./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix042.opt.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/mix042.opt.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/mix042.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix042.opt.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 [2024-06-27 23:50:22,702 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 23:50:22,787 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 23:50:22,790 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 23:50:22,790 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 23:50:22,833 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 23:50:22,833 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 23:50:22,834 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 23:50:22,844 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 23:50:22,844 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 23:50:22,845 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 23:50:22,845 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 23:50:22,845 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 23:50:22,845 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 23:50:22,846 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 23:50:22,846 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 23:50:22,846 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 23:50:22,846 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 23:50:22,846 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 23:50:22,847 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 23:50:22,847 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 23:50:22,847 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 23:50:22,847 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 23:50:22,847 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 23:50:22,848 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 23:50:22,848 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 23:50:22,848 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 23:50:22,848 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 23:50:22,848 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 23:50:22,849 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 23:50:22,849 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 23:50:22,849 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 23:50:22,849 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:50:22,849 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 23:50:22,850 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 23:50:22,850 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 23:50:22,850 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 23:50:22,850 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 23:50:22,850 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 23:50:22,850 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 23:50:22,850 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 23:50:22,851 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 23:50:22,851 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 23:50:22,851 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 23:50:23,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 23:50:23,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 23:50:23,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 23:50:23,101 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 23:50:23,102 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 23:50:23,103 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix042.opt.i [2024-06-27 23:50:24,160 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 23:50:24,358 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 23:50:24,358 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix042.opt.i [2024-06-27 23:50:24,378 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf96828b2/cbb6fb230d494a34ae43435960780111/FLAG40c33fc23 [2024-06-27 23:50:24,387 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf96828b2/cbb6fb230d494a34ae43435960780111 [2024-06-27 23:50:24,389 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 23:50:24,389 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 23:50:24,390 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix042.opt.yml/witness.yml [2024-06-27 23:50:24,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 23:50:24,459 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 23:50:24,459 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 23:50:24,460 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 23:50:24,463 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 23:50:24,464 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:50:24" (1/2) ... [2024-06-27 23:50:24,464 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57301ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:50:24, skipping insertion in model container [2024-06-27 23:50:24,465 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:50:24" (1/2) ... [2024-06-27 23:50:24,467 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4a95ac30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:50:24, skipping insertion in model container [2024-06-27 23:50:24,467 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:50:24" (2/2) ... [2024-06-27 23:50:24,468 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57301ad5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:50:24, skipping insertion in model container [2024-06-27 23:50:24,468 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:50:24" (2/2) ... [2024-06-27 23:50:24,468 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 23:50:24,488 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 23:50:24,489 INFO L97 edCorrectnessWitness]: Location invariant before [L828-L828] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-27 23:50:24,490 INFO L97 edCorrectnessWitness]: Location invariant before [L831-L831] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-27 23:50:24,490 INFO L97 edCorrectnessWitness]: Location invariant before [L830-L830] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-27 23:50:24,490 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 23:50:24,490 INFO L106 edCorrectnessWitness]: ghost_update [L826-L826] multithreaded = 1; [2024-06-27 23:50:24,519 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 23:50:24,727 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:50:24,740 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 23:50:24,875 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:50:24,911 INFO L206 MainTranslator]: Completed translation [2024-06-27 23:50:24,911 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:50:24 WrapperNode [2024-06-27 23:50:24,912 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 23:50:24,913 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 23:50:24,913 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 23:50:24,913 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 23:50:24,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:50:24" (1/1) ... [2024-06-27 23:50:24,946 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:50:24" (1/1) ... [2024-06-27 23:50:24,986 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 152 [2024-06-27 23:50:24,987 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 23:50:24,988 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 23:50:24,988 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 23:50:24,988 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 23:50:24,996 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:50:24" (1/1) ... [2024-06-27 23:50:24,997 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:50:24" (1/1) ... [2024-06-27 23:50:25,011 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:50:24" (1/1) ... [2024-06-27 23:50:25,029 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 23:50:25,033 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:50:24" (1/1) ... [2024-06-27 23:50:25,033 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:50:24" (1/1) ... [2024-06-27 23:50:25,044 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:50:24" (1/1) ... [2024-06-27 23:50:25,052 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:50:24" (1/1) ... [2024-06-27 23:50:25,053 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:50:24" (1/1) ... [2024-06-27 23:50:25,060 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:50:24" (1/1) ... [2024-06-27 23:50:25,063 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 23:50:25,067 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 23:50:25,067 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 23:50:25,067 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 23:50:25,068 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:50:24" (1/1) ... [2024-06-27 23:50:25,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:50:25,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 23:50:25,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 23:50:25,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 23:50:25,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 23:50:25,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 23:50:25,137 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 23:50:25,137 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 23:50:25,137 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 23:50:25,137 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 23:50:25,137 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 23:50:25,138 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 23:50:25,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 23:50:25,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 23:50:25,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 23:50:25,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 23:50:25,143 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 23:50:25,278 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 23:50:25,281 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 23:50:25,629 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 23:50:25,629 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 23:50:25,737 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 23:50:25,737 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 23:50:25,737 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:50:25 BoogieIcfgContainer [2024-06-27 23:50:25,738 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 23:50:25,740 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 23:50:25,740 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 23:50:25,742 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 23:50:25,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 11:50:24" (1/4) ... [2024-06-27 23:50:25,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22412a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:50:25, skipping insertion in model container [2024-06-27 23:50:25,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:50:24" (2/4) ... [2024-06-27 23:50:25,744 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22412a6d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:50:25, skipping insertion in model container [2024-06-27 23:50:25,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:50:24" (3/4) ... [2024-06-27 23:50:25,746 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22412a6d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:50:25, skipping insertion in model container [2024-06-27 23:50:25,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:50:25" (4/4) ... [2024-06-27 23:50:25,747 INFO L112 eAbstractionObserver]: Analyzing ICFG mix042.opt.i [2024-06-27 23:50:25,759 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 23:50:25,760 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 23:50:25,760 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 23:50:25,806 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 23:50:25,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 23:50:25,862 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 23:50:25,862 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:50:25,864 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 63 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. [2024-06-27 23:50:25,864 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 23:50:25,867 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 23:50:25,878 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 23:50:25,884 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;@7027617f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 23:50:25,884 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 23:50:25,886 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 23:50:25,887 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 