [2024-06-28 00:28:56,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=580, PETRI_PLACES=85, PETRI_TRANSITIONS=69} [2024-06-28 00:28:56,032 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-28 00:28:56,032 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 69 transitions, 580 flow [2024-06-28 00:28:56,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:56,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:56,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:28:56,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:28:56,034 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:56,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:56,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2011910490, now seen corresponding path program 2 times [2024-06-28 00:28:56,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:56,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781412606] [2024-06-28 00:28:56,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:56,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:56,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:56,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781412606] [2024-06-28 00:28:56,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781412606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:56,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:56,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:28:56,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432725742] [2024-06-28 00:28:56,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:56,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:28:56,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:56,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:28:56,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:28:56,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 00:28:56,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 69 transitions, 580 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:56,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:56,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 00:28:56,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:57,195 INFO L124 PetriNetUnfolderBase]: 560/1145 cut-off events. [2024-06-28 00:28:57,195 INFO L125 PetriNetUnfolderBase]: For 4835/4838 co-relation queries the response was YES. [2024-06-28 00:28:57,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4219 conditions, 1145 events. 560/1145 cut-off events. For 4835/4838 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7365 event pairs, 202 based on Foata normal form. 6/1139 useless extension candidates. Maximal degree in co-relation 4183. Up to 883 conditions per place. [2024-06-28 00:28:57,205 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 58 selfloop transitions, 17 changer transitions 0/85 dead transitions. [2024-06-28 00:28:57,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 85 transitions, 771 flow [2024-06-28 00:28:57,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:28:57,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:28:57,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-28 00:28:57,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-28 00:28:57,207 INFO L175 Difference]: Start difference. First operand has 85 places, 69 transitions, 580 flow. Second operand 7 states and 140 transitions. [2024-06-28 00:28:57,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 85 transitions, 771 flow [2024-06-28 00:28:57,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 85 transitions, 724 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-28 00:28:57,217 INFO L231 Difference]: Finished difference. Result has 90 places, 69 transitions, 573 flow [2024-06-28 00:28:57,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=573, PETRI_PLACES=90, PETRI_TRANSITIONS=69} [2024-06-28 00:28:57,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-28 00:28:57,218 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 69 transitions, 573 flow [2024-06-28 00:28:57,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:57,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:57,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:28:57,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:28:57,219 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:57,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:57,220 INFO L85 PathProgramCache]: Analyzing trace with hash -98151055, now seen corresponding path program 1 times [2024-06-28 00:28:57,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:57,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003177309] [2024-06-28 00:28:57,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:57,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:58,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:58,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003177309] [2024-06-28 00:28:58,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003177309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:58,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:58,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:28:58,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074330805] [2024-06-28 00:28:58,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:58,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:28:58,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:58,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:28:58,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:28:58,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 00:28:58,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 69 transitions, 573 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:58,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:58,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 00:28:58,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:58,614 INFO L124 PetriNetUnfolderBase]: 601/1222 cut-off events. [2024-06-28 00:28:58,615 INFO L125 PetriNetUnfolderBase]: For 5433/5436 co-relation queries the response was YES. [2024-06-28 00:28:58,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4523 conditions, 1222 events. 601/1222 cut-off events. For 5433/5436 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7844 event pairs, 215 based on Foata normal form. 8/1217 useless extension candidates. Maximal degree in co-relation 4485. Up to 924 conditions per place. [2024-06-28 00:28:58,624 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 69 selfloop transitions, 18 changer transitions 1/98 dead transitions. [2024-06-28 00:28:58,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 98 transitions, 888 flow [2024-06-28 00:28:58,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:28:58,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:28:58,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 00:28:58,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-28 00:28:58,625 INFO L175 Difference]: Start difference. First operand has 90 places, 69 transitions, 573 flow. Second operand 9 states and 177 transitions. [2024-06-28 00:28:58,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 98 transitions, 888 flow [2024-06-28 00:28:58,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 98 transitions, 821 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 00:28:58,636 INFO L231 Difference]: Finished difference. Result has 94 places, 74 transitions, 636 flow [2024-06-28 00:28:58,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=636, PETRI_PLACES=94, PETRI_TRANSITIONS=74} [2024-06-28 00:28:58,637 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-28 00:28:58,637 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 74 transitions, 636 flow [2024-06-28 00:28:58,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:58,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:58,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:28:58,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:28:58,638 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:58,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:58,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1760272001, now seen corresponding path program 1 times [2024-06-28 00:28:58,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:58,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452692918] [2024-06-28 00:28:58,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:58,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:59,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:59,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452692918] [2024-06-28 00:28:59,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452692918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:59,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:59,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:28:59,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954259870] [2024-06-28 00:28:59,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:59,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:28:59,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:59,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:28:59,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:28:59,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 00:28:59,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 74 transitions, 636 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:59,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:59,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 00:28:59,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:59,993 INFO L124 PetriNetUnfolderBase]: 589/1208 cut-off events. [2024-06-28 00:28:59,994 INFO L125 PetriNetUnfolderBase]: For 5316/5319 co-relation queries the response was YES. [2024-06-28 00:28:59,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4454 conditions, 1208 events. 