23:50:25,887 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:50:25,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:25,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 23:50:25,887 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)] === [2024-06-27 23:50:25,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:25,891 INFO L85 PathProgramCache]: Analyzing trace with hash 371308986, now seen corresponding path program 1 times [2024-06-27 23:50:25,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:25,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337517608] [2024-06-27 23:50:25,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:25,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:26,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:26,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337517608] [2024-06-27 23:50:26,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337517608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:26,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:26,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 23:50:26,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742063215] [2024-06-27 23:50:26,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:27,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 23:50:27,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:27,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 23:50:27,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 23:50:27,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 23:50:27,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:27,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:27,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 23:50:27,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:27,367 INFO L124 PetriNetUnfolderBase]: 1059/1717 cut-off events. [2024-06-27 23:50:27,368 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-27 23:50:27,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3381 conditions, 1717 events. 1059/1717 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8755 event pairs, 698 based on Foata normal form. 1/1664 useless extension candidates. Maximal degree in co-relation 3369. Up to 1593 conditions per place. [2024-06-27 23:50:27,379 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 31 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-27 23:50:27,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 171 flow [2024-06-27 23:50:27,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 23:50:27,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 23:50:27,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-27 23:50:27,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 23:50:27,390 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 77 transitions. [2024-06-27 23:50:27,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 171 flow [2024-06-27 23:50:27,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:50:27,395 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 23:50:27,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-27 23:50:27,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 23:50:27,399 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 23:50:27,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:27,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:27,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:27,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 23:50:27,400 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:27,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:27,401 INFO L85 PathProgramCache]: Analyzing trace with hash 345675033, now seen corresponding path program 1 times [2024-06-27 23:50:27,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:27,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308040373] [2024-06-27 23:50:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:27,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:28,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:28,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308040373] [2024-06-27 23:50:28,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308040373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:28,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:28,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 23:50:28,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585533853] [2024-06-27 23:50:28,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:28,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 23:50:28,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:28,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 23:50:28,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 23:50:28,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:50:28,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:28,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:28,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:50:28,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:28,328 INFO L124 PetriNetUnfolderBase]: 1215/1894 cut-off events. [2024-06-27 23:50:28,328 INFO L125 PetriNetUnfolderBase]: For 378/378 co-relation queries the response was YES. [2024-06-27 23:50:28,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4305 conditions, 1894 events. 1215/1894 cut-off events. For 378/378 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9434 event pairs, 648 based on Foata normal form. 3/1872 useless extension candidates. Maximal degree in co-relation 4293. Up to 1803 conditions per place. [2024-06-27 23:50:28,337 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 39 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-27 23:50:28,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 240 flow [2024-06-27 23:50:28,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:50:28,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:50:28,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-27 23:50:28,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-27 23:50:28,341 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 97 transitions. [2024-06-27 23:50:28,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 240 flow [2024-06-27 23:50:28,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 23:50:28,344 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 23:50:28,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 23:50:28,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 23:50:28,345 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 23:50:28,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:28,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:28,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:28,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 23:50:28,348 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:28,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:28,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1325828590, now seen corresponding path program 1 times [2024-06-27 23:50:28,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:28,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329676958] [2024-06-27 23:50:28,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:28,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:29,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:29,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329676958] [2024-06-27 23:50:29,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329676958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:29,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:29,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:50:29,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285538309] [2024-06-27 23:50:29,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:29,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:50:29,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:29,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:50:29,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:50:29,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:50:29,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:29,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:29,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:50:29,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:29,556 INFO L124 PetriNetUnfolderBase]: 1545/2373 cut-off events. [2024-06-27 23:50:29,556 INFO L125 PetriNetUnfolderBase]: For 1251/1251 co-relation queries the response was YES. [2024-06-27 23:50:29,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5945 conditions, 2373 events. 1545/2373 cut-off events. For 1251/1251 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11561 event pairs, 575 based on Foata normal form. 6/2348 useless extension candidates. Maximal degree in co-relation 5931. Up to 2233 conditions per place. [2024-06-27 23:50:29,565 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 51 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2024-06-27 23:50:29,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 69 transitions, 352 flow [2024-06-27 23:50:29,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:50:29,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:50:29,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-27 23:50:29,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-27 23:50:29,567 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 132 transitions. [2024-06-27 23:50:29,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 69 transitions, 352 flow [2024-06-27 23:50:29,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 332 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 23:50:29,569 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-27 23:50:29,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 23:50:29,570 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-27 23:50:29,570 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-27 23:50:29,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:29,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:29,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:29,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 23:50:29,571 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)] === [2024-06-27 23:50:29,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:29,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1679440002, now seen corresponding path program 1 times [2024-06-27 23:50:29,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:29,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132180878] [2024-06-27 23:50:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:29,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:30,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:30,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132180878] [2024-06-27 23:50:30,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132180878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:30,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:30,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:50:30,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748810363] [2024-06-27 23:50:30,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:30,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:50:30,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:30,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:50:30,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:50:30,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:50:30,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:30,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:30,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:50:30,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:30,941 INFO L124 PetriNetUnfolderBase]: 1333/2129 cut-off events. [2024-06-27 23:50:30,941 INFO L125 PetriNetUnfolderBase]: For 2050/2050 co-relation queries the response was YES. [2024-06-27 23:50:30,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5783 conditions, 2129 events. 1333/2129 cut-off events. For 2050/2050 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10631 event pairs, 592 based on Foata normal form. 2/2100 useless extension candidates. Maximal degree in co-relation 5766. Up to 1980 conditions per place. [2024-06-27 23:50:30,952 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 42 selfloop transitions, 10 changer transitions 0/58 dead transitions. [2024-06-27 23:50:30,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 58 transitions, 336 flow [2024-06-27 23:50:30,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:50:30,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:50:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-27 23:50:30,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 23:50:30,955 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 96 transitions. [2024-06-27 23:50:30,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 58 transitions, 336 flow [2024-06-27 23:50:30,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 58 transitions, 307 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 23:50:30,961 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 218 flow [2024-06-27 23:50:30,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-06-27 23:50:30,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2024-06-27 23:50:30,962 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 218 flow [2024-06-27 23:50:30,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:30,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:30,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:30,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 23:50:30,963 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)] === [2024-06-27 23:50:30,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:30,963 INFO L85 PathProgramCache]: Analyzing trace with hash -523030790, now seen corresponding path program 1 times [2024-06-27 23:50:30,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:30,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103062591] [2024-06-27 23:50:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:30,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:32,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:32,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103062591] [2024-06-27 23:50:32,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103062591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:32,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:32,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:50:32,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880021606] [2024-06-27 23:50:32,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:32,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:50:32,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:32,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:50:32,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:50:32,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:50:32,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 218 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:32,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:32,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:50:32,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:32,599 INFO L124 PetriNetUnfolderBase]: 1323/2159 cut-off events. [2024-06-27 23:50:32,600 INFO L125 PetriNetUnfolderBase]: For 3044/3044 co-relation queries the response was YES. [2024-06-27 23:50:32,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6238 conditions, 2159 events. 1323/2159 cut-off events. For 3044/3044 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11068 event pairs, 556 based on Foata normal form. 4/2154 useless extension candidates. Maximal degree in co-relation 6217. Up to 1948 conditions per place. [2024-06-27 23:50:32,609 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 47 selfloop transitions, 13 changer transitions 0/66 dead transitions. [2024-06-27 23:50:32,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 394 flow [2024-06-27 23:50:32,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:50:32,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:50:32,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-27 23:50:32,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 23:50:32,611 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 218 flow. Second operand 6 states and 114 transitions. [2024-06-27 23:50:32,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 394 flow [2024-06-27 23:50:32,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 378 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 23:50:32,614 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 262 flow [2024-06-27 23:50:32,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2024-06-27 23:50:32,614 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-27 23:50:32,614 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 262 flow [2024-06-27 23:50:32,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:32,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:32,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:32,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 23:50:32,615 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)] === [2024-06-27 23:50:32,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:32,616 INFO L85 PathProgramCache]: Analyzing trace with hash 239848209, now seen corresponding path program 1 times [2024-06-27 23:50:32,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:32,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232600800] [2024-06-27 23:50:32,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:32,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:33,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:33,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232600800] [2024-06-27 23:50:33,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232600800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:33,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:33,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:50:33,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763258416] [2024-06-27 23:50:33,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:33,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:50:33,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:33,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:50:33,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:50:33,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:50:33,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:33,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:33,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:50:33,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:34,319 INFO L124 PetriNetUnfolderBase]: 1569/2434 cut-off events. [2024-06-27 23:50:34,319 INFO L125 PetriNetUnfolderBase]: For 5125/5129 co-relation queries the response was YES. [2024-06-27 23:50:34,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7785 conditions, 2434 events. 1569/2434 cut-off events. For 5125/5129 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11921 event pairs, 661 based on Foata normal form. 6/2430 useless extension candidates. Maximal degree in co-relation 7761. Up to 2269 conditions per place. [2024-06-27 23:50:34,332 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 24 changer transitions 0/84 dead transitions. [2024-06-27 23:50:34,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 84 transitions, 592 flow [2024-06-27 23:50:34,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:50:34,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:50:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-27 23:50:34,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 23:50:34,334 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 262 flow. Second operand 6 states and 117 transitions. [2024-06-27 23:50:34,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 84 transitions, 592 flow [2024-06-27 23:50:34,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 84 transitions, 562 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 23:50:34,339 INFO L231 Difference]: Finished difference. Result has 61 places, 65 transitions, 396 flow [2024-06-27 23:50:34,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=396, PETRI_PLACES=61, PETRI_TRANSITIONS=65} [2024-06-27 23:50:34,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-27 23:50:34,341 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 65 transitions, 396 flow [2024-06-27 23:50:34,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:34,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:34,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:34,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 23:50:34,341 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)] === [2024-06-27 23:50:34,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:34,342 INFO L85 PathProgramCache]: Analyzing trace with hash 990039219, now seen corresponding path program 2 times [2024-06-27 23:50:34,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:34,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534087477] [2024-06-27 23:50:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:34,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:35,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:35,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534087477] [2024-06-27 23:50:35,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534087477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:35,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:35,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:50:35,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133898150] [2024-06-27 23:50:35,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:35,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:50:35,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:35,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:50:35,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:50:35,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:50:35,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 396 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:35,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:35,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:50:35,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:36,007 INFO L124 PetriNetUnfolderBase]: 1564/2427 cut-off events. [2024-06-27 23:50:36,007 INFO L125 PetriNetUnfolderBase]: For 6943/6945 co-relation queries the response was YES. [2024-06-27 23:50:36,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8368 conditions, 2427 events. 1564/2427 cut-off events. For 6943/6945 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11837 event pairs, 658 based on Foata normal form. 4/2421 useless extension candidates. Maximal degree in co-relation 8340. Up to 2264 conditions per place. [2024-06-27 23:50:36,022 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 51 selfloop transitions, 25 changer transitions 0/81 dead transitions. [2024-06-27 23:50:36,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 81 transitions, 612 flow [2024-06-27 23:50:36,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:50:36,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:50:36,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 23:50:36,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-27 23:50:36,024 INFO L175 Difference]: Start difference. First operand has 61 places, 65 transitions, 396 flow. Second operand 6 states and 113 transitions. [2024-06-27 23:50:36,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 81 transitions, 612 flow [2024-06-27 23:50:36,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 592 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-27 23:50:36,030 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 436 flow [2024-06-27 23:50:36,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=436, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-27 23:50:36,030 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-27 23:50:36,031 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 436 flow [2024-06-27 23:50:36,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:36,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:36,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:36,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 23:50:36,031 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)] === [2024-06-27 23:50:36,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:36,032 INFO L85 PathProgramCache]: Analyzing trace with hash 746043025, now seen corresponding path program 3 times [2024-06-27 23:50:36,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:36,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447608701] [2024-06-27 23:50:36,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:36,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:36,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:36,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447608701] [2024-06-27 23:50:36,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447608701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:36,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:36,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:50:36,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804583292] [2024-06-27 23:50:36,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:36,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:50:36,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:36,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:50:36,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:50:37,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:50:37,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 436 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:37,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:37,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:50:37,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:37,510 INFO L124 PetriNetUnfolderBase]: 1587/2462 cut-off events. [2024-06-27 23:50:37,510 INFO L125 PetriNetUnfolderBase]: For 8369/8375 co-relation queries the response was YES. [2024-06-27 23:50:37,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8724 conditions, 2462 events. 