589/1208 cut-off events. For 5316/5319 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7833 event pairs, 227 based on Foata normal form. 4/1199 useless extension candidates. Maximal degree in co-relation 4413. Up to 916 conditions per place. [2024-06-28 00:29:00,005 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 62 selfloop transitions, 19 changer transitions 0/91 dead transitions. [2024-06-28 00:29:00,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 91 transitions, 853 flow [2024-06-28 00:29:00,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:29:00,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:29:00,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-28 00:29:00,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-28 00:29:00,006 INFO L175 Difference]: Start difference. First operand has 94 places, 74 transitions, 636 flow. Second operand 7 states and 140 transitions. [2024-06-28 00:29:00,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 91 transitions, 853 flow [2024-06-28 00:29:00,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 91 transitions, 800 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-28 00:29:00,019 INFO L231 Difference]: Finished difference. Result has 98 places, 75 transitions, 653 flow [2024-06-28 00:29:00,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=653, PETRI_PLACES=98, PETRI_TRANSITIONS=75} [2024-06-28 00:29:00,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-28 00:29:00,020 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 75 transitions, 653 flow [2024-06-28 00:29:00,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:00,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:00,021 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] [2024-06-28 00:29:00,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:29:00,021 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:00,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:00,022 INFO L85 PathProgramCache]: Analyzing trace with hash 769521568, now seen corresponding path program 1 times [2024-06-28 00:29:00,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:00,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896832534] [2024-06-28 00:29:00,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:00,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:01,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:01,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896832534] [2024-06-28 00:29:01,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896832534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:01,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:01,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:29:01,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908956400] [2024-06-28 00:29:01,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:01,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:29:01,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:01,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:29:01,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:29:01,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-28 00:29:01,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 75 transitions, 653 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:01,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:01,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-28 00:29:01,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:01,509 INFO L124 PetriNetUnfolderBase]: 649/1319 cut-off events. [2024-06-28 00:29:01,510 INFO L125 PetriNetUnfolderBase]: For 8042/8045 co-relation queries the response was YES. [2024-06-28 00:29:01,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4838 conditions, 1319 events. 649/1319 cut-off events. For 8042/8045 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8725 event pairs, 212 based on Foata normal form. 22/1323 useless extension candidates. Maximal degree in co-relation 4795. Up to 635 conditions per place. [2024-06-28 00:29:01,522 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 71 selfloop transitions, 17 changer transitions 10/109 dead transitions. [2024-06-28 00:29:01,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 109 transitions, 998 flow [2024-06-28 00:29:01,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:29:01,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:29:01,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-28 00:29:01,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-28 00:29:01,524 INFO L175 Difference]: Start difference. First operand has 98 places, 75 transitions, 653 flow. Second operand 6 states and 149 transitions. [2024-06-28 00:29:01,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 109 transitions, 998 flow [2024-06-28 00:29:01,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 109 transitions, 956 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 00:29:01,535 INFO L231 Difference]: Finished difference. Result has 100 places, 71 transitions, 619 flow [2024-06-28 00:29:01,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=619, PETRI_PLACES=100, PETRI_TRANSITIONS=71} [2024-06-28 00:29:01,537 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-28 00:29:01,537 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 71 transitions, 619 flow [2024-06-28 00:29:01,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:01,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:01,537 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] [2024-06-28 00:29:01,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:29:01,537 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:01,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:01,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1865067496, now seen corresponding path program 2 times [2024-06-28 00:29:01,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:01,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196784751] [2024-06-28 00:29:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:01,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:02,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:02,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196784751] [2024-06-28 00:29:02,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196784751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:02,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:02,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:29:02,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379596965] [2024-06-28 00:29:02,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:02,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:29:02,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:02,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:29:02,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:29:02,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-28 00:29:02,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 71 transitions, 619 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:02,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:02,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-28 00:29:02,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:03,100 INFO L124 PetriNetUnfolderBase]: 650/1338 cut-off events. [2024-06-28 00:29:03,100 INFO L125 PetriNetUnfolderBase]: For 9649/9652 co-relation queries the response was YES. [2024-06-28 00:29:03,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5036 conditions, 1338 events. 650/1338 cut-off events. For 9649/9652 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8869 event pairs, 169 based on Foata normal form. 18/1337 useless extension candidates. Maximal degree in co-relation 4993. Up to 531 conditions per place. [2024-06-28 00:29:03,111 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 71 selfloop transitions, 23 changer transitions 5/110 dead transitions. [2024-06-28 00:29:03,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 110 transitions, 1018 flow [2024-06-28 00:29:03,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:29:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:29:03,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-28 00:29:03,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-28 00:29:03,114 INFO L175 Difference]: Start difference. First operand has 100 places, 71 transitions, 619 flow. Second operand 7 states and 166 transitions. [2024-06-28 00:29:03,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 110 transitions, 1018 flow [2024-06-28 00:29:03,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 110 transitions, 974 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 00:29:03,133 INFO L231 Difference]: Finished difference. Result has 102 places, 71 transitions, 666 flow [2024-06-28 00:29:03,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=666, PETRI_PLACES=102, PETRI_TRANSITIONS=71} [2024-06-28 00:29:03,134 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-28 00:29:03,134 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 71 transitions, 666 flow [2024-06-28 00:29:03,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:03,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:03,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:29:03,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:29:03,135 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:03,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:03,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1505782330, now seen corresponding path program 1 times [2024-06-28 00:29:03,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:03,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072858808] [2024-06-28 00:29:03,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:03,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:04,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:04,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072858808] [2024-06-28 00:29:04,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072858808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:04,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:04,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:29:04,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166898094] [2024-06-28 00:29:04,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:04,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:29:04,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:04,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:29:04,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:29:04,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 00:29:04,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 71 transitions, 666 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:04,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:04,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 00:29:04,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:05,052 INFO L124 PetriNetUnfolderBase]: 672/1439 cut-off events. [2024-06-28 00:29:05,052 INFO L125 PetriNetUnfolderBase]: For 10215/10218 co-relation queries the response was YES. [2024-06-28 00:29:05,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5427 conditions, 1439 events. 672/1439 cut-off events. For 10215/10218 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10121 event pairs, 165 based on Foata normal form. 14/1423 useless extension candidates. Maximal degree in co-relation 5382. Up to 640 conditions per place. [2024-06-28 00:29:05,064 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 24 changer transitions 7/101 dead transitions. [2024-06-28 00:29:05,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 101 transitions, 954 flow [2024-06-28 00:29:05,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:29:05,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:29:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-28 00:29:05,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 00:29:05,066 INFO L175 Difference]: Start difference. First operand has 102 places, 71 transitions, 666 flow. Second operand 8 states and 168 transitions. [2024-06-28 00:29:05,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 101 transitions, 954 flow [2024-06-28 00:29:05,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 101 transitions, 844 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-28 00:29:05,088 INFO L231 Difference]: Finished difference. Result has 100 places, 68 transitions, 570 flow [2024-06-28 00:29:05,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=570, PETRI_PLACES=100, PETRI_TRANSITIONS=68} [2024-06-28 00:29:05,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-28 00:29:05,089 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 68 transitions, 570 flow [2024-06-28 00:29:05,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:05,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:05,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:29:05,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:29:05,090 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:05,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:05,090 INFO L85 PathProgramCache]: Analyzing trace with hash 337842516, now seen corresponding path program 2 times [2024-06-28 00:29:05,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:05,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968017593] [2024-06-28 00:29:05,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:05,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:06,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:06,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968017593] [2024-06-28 00:29:06,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968017593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:06,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:06,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:29:06,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590264713] [2024-06-28 00:29:06,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:06,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:29:06,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:06,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:29:06,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:29:06,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 00:29:06,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 68 transitions, 570 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:06,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:06,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 00:29:06,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:06,654 INFO L124 PetriNetUnfolderBase]: 552/1188 cut-off events. [2024-06-28 00:29:06,654 INFO L125 PetriNetUnfolderBase]: For 8195/8198 co-relation queries the response was YES. [2024-06-28 00:29:06,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4330 conditions, 1188 events. 552/1188 cut-off events. For 8195/8198 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8040 event pairs, 225 based on Foata normal form. 4/1171 useless extension candidates. Maximal degree in co-relation 4286. Up to 724 conditions per place. [2024-06-28 00:29:06,661 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 70 selfloop transitions, 16 changer transitions 1/97 dead transitions. [2024-06-28 00:29:06,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 97 transitions, 814 flow [2024-06-28 00:29:06,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:29:06,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:29:06,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-28 00:29:06,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-28 00:29:06,662 INFO L175 Difference]: Start difference. First operand has 100 places, 68 transitions, 570 flow. Second operand 8 states and 165 transitions. [2024-06-28 00:29:06,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 97 transitions, 814 flow [2024-06-28 00:29:06,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 97 transitions, 752 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-28 00:29:06,676 INFO L231 Difference]: Finished difference. Result has 98 places, 68 transitions, 546 flow [2024-06-28 00:29:06,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=546, PETRI_PLACES=98, PETRI_TRANSITIONS=68} [2024-06-28 00:29:06,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-28 00:29:06,676 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 68 transitions, 546 flow [2024-06-28 00:29:06,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:06,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:06,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:29:06,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:29:06,677 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:06,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:06,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1878415200, now seen corresponding path program 3 times [2024-06-28 00:29:06,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:06,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308815650] [2024-06-28 00:29:06,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:06,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:08,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:08,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308815650] [2024-06-28 00:29:08,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308815650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:08,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:08,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:29:08,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359781789] [2024-06-28 00:29:08,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:08,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:29:08,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:08,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:29:08,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:29:08,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 00:29:08,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 68 transitions, 546 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:08,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:08,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 00:29:08,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:08,684 INFO L124 PetriNetUnfolderBase]: 516/1106 cut-off events. [2024-06-28 00:29:08,684 INFO L125 PetriNetUnfolderBase]: For 7205/7208 co-relation queries the response was YES. [2024-06-28 00:29:08,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3882 conditions, 1106 events. 