1587/2462 cut-off events. For 8369/8375 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12003 event pairs, 656 based on Foata normal form. 8/2460 useless extension candidates. Maximal degree in co-relation 8691. Up to 2288 conditions per place. [2024-06-27 23:50:37,526 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 56 selfloop transitions, 37 changer transitions 0/98 dead transitions. [2024-06-27 23:50:37,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 98 transitions, 795 flow [2024-06-27 23:50:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:50:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:50:37,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 23:50:37,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 23:50:37,528 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 436 flow. Second operand 7 states and 130 transitions. [2024-06-27 23:50:37,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 98 transitions, 795 flow [2024-06-27 23:50:37,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 720 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 23:50:37,534 INFO L231 Difference]: Finished difference. Result has 73 places, 78 transitions, 598 flow [2024-06-27 23:50:37,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=598, PETRI_PLACES=73, PETRI_TRANSITIONS=78} [2024-06-27 23:50:37,536 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-27 23:50:37,537 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 78 transitions, 598 flow [2024-06-27 23:50:37,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:37,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:37,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:37,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 23:50:37,537 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:37,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:37,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1917854085, now seen corresponding path program 1 times [2024-06-27 23:50:37,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:37,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026884416] [2024-06-27 23:50:37,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:37,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:38,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:38,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026884416] [2024-06-27 23:50:38,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026884416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:38,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:38,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:50:38,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457761377] [2024-06-27 23:50:38,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:38,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:50:38,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:38,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:50:38,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:50:38,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:50:38,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 78 transitions, 598 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:38,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:38,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:50:38,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:39,661 INFO L124 PetriNetUnfolderBase]: 1610/2501 cut-off events. [2024-06-27 23:50:39,661 INFO L125 PetriNetUnfolderBase]: For 10259/10259 co-relation queries the response was YES. [2024-06-27 23:50:39,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9158 conditions, 2501 events. 1610/2501 cut-off events. For 10259/10259 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12206 event pairs, 628 based on Foata normal form. 2/2492 useless extension candidates. Maximal degree in co-relation 9122. Up to 2329 conditions per place. [2024-06-27 23:50:39,673 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 75 selfloop transitions, 26 changer transitions 0/106 dead transitions. [2024-06-27 23:50:39,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 106 transitions, 912 flow [2024-06-27 23:50:39,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:50:39,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:50:39,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 23:50:39,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 23:50:39,674 INFO L175 Difference]: Start difference. First operand has 73 places, 78 transitions, 598 flow. Second operand 8 states and 139 transitions. [2024-06-27 23:50:39,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 106 transitions, 912 flow [2024-06-27 23:50:39,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 106 transitions, 853 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 23:50:39,683 INFO L231 Difference]: Finished difference. Result has 78 places, 86 transitions, 660 flow [2024-06-27 23:50:39,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=539, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=660, PETRI_PLACES=78, PETRI_TRANSITIONS=86} [2024-06-27 23:50:39,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-27 23:50:39,684 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 86 transitions, 660 flow [2024-06-27 23:50:39,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:39,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:39,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:39,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 23:50:39,685 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:39,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:39,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1154638393, now seen corresponding path program 1 times [2024-06-27 23:50:39,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:39,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171098437] [2024-06-27 23:50:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:39,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:40,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:40,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171098437] [2024-06-27 23:50:40,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171098437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:40,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:40,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:50:40,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213049069] [2024-06-27 23:50:40,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:40,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:50:40,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:40,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:50:40,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:50:40,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:50:40,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 86 transitions, 660 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:40,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:40,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:50:40,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:41,625 INFO L124 PetriNetUnfolderBase]: 1664/2583 cut-off events. [2024-06-27 23:50:41,625 INFO L125 PetriNetUnfolderBase]: For 13538/13540 co-relation queries the response was YES. [2024-06-27 23:50:41,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9995 conditions, 2583 events. 1664/2583 cut-off events. For 13538/13540 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12615 event pairs, 595 based on Foata normal form. 6/2575 useless extension candidates. Maximal degree in co-relation 9958. Up to 2297 conditions per place. [2024-06-27 23:50:41,636 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 72 selfloop transitions, 44 changer transitions 0/121 dead transitions. [2024-06-27 23:50:41,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 121 transitions, 1110 flow [2024-06-27 23:50:41,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:50:41,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:50:41,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 23:50:41,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-27 23:50:41,637 INFO L175 Difference]: Start difference. First operand has 78 places, 86 transitions, 660 flow. Second operand 7 states and 138 transitions. [2024-06-27 23:50:41,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 121 transitions, 1110 flow [2024-06-27 23:50:41,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 121 transitions, 1054 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 23:50:41,647 INFO L231 Difference]: Finished difference. Result has 82 places, 95 transitions, 782 flow [2024-06-27 23:50:41,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=782, PETRI_PLACES=82, PETRI_TRANSITIONS=95} [2024-06-27 23:50:41,648 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-27 23:50:41,648 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 95 transitions, 782 flow [2024-06-27 23:50:41,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:41,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:41,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:41,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 23:50:41,648 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:41,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:41,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1154638579, now seen corresponding path program 2 times [2024-06-27 23:50:41,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:41,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490829406] [2024-06-27 23:50:41,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:41,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:42,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:42,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490829406] [2024-06-27 23:50:42,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490829406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:42,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:42,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:50:42,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214459953] [2024-06-27 23:50:42,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:42,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:50:42,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:42,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:50:42,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:50:42,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:50:42,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 95 transitions, 782 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:42,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:42,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:50:42,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:43,602 INFO L124 PetriNetUnfolderBase]: 1691/2624 cut-off events. [2024-06-27 23:50:43,602 INFO L125 PetriNetUnfolderBase]: For 16988/16992 co-relation queries the response was YES. [2024-06-27 23:50:43,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10789 conditions, 2624 events. 