516/1106 cut-off events. For 7205/7208 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7301 event pairs, 133 based on Foata normal form. 12/1103 useless extension candidates. Maximal degree in co-relation 3839. Up to 291 conditions per place. [2024-06-28 00:29:08,692 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 72 selfloop transitions, 22 changer transitions 5/109 dead transitions. [2024-06-28 00:29:08,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 109 transitions, 888 flow [2024-06-28 00:29:08,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:29:08,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:29:08,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-28 00:29:08,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132275132275133 [2024-06-28 00:29:08,694 INFO L175 Difference]: Start difference. First operand has 98 places, 68 transitions, 546 flow. Second operand 9 states and 194 transitions. [2024-06-28 00:29:08,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 109 transitions, 888 flow [2024-06-28 00:29:08,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 109 transitions, 858 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 00:29:08,705 INFO L231 Difference]: Finished difference. Result has 101 places, 66 transitions, 549 flow [2024-06-28 00:29:08,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=549, PETRI_PLACES=101, PETRI_TRANSITIONS=66} [2024-06-28 00:29:08,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-28 00:29:08,705 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 66 transitions, 549 flow [2024-06-28 00:29:08,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:08,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:08,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:29:08,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:29:08,706 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:08,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:08,707 INFO L85 PathProgramCache]: Analyzing trace with hash 450674821, now seen corresponding path program 1 times [2024-06-28 00:29:08,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:08,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782142954] [2024-06-28 00:29:08,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:08,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:10,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:10,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782142954] [2024-06-28 00:29:10,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782142954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:10,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:10,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:29:10,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116236586] [2024-06-28 00:29:10,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:10,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:29:10,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:10,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:29:10,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:29:10,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-28 00:29:10,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 66 transitions, 549 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:10,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:10,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-28 00:29:10,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:10,393 INFO L124 PetriNetUnfolderBase]: 438/952 cut-off events. [2024-06-28 00:29:10,394 INFO L125 PetriNetUnfolderBase]: For 7124/7127 co-relation queries the response was YES. [2024-06-28 00:29:10,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3456 conditions, 952 events. 438/952 cut-off events. For 7124/7127 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6045 event pairs, 125 based on Foata normal form. 12/951 useless extension candidates. Maximal degree in co-relation 3413. Up to 237 conditions per place. [2024-06-28 00:29:10,414 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 68 selfloop transitions, 15 changer transitions 7/101 dead transitions. [2024-06-28 00:29:10,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 101 transitions, 899 flow [2024-06-28 00:29:10,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:29:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:29:10,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-28 00:29:10,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-28 00:29:10,420 INFO L175 Difference]: Start difference. First operand has 101 places, 66 transitions, 549 flow. Second operand 7 states and 166 transitions. [2024-06-28 00:29:10,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 101 transitions, 899 flow [2024-06-28 00:29:10,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 101 transitions, 860 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-28 00:29:10,458 INFO L231 Difference]: Finished difference. Result has 100 places, 61 transitions, 498 flow [2024-06-28 00:29:10,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=498, PETRI_PLACES=100, PETRI_TRANSITIONS=61} [2024-06-28 00:29:10,458 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-28 00:29:10,459 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 61 transitions, 498 flow [2024-06-28 00:29:10,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:10,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:10,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:29:10,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:29:10,461 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:10,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:10,461 INFO L85 PathProgramCache]: Analyzing trace with hash 62329389, now seen corresponding path program 2 times [2024-06-28 00:29:10,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:10,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141797138] [2024-06-28 00:29:10,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:10,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:11,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:11,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141797138] [2024-06-28 00:29:11,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141797138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:11,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:11,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:29:11,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072478685] [2024-06-28 00:29:11,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:11,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:29:11,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:11,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:29:11,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:29:11,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 00:29:11,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 61 transitions, 498 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:11,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:11,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 00:29:11,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:11,942 INFO L124 PetriNetUnfolderBase]: 403/889 cut-off events. [2024-06-28 00:29:11,943 INFO L125 PetriNetUnfolderBase]: For 5702/5705 co-relation queries the response was YES. [2024-06-28 00:29:11,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3192 conditions, 889 events. 403/889 cut-off events. For 5702/5705 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5671 event pairs, 112 based on Foata normal form. 6/884 useless extension candidates. Maximal degree in co-relation 3149. Up to 490 conditions per place. [2024-06-28 00:29:11,947 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 19 changer transitions 1/84 dead transitions. [2024-06-28 00:29:11,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 84 transitions, 714 flow [2024-06-28 00:29:11,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:29:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:29:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-28 00:29:11,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198412698412699 [2024-06-28 00:29:11,949 INFO L175 Difference]: Start difference. First operand has 100 places, 61 transitions, 498 flow. Second operand 6 states and 131 transitions. [2024-06-28 00:29:11,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 84 transitions, 714 flow [2024-06-28 00:29:11,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 84 transitions, 635 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-28 00:29:11,959 INFO L231 Difference]: Finished difference. Result has 95 places, 61 transitions, 463 flow [2024-06-28 00:29:11,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=463, PETRI_PLACES=95, PETRI_TRANSITIONS=61} [2024-06-28 00:29:11,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-28 00:29:11,959 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 61 transitions, 463 flow [2024-06-28 00:29:11,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:11,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:11,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:29:11,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:29:11,960 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:11,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:11,960 INFO L85 PathProgramCache]: Analyzing trace with hash -2012737199, now seen corresponding path program 3 times [2024-06-28 00:29:11,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:11,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963896840] [2024-06-28 00:29:11,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:11,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:13,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:13,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963896840] [2024-06-28 00:29:13,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963896840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:13,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:13,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:29:13,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646869329] [2024-06-28 00:29:13,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:13,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:29:13,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:13,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:29:13,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:29:13,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 00:29:13,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 61 transitions, 463 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:13,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:13,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 00:29:13,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:13,364 INFO L124 PetriNetUnfolderBase]: 333/740 cut-off events. [2024-06-28 00:29:13,364 INFO L125 PetriNetUnfolderBase]: For 3606/3609 co-relation queries the response was YES. [2024-06-28 00:29:13,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2497 conditions, 740 events. 333/740 cut-off events. For 3606/3609 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4529 event pairs, 79 based on Foata normal form. 6/729 useless extension candidates. Maximal degree in co-relation 2455. Up to 370 conditions per place. [2024-06-28 00:29:13,368 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 49 selfloop transitions, 18 changer transitions 0/77 dead transitions. [2024-06-28 00:29:13,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 77 transitions, 633 flow [2024-06-28 00:29:13,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:29:13,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:29:13,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-28 00:29:13,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-28 00:29:13,370 INFO L175 Difference]: Start difference. First operand has 95 places, 61 transitions, 463 flow. Second operand 7 states and 138 transitions. [2024-06-28 00:29:13,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 77 transitions, 633 flow [2024-06-28 00:29:13,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 77 transitions, 577 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 00:29:13,376 INFO L231 Difference]: Finished difference. Result has 97 places, 61 transitions, 458 flow [2024-06-28 00:29:13,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=458, PETRI_PLACES=97, PETRI_TRANSITIONS=61} [2024-06-28 00:29:13,377 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-28 00:29:13,377 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 61 transitions, 458 flow [2024-06-28 00:29:13,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:13,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:13,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:29:13,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:29:13,378 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:13,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:13,378 INFO L85 PathProgramCache]: Analyzing trace with hash -805122149, now seen corresponding path program 1 times [2024-06-28 00:29:13,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:13,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652602740] [2024-06-28 00:29:13,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:13,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:14,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:14,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652602740] [2024-06-28 00:29:14,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652602740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:14,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:14,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:29:14,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326673737] [2024-06-28 00:29:14,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:14,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:29:14,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:14,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:29:14,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:29:14,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 00:29:14,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 61 transitions, 458 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:14,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:14,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 00:29:14,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:14,854 INFO L124 PetriNetUnfolderBase]: 369/839 cut-off events. [2024-06-28 00:29:14,855 INFO L125 PetriNetUnfolderBase]: For 4132/4135 co-relation queries the response was YES. [2024-06-28 00:29:14,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2720 conditions, 839 events. 369/839 cut-off events. For 4132/4135 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5334 event pairs, 139 based on Foata normal form. 10/839 useless extension candidates. Maximal degree in co-relation 2678. Up to 545 conditions per place. [2024-06-28 00:29:14,859 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 51 selfloop transitions, 8 changer transitions 22/91 dead transitions. [2024-06-28 00:29:14,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 91 transitions, 723 flow [2024-06-28 00:29:14,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:29:14,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:29:14,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-28 00:29:14,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-28 00:29:14,861 INFO L175 Difference]: Start difference. First operand has 97 places, 61 transitions, 458 flow. Second operand 10 states and 190 transitions. [2024-06-28 00:29:14,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 91 transitions, 723 flow [2024-06-28 00:29:14,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 91 transitions, 662 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 00:29:14,868 INFO L231 Difference]: Finished difference. Result has 101 places, 59 transitions, 409 flow [2024-06-28 00:29:14,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=409, PETRI_PLACES=101, PETRI_TRANSITIONS=59} [2024-06-28 00:29:14,898 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-28 00:29:14,898 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 59 transitions, 409 flow [2024-06-28 00:29:14,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:14,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:14,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:29:14,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:29:14,899 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:14,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:14,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1720257527, now seen corresponding path program 2 times [2024-06-28 00:29:14,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:14,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374600119] [2024-06-28 00:29:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:14,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:16,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:16,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374600119] [2024-06-28 00:29:16,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374600119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:16,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:16,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:29:16,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948527632] [2024-06-28 00:29:16,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:16,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:29:16,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:16,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:29:16,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:29:16,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-28 00:29:16,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 59 transitions, 409 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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) [2024-06-28 00:29:16,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:16,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-28 00:29:16,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:16,673 INFO L124 PetriNetUnfolderBase]: 359/800 cut-off events. [2024-06-28 00:29:16,673 INFO L125 PetriNetUnfolderBase]: For 3642/3643 co-relation queries the response was YES. [2024-06-28 00:29:16,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2503 conditions, 800 events. 