1691/2624 cut-off events. For 16988/16992 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12855 event pairs, 620 based on Foata normal form. 6/2617 useless extension candidates. Maximal degree in co-relation 10750. Up to 2356 conditions per place. [2024-06-27 23:50:43,613 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 75 selfloop transitions, 48 changer transitions 0/128 dead transitions. [2024-06-27 23:50:43,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 1276 flow [2024-06-27 23:50:43,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:50:43,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:50:43,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 23:50:43,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 23:50:43,614 INFO L175 Difference]: Start difference. First operand has 82 places, 95 transitions, 782 flow. Second operand 7 states and 137 transitions. [2024-06-27 23:50:43,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 1276 flow [2024-06-27 23:50:43,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 128 transitions, 1234 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 23:50:43,627 INFO L231 Difference]: Finished difference. Result has 86 places, 104 transitions, 950 flow [2024-06-27 23:50:43,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=950, PETRI_PLACES=86, PETRI_TRANSITIONS=104} [2024-06-27 23:50:43,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-27 23:50:43,628 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 104 transitions, 950 flow [2024-06-27 23:50:43,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:43,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:43,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:43,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 23:50:43,629 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:43,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:43,629 INFO L85 PathProgramCache]: Analyzing trace with hash 626446437, now seen corresponding path program 2 times [2024-06-27 23:50:43,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:43,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855233155] [2024-06-27 23:50:43,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:43,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:44,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:44,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855233155] [2024-06-27 23:50:44,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855233155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:44,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:44,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:50:44,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917096292] [2024-06-27 23:50:44,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:44,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:50:44,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:44,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:50:44,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:50:44,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:50:44,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 104 transitions, 950 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:44,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:44,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:50:44,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:45,604 INFO L124 PetriNetUnfolderBase]: 1713/2657 cut-off events. [2024-06-27 23:50:45,604 INFO L125 PetriNetUnfolderBase]: For 20712/20716 co-relation queries the response was YES. [2024-06-27 23:50:45,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11586 conditions, 2657 events. 1713/2657 cut-off events. For 20712/20716 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12930 event pairs, 623 based on Foata normal form. 8/2652 useless extension candidates. Maximal degree in co-relation 11544. Up to 2355 conditions per place. [2024-06-27 23:50:45,618 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 82 selfloop transitions, 47 changer transitions 0/134 dead transitions. [2024-06-27 23:50:45,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 134 transitions, 1406 flow [2024-06-27 23:50:45,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:50:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:50:45,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 23:50:45,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-27 23:50:45,633 INFO L175 Difference]: Start difference. First operand has 86 places, 104 transitions, 950 flow. Second operand 7 states and 136 transitions. [2024-06-27 23:50:45,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 134 transitions, 1406 flow [2024-06-27 23:50:45,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 134 transitions, 1374 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 23:50:45,649 INFO L231 Difference]: Finished difference. Result has 91 places, 107 transitions, 1053 flow [2024-06-27 23:50:45,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1053, PETRI_PLACES=91, PETRI_TRANSITIONS=107} [2024-06-27 23:50:45,650 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-27 23:50:45,650 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 107 transitions, 1053 flow [2024-06-27 23:50:45,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:45,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:45,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:45,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 23:50:45,651 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:45,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:45,651 INFO L85 PathProgramCache]: Analyzing trace with hash -977507059, now seen corresponding path program 3 times [2024-06-27 23:50:45,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:45,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974219300] [2024-06-27 23:50:45,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:45,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:46,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:46,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974219300] [2024-06-27 23:50:46,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974219300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:46,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:46,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:50:46,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050439179] [2024-06-27 23:50:46,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:46,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:50:46,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:46,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:50:46,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:50:46,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:50:46,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 107 transitions, 1053 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:46,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:46,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:50:46,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:47,574 INFO L124 PetriNetUnfolderBase]: 1708/2645 cut-off events. [2024-06-27 23:50:47,575 INFO L125 PetriNetUnfolderBase]: For 23729/23729 co-relation queries the response was YES. [2024-06-27 23:50:47,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11944 conditions, 2645 events. 1708/2645 cut-off events. For 23729/23729 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12908 event pairs, 622 based on Foata normal form. 2/2634 useless extension candidates. Maximal degree in co-relation 11898. Up to 2383 conditions per place. [2024-06-27 23:50:47,587 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 74 selfloop transitions, 49 changer transitions 0/128 dead transitions. [2024-06-27 23:50:47,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 128 transitions, 1413 flow [2024-06-27 23:50:47,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:50:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:50:47,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 23:50:47,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-27 23:50:47,589 INFO L175 Difference]: Start difference. First operand has 91 places, 107 transitions, 1053 flow. Second operand 7 states and 132 transitions. [2024-06-27 23:50:47,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 128 transitions, 1413 flow [2024-06-27 23:50:47,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 128 transitions, 1338 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 23:50:47,612 INFO L231 Difference]: Finished difference. Result has 95 places, 107 transitions, 1087 flow [2024-06-27 23:50:47,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1087, PETRI_PLACES=95, PETRI_TRANSITIONS=107} [2024-06-27 23:50:47,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-27 23:50:47,613 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 107 transitions, 1087 flow [2024-06-27 23:50:47,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:47,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:47,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:47,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 23:50:47,613 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:47,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:47,614 INFO L85 PathProgramCache]: Analyzing trace with hash -121368423, now seen corresponding path program 3 times [2024-06-27 23:50:47,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:47,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460611664] [2024-06-27 23:50:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:47,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:48,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:48,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460611664] [2024-06-27 23:50:48,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460611664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:48,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:48,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:50:48,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894931069] [2024-06-27 23:50:48,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:48,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:50:48,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:48,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:50:48,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:50:48,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:50:48,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 107 transitions, 1087 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:48,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:48,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:50:48,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:49,466 INFO L124 PetriNetUnfolderBase]: 1698/2636 cut-off events. [2024-06-27 23:50:49,467 INFO L125 PetriNetUnfolderBase]: For 26101/26105 co-relation queries the response was YES. [2024-06-27 23:50:49,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12045 conditions, 2636 events. 1698/2636 cut-off events. For 26101/26105 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12882 event pairs, 573 based on Foata normal form. 8/2631 useless extension candidates. Maximal degree in co-relation 11996. Up to 2340 conditions per place. [2024-06-27 23:50:49,509 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 74 selfloop transitions, 51 changer transitions 0/130 dead transitions. [2024-06-27 23:50:49,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 130 transitions, 1457 flow [2024-06-27 23:50:49,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:50:49,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:50:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 23:50:49,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-27 23:50:49,510 INFO L175 Difference]: Start difference. First operand has 95 places, 107 transitions, 1087 flow. Second operand 7 states and 132 transitions. [2024-06-27 23:50:49,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 130 transitions, 1457 flow [2024-06-27 23:50:49,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 130 transitions, 1350 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 23:50:49,538 INFO L231 Difference]: Finished difference. Result has 97 places, 107 transitions, 1092 flow [2024-06-27 23:50:49,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1092, PETRI_PLACES=97, PETRI_TRANSITIONS=107} [2024-06-27 23:50:49,539 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-27 23:50:49,539 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 107 transitions, 1092 flow [2024-06-27 23:50:49,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:49,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:49,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:49,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 23:50:49,539 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:49,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:49,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1652378859, now seen corresponding path program 4 times [2024-06-27 23:50:49,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:49,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928291440] [2024-06-27 23:50:49,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:49,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:50,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:50,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928291440] [2024-06-27 23:50:50,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928291440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:50,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:50,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:50:50,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325426264] [2024-06-27 23:50:50,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:50,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:50:50,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:50,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:50:50,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:50:50,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:50:50,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 107 transitions, 1092 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:50,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:50,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:50:50,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:51,254 INFO L124 PetriNetUnfolderBase]: 1742/2706 cut-off events. [2024-06-27 23:50:51,254 INFO L125 PetriNetUnfolderBase]: For 29231/29233 co-relation queries the response was YES. [2024-06-27 23:50:51,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12602 conditions, 2706 events. 1742/2706 cut-off events. For 29231/29233 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 13286 event pairs, 609 based on Foata normal form. 4/2697 useless extension candidates. Maximal degree in co-relation 12551. Up to 2507 conditions per place. [2024-06-27 23:50:51,272 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 104 selfloop transitions, 40 changer transitions 0/149 dead transitions. [2024-06-27 23:50:51,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 149 transitions, 1597 flow [2024-06-27 23:50:51,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:50:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:50:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 23:50:51,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 23:50:51,273 INFO L175 Difference]: Start difference. First operand has 97 places, 107 transitions, 1092 flow. Second operand 8 states and 146 transitions. [2024-06-27 23:50:51,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 149 transitions, 1597 flow [2024-06-27 23:50:51,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 149 transitions, 1508 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 23:50:51,314 INFO L231 Difference]: Finished difference. Result has 102 places, 124 transitions, 1264 flow [2024-06-27 23:50:51,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1264, PETRI_PLACES=102, PETRI_TRANSITIONS=124} [2024-06-27 23:50:51,316 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-27 23:50:51,316 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 124 transitions, 1264 flow [2024-06-27 23:50:51,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:51,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:51,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:51,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 23:50:51,316 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:51,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:51,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1682450567, now seen corresponding path program 5 times [2024-06-27 23:50:51,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:51,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505529063] [2024-06-27 23:50:51,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:51,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:52,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:52,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505529063] [2024-06-27 23:50:52,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505529063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:52,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:52,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:50:52,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44439921] [2024-06-27 23:50:52,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:52,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:50:52,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:52,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:50:52,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:50:52,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:50:52,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 124 transitions, 1264 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:52,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:52,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:50:52,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:52,895 INFO L124 PetriNetUnfolderBase]: 1788/2780 cut-off events. [2024-06-27 23:50:52,896 INFO L125 PetriNetUnfolderBase]: For 33254/33258 co-relation queries the response was YES. [2024-06-27 23:50:52,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13249 conditions, 2780 events. 1788/2780 cut-off events. For 33254/33258 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 13724 event pairs, 609 based on Foata normal form. 6/2773 useless extension candidates. Maximal degree in co-relation 13195. Up to 2539 conditions per place. [2024-06-27 23:50:52,912 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 107 selfloop transitions, 63 changer transitions 0/175 dead transitions. [2024-06-27 23:50:52,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 175 transitions, 1940 flow [2024-06-27 23:50:52,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:50:52,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:50:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 23:50:52,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-27 23:50:52,914 INFO L175 Difference]: Start difference. First operand has 102 places, 124 transitions, 1264 flow. Second operand 10 states and 176 transitions. [2024-06-27 23:50:52,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 175 transitions, 1940 flow [2024-06-27 23:50:52,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 175 transitions, 1834 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 23:50:52,954 INFO L231 Difference]: Finished difference. Result has 111 places, 144 transitions, 1576 flow [2024-06-27 23:50:52,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1576, PETRI_PLACES=111, PETRI_TRANSITIONS=144} [2024-06-27 23:50:52,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-27 23:50:52,954 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 144 transitions, 1576 flow [2024-06-27 23:50:52,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:52,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:52,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:52,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 23:50:52,955 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:52,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:52,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1150564583, now seen corresponding path program 4 times [2024-06-27 23:50:52,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:52,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177959851] [2024-06-27 23:50:52,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:52,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:53,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:53,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177959851] [2024-06-27 23:50:53,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177959851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:53,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:53,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:50:53,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302588685] [2024-06-27 23:50:53,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:53,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:50:53,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:53,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:50:53,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:50:54,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:50:54,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 144 transitions, 1576 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:54,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:54,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:50:54,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:54,849 INFO L124 PetriNetUnfolderBase]: 1834/2855 cut-off events. [2024-06-27 23:50:54,850 INFO L125 PetriNetUnfolderBase]: For 37858/37860 co-relation queries the response was YES. [2024-06-27 23:50:54,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13886 conditions, 2855 events. 1834/2855 cut-off events. For 37858/37860 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 14162 event pairs, 636 based on Foata normal form. 6/2847 useless extension candidates. Maximal degree in co-relation 13829. Up to 2514 conditions per place. [2024-06-27 23:50:54,866 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 119 selfloop transitions, 61 changer transitions 0/185 dead transitions. [2024-06-27 23:50:54,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 185 transitions, 2154 flow [2024-06-27 23:50:54,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:50:54,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:50:54,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 23:50:54,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 23:50:54,870 INFO L175 Difference]: Start difference. First operand has 111 places, 144 transitions, 1576 flow. Second operand 8 states and 153 transitions. [2024-06-27 23:50:54,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 185 transitions, 2154 flow [2024-06-27 23:50:54,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 185 transitions, 1987 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 23:50:54,916 INFO L231 Difference]: Finished difference. Result has 113 places, 157 transitions, 1683 flow [2024-06-27 23:50:54,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1683, PETRI_PLACES=113, PETRI_TRANSITIONS=157} [2024-06-27 23:50:54,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-27 23:50:54,917 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 157 transitions, 1683 flow [2024-06-27 23:50:54,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:54,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:54,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:54,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 23:50:54,917 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:54,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:54,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1173801749, now seen corresponding path program 6 times [2024-06-27 23:50:54,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:54,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275658666] [2024-06-27 23:50:54,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:54,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:55,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:55,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275658666] [2024-06-27 23:50:55,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275658666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:55,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:55,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:50:55,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341661953] [2024-06-27 23:50:55,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:55,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:50:55,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:55,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:50:55,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:50:55,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:50:55,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 157 transitions, 1683 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:55,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:55,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:50:55,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:56,518 INFO L124 PetriNetUnfolderBase]: 1850/2876 cut-off events. [2024-06-27 23:50:56,518 INFO L125 PetriNetUnfolderBase]: For 41039/41041 co-relation queries the response was YES. [2024-06-27 23:50:56,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14262 conditions, 2876 events. 1850/2876 cut-off events. For 41039/41041 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 14240 event pairs, 674 based on Foata normal form. 4/2867 useless extension candidates. Maximal degree in co-relation 14205. Up to 2541 conditions per place. [2024-06-27 23:50:56,539 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 93 selfloop transitions, 94 changer transitions 0/192 dead transitions. [2024-06-27 23:50:56,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 192 transitions, 2266 flow [2024-06-27 23:50:56,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:50:56,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:50:56,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 23:50:56,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 23:50:56,541 INFO L175 Difference]: Start difference. First operand has 113 places, 157 transitions, 1683 flow. Second operand 8 states and 149 transitions. [2024-06-27 23:50:56,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 192 transitions, 2266 flow [2024-06-27 23:50:56,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 192 transitions, 2124 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-27 23:50:56,604 INFO L231 Difference]: Finished difference. Result has 119 places, 168 transitions, 1885 flow [2024-06-27 23:50:56,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1885, PETRI_PLACES=119, PETRI_TRANSITIONS=168} [2024-06-27 23:50:56,605 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-27 23:50:56,605 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 168 transitions, 1885 flow [2024-06-27 23:50:56,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:56,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:56,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:56,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 23:50:56,606 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:56,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:56,606 INFO L85 PathProgramCache]: Analyzing trace with hash 626692515, now seen corresponding path program 1 times [2024-06-27 23:50:56,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:56,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159429756] [2024-06-27 23:50:56,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:56,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:58,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:58,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159429756] [2024-06-27 23:50:58,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159429756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:58,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:58,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:50:58,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780997991] [2024-06-27 23:50:58,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:58,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:50:58,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:58,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:50:58,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:50:58,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:50:58,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 168 transitions, 1885 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:50:58,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:58,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:50:58,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:59,068 INFO L124 PetriNetUnfolderBase]: 1842/2865 cut-off events. [2024-06-27 23:50:59,068 INFO L125 PetriNetUnfolderBase]: For 45336/45336 co-relation queries the response was YES. [2024-06-27 23:50:59,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14402 conditions, 2865 events. 1842/2865 cut-off events. For 45336/45336 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 14204 event pairs, 661 based on Foata normal form. 4/2854 useless extension candidates. Maximal degree in co-relation 14342. Up to 2679 conditions per place. [2024-06-27 23:50:59,084 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 170 selfloop transitions, 15 changer transitions 0/190 dead transitions. [2024-06-27 23:50:59,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 190 transitions, 2373 flow [2024-06-27 23:50:59,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:50:59,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:50:59,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 23:50:59,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 23:50:59,085 INFO L175 Difference]: Start difference. First operand has 119 places, 168 transitions, 1885 flow. Second operand 8 states and 134 transitions. [2024-06-27 23:50:59,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 190 transitions, 2373 flow [2024-06-27 23:50:59,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 190 transitions, 2207 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 23:50:59,125 INFO L231 Difference]: Finished difference. Result has 123 places, 170 transitions, 1788 flow [2024-06-27 23:50:59,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1788, PETRI_PLACES=123, PETRI_TRANSITIONS=170} [2024-06-27 23:50:59,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-27 23:50:59,126 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 170 transitions, 1788 flow [2024-06-27 23:50:59,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:50:59,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:59,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:59,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 23:50:59,126 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)] === [2024-06-27 23:50:59,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:59,127 INFO L85 PathProgramCache]: Analyzing trace with hash 2131044602, now seen corresponding path program 1 times [2024-06-27 23:50:59,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:59,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541641709] [2024-06-27 23:50:59,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:59,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:59,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:59,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541641709] [2024-06-27 23:50:59,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541641709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:59,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:59,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:50:59,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382145086] [2024-06-27 23:50:59,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:59,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:50:59,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:59,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:50:59,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:50:59,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 23:50:59,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 170 transitions, 1788 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:59,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:59,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 23:50:59,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:00,317 INFO L124 PetriNetUnfolderBase]: 1484/2475 cut-off events. [2024-06-27 23:51:00,317 INFO L125 PetriNetUnfolderBase]: For 41571/41572 co-relation queries the response was YES. [2024-06-27 23:51:00,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12335 conditions, 2475 events. 1484/2475 cut-off events. For 41571/41572 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 13282 event pairs, 593 based on Foata normal form. 2/2453 useless extension candidates. Maximal degree in co-relation 12274. Up to 2188 conditions per place. [2024-06-27 23:51:00,332 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 145 selfloop transitions, 10 changer transitions 0/180 dead transitions. [2024-06-27 23:51:00,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 180 transitions, 2146 flow [2024-06-27 23:51:00,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:51:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:51:00,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-27 23:51:00,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 23:51:00,334 INFO L175 Difference]: Start difference. First operand has 123 places, 170 transitions, 1788 flow. Second operand 5 states and 96 transitions. [2024-06-27 23:51:00,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 180 transitions, 2146 flow [2024-06-27 23:51:00,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 180 transitions, 2088 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 23:51:00,377 INFO L231 Difference]: Finished difference. Result has 122 places, 173 transitions, 1782 flow [2024-06-27 23:51:00,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1782, PETRI_PLACES=122, PETRI_TRANSITIONS=173} [2024-06-27 23:51:00,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-27 23:51:00,378 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 173 transitions, 1782 flow [2024-06-27 23:51:00,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:00,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:00,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:00,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 23:51:00,379 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:00,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:00,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1437774931, now seen corresponding path program 1 times [2024-06-27 23:51:00,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:00,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912805331] [2024-06-27 23:51:00,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:00,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:01,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:01,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912805331] [2024-06-27 23:51:01,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912805331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:01,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:01,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:01,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998064924] [2024-06-27 23:51:01,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:01,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:01,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:01,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:01,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:02,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:02,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 173 transitions, 1782 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:02,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:02,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:02,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:02,856 INFO L124 PetriNetUnfolderBase]: 1861/2889 cut-off events. [2024-06-27 23:51:02,856 INFO L125 PetriNetUnfolderBase]: For 52970/52970 co-relation queries the response was YES. [2024-06-27 23:51:02,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15011 conditions, 2889 events. 1861/2889 cut-off events. For 52970/52970 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 14258 event pairs, 560 based on Foata normal form. 4/2892 useless extension candidates. Maximal degree in co-relation 14951. Up to 2642 conditions per place. [2024-06-27 23:51:02,873 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 143 selfloop transitions, 50 changer transitions 0/198 dead transitions. [2024-06-27 23:51:02,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 198 transitions, 2284 flow [2024-06-27 23:51:02,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:51:02,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:51:02,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 23:51:02,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 23:51:02,874 INFO L175 Difference]: Start difference. First operand has 122 places, 173 transitions, 1782 flow. Second operand 9 states and 156 transitions. [2024-06-27 23:51:02,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 198 transitions, 2284 flow [2024-06-27 23:51:02,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 198 transitions, 2254 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 23:51:02,914 INFO L231 Difference]: Finished difference. Result has 128 places, 176 transitions, 1905 flow [2024-06-27 23:51:02,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1752, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1905, PETRI_PLACES=128, PETRI_TRANSITIONS=176} [2024-06-27 23:51:02,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-27 23:51:02,915 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 176 transitions, 1905 flow [2024-06-27 23:51:02,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:02,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:02,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:02,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 23:51:02,915 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:02,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:02,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1434055861, now seen corresponding path program 2 times [2024-06-27 23:51:02,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:02,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849650090] [2024-06-27 23:51:02,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:02,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:04,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:04,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849650090] [2024-06-27 23:51:04,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849650090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:04,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:04,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:04,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93871182] [2024-06-27 23:51:04,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:04,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:04,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:04,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:04,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:04,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:04,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 176 transitions, 1905 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:04,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:04,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:04,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:04,876 INFO L124 PetriNetUnfolderBase]: 1947/3038 cut-off events. [2024-06-27 23:51:04,876 INFO L125 PetriNetUnfolderBase]: For 61053/61053 co-relation queries the response was YES. [2024-06-27 23:51:04,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16531 conditions, 3038 events. 1947/3038 cut-off events. For 61053/61053 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 15292 event pairs, 490 based on Foata normal form. 4/3040 useless extension candidates. Maximal degree in co-relation 16470. Up to 2348 conditions per place. [2024-06-27 23:51:04,892 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 113 selfloop transitions, 107 changer transitions 0/225 dead transitions. [2024-06-27 23:51:04,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 225 transitions, 2926 flow [2024-06-27 23:51:04,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:51:04,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:51:04,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 23:51:04,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-27 23:51:04,893 INFO L175 Difference]: Start difference. First operand has 128 places, 176 transitions, 1905 flow. Second operand 8 states and 164 transitions. [2024-06-27 23:51:04,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 225 transitions, 2926 flow [2024-06-27 23:51:04,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 225 transitions, 2803 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 23:51:04,945 INFO L231 Difference]: Finished difference. Result has 129 places, 188 transitions, 2182 flow [2024-06-27 23:51:04,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2182, PETRI_PLACES=129, PETRI_TRANSITIONS=188} [2024-06-27 23:51:04,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-27 23:51:04,946 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 188 transitions, 2182 flow [2024-06-27 23:51:04,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:04,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:04,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:04,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 23:51:04,947 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:04,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:04,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1434050281, now seen corresponding path program 3 times [2024-06-27 23:51:04,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:04,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682407617] [2024-06-27 23:51:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:04,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:06,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:06,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682407617] [2024-06-27 23:51:06,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682407617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:06,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:06,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:06,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669234936] [2024-06-27 23:51:06,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:06,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:06,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:06,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:06,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:06,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:06,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 188 transitions, 2182 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:06,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:06,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:06,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:07,369 INFO L124 PetriNetUnfolderBase]: 1937/3024 cut-off events. [2024-06-27 23:51:07,370 INFO L125 PetriNetUnfolderBase]: For 67252/67252 co-relation queries the response was YES. [2024-06-27 23:51:07,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17067 conditions, 3024 events. 1937/3024 cut-off events. For 67252/67252 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 15153 event pairs, 490 based on Foata normal form. 4/3026 useless extension candidates. Maximal degree in co-relation 17004. Up to 2340 conditions per place. [2024-06-27 23:51:07,389 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 105 selfloop transitions, 111 changer transitions 0/221 dead transitions. [2024-06-27 23:51:07,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 221 transitions, 2935 flow [2024-06-27 23:51:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:51:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:51:07,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 23:51:07,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 23:51:07,391 INFO L175 Difference]: Start difference. First operand has 129 places, 188 transitions, 2182 flow. Second operand 8 states and 160 transitions. [2024-06-27 23:51:07,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 221 transitions, 2935 flow [2024-06-27 23:51:07,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 221 transitions, 2868 flow, removed 31 selfloop flow, removed 1 redundant places. [2024-06-27 23:51:07,453 INFO L231 Difference]: Finished difference. Result has 136 places, 188 transitions, 2349 flow [2024-06-27 23:51:07,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2115, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2349, PETRI_PLACES=136, PETRI_TRANSITIONS=188} [2024-06-27 23:51:07,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-27 23:51:07,454 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 188 transitions, 2349 flow [2024-06-27 23:51:07,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:07,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:07,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:07,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 23:51:07,454 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:07,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:07,455 INFO L85 PathProgramCache]: Analyzing trace with hash -2047643749, now seen corresponding path program 4 times [2024-06-27 23:51:07,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:07,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48816351] [2024-06-27 23:51:07,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:07,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:08,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:08,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48816351] [2024-06-27 23:51:08,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48816351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:08,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:08,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:08,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499802419] [2024-06-27 23:51:08,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:08,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:08,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:08,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:08,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:08,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:08,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 188 transitions, 2349 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:08,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:08,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:08,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:09,693 INFO L124 PetriNetUnfolderBase]: 1959/3064 cut-off events. [2024-06-27 23:51:09,694 INFO L125 PetriNetUnfolderBase]: For 73642/73642 co-relation queries the response was YES. [2024-06-27 23:51:09,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17802 conditions, 3064 events. 1959/3064 cut-off events. For 73642/73642 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 15417 event pairs, 510 based on Foata normal form. 4/3067 useless extension candidates. Maximal degree in co-relation 17735. Up to 2359 conditions per place. [2024-06-27 23:51:09,713 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 86 selfloop transitions, 127 changer transitions 0/218 dead transitions. [2024-06-27 23:51:09,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 218 transitions, 3032 flow [2024-06-27 23:51:09,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:51:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:51:09,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 23:51:09,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 23:51:09,715 INFO L175 Difference]: Start difference. First operand has 136 places, 188 transitions, 2349 flow. Second operand 8 states and 153 transitions. [2024-06-27 23:51:09,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 218 transitions, 3032 flow [2024-06-27 23:51:09,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 218 transitions, 2798 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 23:51:09,771 INFO L231 Difference]: Finished difference. Result has 139 places, 191 transitions, 2434 flow [2024-06-27 23:51:09,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2121, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2434, PETRI_PLACES=139, PETRI_TRANSITIONS=191} [2024-06-27 23:51:09,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-27 23:51:09,772 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 191 transitions, 2434 flow [2024-06-27 23:51:09,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:09,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:09,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:09,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 23:51:09,773 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:09,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:09,773 INFO L85 PathProgramCache]: Analyzing trace with hash 820107489, now seen corresponding path program 5 times [2024-06-27 23:51:09,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:09,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897466219] [2024-06-27 23:51:09,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:09,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:11,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:11,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897466219] [2024-06-27 23:51:11,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897466219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:11,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:11,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:11,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252284382] [2024-06-27 23:51:11,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:11,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:11,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:11,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:11,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:11,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:11,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 191 transitions, 2434 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:11,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:11,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:11,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:12,010 INFO L124 PetriNetUnfolderBase]: 1981/3095 cut-off events. [2024-06-27 23:51:12,011 INFO L125 PetriNetUnfolderBase]: For 79209/79209 co-relation queries the response