359/800 cut-off events. For 3642/3643 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4947 event pairs, 91 based on Foata normal form. 8/800 useless extension candidates. Maximal degree in co-relation 2461. Up to 190 conditions per place. [2024-06-28 00:29:16,677 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 49 selfloop transitions, 12 changer transitions 14/86 dead transitions. [2024-06-28 00:29:16,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 86 transitions, 647 flow [2024-06-28 00:29:16,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:29:16,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:29:16,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-28 00:29:16,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-28 00:29:16,679 INFO L175 Difference]: Start difference. First operand has 101 places, 59 transitions, 409 flow. Second operand 6 states and 143 transitions. [2024-06-28 00:29:16,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 86 transitions, 647 flow [2024-06-28 00:29:16,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 86 transitions, 616 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-28 00:29:16,686 INFO L231 Difference]: Finished difference. Result has 93 places, 53 transitions, 363 flow [2024-06-28 00:29:16,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=363, PETRI_PLACES=93, PETRI_TRANSITIONS=53} [2024-06-28 00:29:16,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-28 00:29:16,686 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 53 transitions, 363 flow [2024-06-28 00:29:16,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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) [2024-06-28 00:29:16,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:16,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:29:16,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:29:16,687 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:16,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:16,687 INFO L85 PathProgramCache]: Analyzing trace with hash 723127165, now seen corresponding path program 3 times [2024-06-28 00:29:16,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:16,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309503162] [2024-06-28 00:29:16,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:16,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:18,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:18,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309503162] [2024-06-28 00:29:18,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309503162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:18,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:18,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:29:18,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054600121] [2024-06-28 00:29:18,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:18,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:29:18,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:18,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:29:18,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:29:18,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-28 00:29:18,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 53 transitions, 363 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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) [2024-06-28 00:29:18,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:18,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-28 00:29:18,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:18,407 INFO L124 PetriNetUnfolderBase]: 281/629 cut-off events. [2024-06-28 00:29:18,407 INFO L125 PetriNetUnfolderBase]: For 3632/3633 co-relation queries the response was YES. [2024-06-28 00:29:18,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2074 conditions, 629 events. 281/629 cut-off events. For 3632/3633 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3676 event pairs, 95 based on Foata normal form. 8/630 useless extension candidates. Maximal degree in co-relation 2038. Up to 236 conditions per place. [2024-06-28 00:29:18,410 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 39 selfloop transitions, 8 changer transitions 21/79 dead transitions. [2024-06-28 00:29:18,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 79 transitions, 557 flow [2024-06-28 00:29:18,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:29:18,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:29:18,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-28 00:29:18,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272108843537415 [2024-06-28 00:29:18,411 INFO L175 Difference]: Start difference. First operand has 93 places, 53 transitions, 363 flow. Second operand 7 states and 155 transitions. [2024-06-28 00:29:18,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 79 transitions, 557 flow [2024-06-28 00:29:18,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 79 transitions, 505 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-28 00:29:18,415 INFO L231 Difference]: Finished difference. Result has 87 places, 49 transitions, 299 flow [2024-06-28 00:29:18,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=299, PETRI_PLACES=87, PETRI_TRANSITIONS=49} [2024-06-28 00:29:18,416 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-28 00:29:18,416 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 49 transitions, 299 flow [2024-06-28 00:29:18,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 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) [2024-06-28 00:29:18,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:18,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:29:18,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:29:18,417 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:18,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:18,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1202937577, now seen corresponding path program 4 times [2024-06-28 00:29:18,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:18,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206117705] [2024-06-28 00:29:18,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:18,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:20,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:20,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206117705] [2024-06-28 00:29:20,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206117705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:20,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:20,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:29:20,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177345303] [2024-06-28 00:29:20,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:20,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:29:20,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:20,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:29:20,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:29:20,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 00:29:20,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 49 transitions, 299 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:20,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:20,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 00:29:20,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:20,426 INFO L124 PetriNetUnfolderBase]: 219/491 cut-off events. [2024-06-28 00:29:20,426 INFO L125 PetriNetUnfolderBase]: For 2526/2527 co-relation queries the response was YES. [2024-06-28 00:29:20,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1581 conditions, 491 events. 219/491 cut-off events. For 2526/2527 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2725 event pairs, 71 based on Foata normal form. 8/488 useless extension candidates. Maximal degree in co-relation 1548. Up to 135 conditions per place. [2024-06-28 00:29:20,430 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 37 selfloop transitions, 7 changer transitions 16/70 dead transitions. [2024-06-28 00:29:20,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 70 transitions, 485 flow [2024-06-28 00:29:20,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:29:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:29:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 00:29:20,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-28 00:29:20,431 INFO L175 Difference]: Start difference. First operand has 87 places, 49 transitions, 299 flow. Second operand 8 states and 155 transitions. [2024-06-28 00:29:20,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 70 transitions, 485 flow [2024-06-28 00:29:20,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 70 transitions, 443 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-28 00:29:20,435 INFO L231 Difference]: Finished difference. Result has 82 places, 44 transitions, 245 flow [2024-06-28 00:29:20,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=245, PETRI_PLACES=82, PETRI_TRANSITIONS=44} [2024-06-28 00:29:20,436 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-28 00:29:20,436 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 44 transitions, 245 flow [2024-06-28 00:29:20,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:20,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:20,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:29:20,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:29:20,438 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:20,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:20,438 INFO L85 PathProgramCache]: Analyzing trace with hash -416955245, now seen corresponding path program 5 times [2024-06-28 00:29:20,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:20,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119244938] [2024-06-28 00:29:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:20,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:21,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:21,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119244938] [2024-06-28 00:29:21,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119244938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:21,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:21,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:29:21,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295309586] [2024-06-28 00:29:21,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:21,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:29:21,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:21,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:29:21,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:29:21,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 00:29:21,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 44 transitions, 245 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:21,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:21,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 00:29:21,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:21,953 INFO L124 PetriNetUnfolderBase]: 167/382 cut-off events. [2024-06-28 00:29:21,954 INFO L125 PetriNetUnfolderBase]: For 1371/1372 co-relation queries the response was YES. [2024-06-28 00:29:21,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1162 conditions, 382 events. 167/382 cut-off events. For 1371/1372 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1891 event pairs, 50 based on Foata normal form. 9/385 useless extension candidates. Maximal degree in co-relation 1143. Up to 135 conditions per place. [2024-06-28 00:29:21,955 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 21 selfloop transitions, 5 changer transitions 34/70 dead transitions. [2024-06-28 00:29:21,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 70 transitions, 437 flow [2024-06-28 00:29:21,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:29:21,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:29:21,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-28 00:29:21,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 00:29:21,978 INFO L175 Difference]: Start difference. First operand has 82 places, 44 transitions, 245 flow. Second operand 10 states and 185 transitions. [2024-06-28 00:29:21,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 70 transitions, 437 flow [2024-06-28 00:29:21,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 70 transitions, 417 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 00:29:21,981 INFO L231 Difference]: Finished difference. Result has 79 places, 34 transitions, 145 flow [2024-06-28 00:29:21,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=145, PETRI_PLACES=79, PETRI_TRANSITIONS=34} [2024-06-28 00:29:21,982 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-28 00:29:21,982 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 34 transitions, 145 flow [2024-06-28 00:29:21,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:21,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:21,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:29:21,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:29:21,983 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:21,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:21,983 INFO L85 PathProgramCache]: Analyzing trace with hash -153347915, now seen corresponding path program 6 times [2024-06-28 00:29:21,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:21,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200455478] [2024-06-28 00:29:21,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:21,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:23,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:23,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200455478] [2024-06-28 00:29:23,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200455478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:23,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:23,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:29:23,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689848265] [2024-06-28 00:29:23,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:23,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:29:23,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:23,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:29:23,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:29:23,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 00:29:23,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 34 transitions, 145 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:23,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:23,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 00:29:23,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:23,591 INFO L124 PetriNetUnfolderBase]: 95/222 cut-off events. [2024-06-28 00:29:23,591 INFO L125 PetriNetUnfolderBase]: For 347/347 co-relation queries the response was YES. [2024-06-28 00:29:23,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581 conditions, 222 events. 95/222 cut-off events. For 347/347 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 955 event pairs, 8 based on Foata normal form. 8/229 useless extension candidates. Maximal degree in co-relation 564. Up to 61 conditions per place. [2024-06-28 00:29:23,592 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 22 selfloop transitions, 6 changer transitions 10/48 dead transitions. [2024-06-28 00:29:23,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 48 transitions, 249 flow [2024-06-28 00:29:23,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:29:23,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:29:23,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-28 00:29:23,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-28 00:29:23,602 INFO L175 Difference]: Start difference. First operand has 79 places, 34 transitions, 145 flow. Second operand 9 states and 155 transitions. [2024-06-28 00:29:23,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 48 transitions, 249 flow [2024-06-28 00:29:23,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 48 transitions, 217 flow, removed 3 selfloop flow, removed 15 redundant places. [2024-06-28 00:29:23,603 INFO L231 Difference]: Finished difference. Result has 61 places, 31 transitions, 109 flow [2024-06-28 00:29:23,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=109, PETRI_PLACES=61, PETRI_TRANSITIONS=31} [2024-06-28 00:29:23,606 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-28 00:29:23,606 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 31 transitions, 109 flow [2024-06-28 00:29:23,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:23,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:29:23,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:29:23,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:29:23,607 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:29:23,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:29:23,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1808376897, now seen corresponding path program 7 times [2024-06-28 00:29:23,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:29:23,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39499535] [2024-06-28 00:29:23,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:29:23,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:29:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:29:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:29:24,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:29:24,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39499535] [2024-06-28 00:29:24,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39499535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:29:24,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:29:24,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:29:24,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59683720] [2024-06-28 00:29:24,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:29:24,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:29:24,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:29:24,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:29:24,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:29:24,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-28 00:29:24,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 31 transitions, 109 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:24,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:29:24,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-28 00:29:24,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:29:25,132 INFO L124 PetriNetUnfolderBase]: 47/122 cut-off events. [2024-06-28 00:29:25,132 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-06-28 00:29:25,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 122 events. 47/122 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 366 event pairs, 0 based on Foata normal form. 8/129 useless extension candidates. Maximal degree in co-relation 295. Up to 40 conditions per place. [2024-06-28 00:29:25,133 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 0 selfloop transitions, 0 changer transitions 39/39 dead transitions. [2024-06-28 00:29:25,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 39 transitions, 175 flow [2024-06-28 00:29:25,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:29:25,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:29:25,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-28 00:29:25,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-28 00:29:25,134 INFO L175 Difference]: Start difference. First operand has 61 places, 31 transitions, 109 flow. Second operand 9 states and 147 transitions. [2024-06-28 00:29:25,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 39 transitions, 175 flow [2024-06-28 00:29:25,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 00:29:25,135 INFO L231 Difference]: Finished difference. Result has 56 places, 0 transitions, 0 flow [2024-06-28 00:29:25,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=56, PETRI_TRANSITIONS=0} [2024-06-28 00:29:25,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-28 00:29:25,136 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 0 transitions, 0 flow [2024-06-28 00:29:25,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:29:25,138 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-28 00:29:25,139 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-28 00:29:25,139 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-28 00:29:25,139 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-28 00:29:25,140 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-28 00:29:25,140 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-28 00:29:25,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:29:25,140 INFO L445 BasicCegarLoop]: Path program histogram: [7, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-06-28 00:29:25,142 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-28 00:29:25,143 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-28 00:29:25,145 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-28 00:29:25,146 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-28 00:29:25,146 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.06 12:29:25 BasicIcfg [2024-06-28 00:29:25,146 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-28 00:29:25,147 INFO L158 Benchmark]: Toolchain (without parser) took 42613.17ms. Allocated memory was 123.7MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 82.5MB in the beginning and 1.0GB in the end (delta: -940.0MB). Peak memory consumption was 88.5MB. Max. memory is 16.1GB. [2024-06-28 00:29:25,147 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 123.7MB. Free memory was 91.8MB in the beginning and 91.7MB in the end (delta: 142.7kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 00:29:25,147 INFO L158 Benchmark]: Witness Parser took 0.41ms. Allocated memory is still 123.7MB. Free memory is still 85.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 00:29:25,147 INFO L158 Benchmark]: CACSL2BoogieTranslator took 602.48ms. Allocated memory is still 123.7MB. Free memory was 82.5MB in the beginning and 50.1MB in the end (delta: 32.4MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2024-06-28 00:29:25,148 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.23ms. Allocated memory is still 123.7MB. Free memory was 50.1MB in the beginning and 46.4MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-28 00:29:25,148 INFO L158 Benchmark]: Boogie Preprocessor took 178.35ms. Allocated memory is still 123.7MB. Free memory was 46.4MB in the beginning and 91.2MB in the end (delta: -44.8MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. [2024-06-28 00:29:25,148 INFO L158 Benchmark]: RCFGBuilder took 995.99ms. Allocated memory was 123.7MB in the beginning and 165.7MB in the end (delta: 41.9MB). Free memory was 91.2MB in the beginning and 62.5MB in the end (delta: 28.7MB). Peak memory consumption was 72.8MB. Max. memory is 16.1GB. [2024-06-28 00:29:25,148 INFO L158 Benchmark]: TraceAbstraction took 40777.79ms. Allocated memory was 165.7MB in the beginning and 1.2GB in the end (delta: 987.8MB). Free memory was 62.5MB in the beginning and 1.0GB in the end (delta: -960.0MB). Peak memory consumption was 27.7MB. Max. memory is 16.1GB. [2024-06-28 00:29:25,149 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 123.7MB. Free memory was 91.8MB in the beginning and 91.7MB in the end (delta: 142.7kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.41ms. Allocated memory is still 123.7MB. Free memory is still 85.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 602.48ms. Allocated memory is still 123.7MB. Free memory was 82.5MB in the beginning and 50.1MB in the end (delta: 32.4MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.23ms. Allocated memory is still 123.7MB. Free memory was 50.1MB in the beginning and 46.4MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 178.35ms. Allocated memory is still 123.7MB. Free memory was 46.4MB in the beginning and 91.2MB in the end (delta: -44.8MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. * RCFGBuilder took 995.99ms. Allocated memory was 123.7MB in the beginning and 165.7MB in the end (delta: 41.9MB). Free memory was 91.2MB in the beginning and 62.5MB in the end (delta: 28.7MB). Peak memory consumption was 72.8MB. Max. memory is 16.1GB. * TraceAbstraction took 40777.79ms. Allocated memory was 165.7MB in the beginning and 1.2GB in the end (delta: 987.8MB). Free memory was 62.5MB in the beginning and 1.0GB in the end (delta: -960.0MB). Peak memory consumption was 27.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 862]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 864]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 865]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 67 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 40.6s, OverallIterations: 29, TraceHistogramMax: 1, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 10.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 841 SdHoareTripleChecker+Valid, 4.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 829 mSDsluCounter, 30 SdHoareTripleChecker+Invalid, 4.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 12 mSDsCounter, 258 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5449 IncrementalHoareTripleChecker+Invalid, 5707 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 258 mSolverCounterUnsat, 18 mSDtfsCounter, 5449 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 211 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=666occurred in iteration=16, InterpolantAutomatonStates: 205, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 28.6s InterpolantComputationTime, 560 NumberOfCodeBlocks, 560 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 531 ConstructedInterpolants, 0 QuantifiedInterpolants, 15093 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 29 InterpolantComputations, 29 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-28 00:29:25,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE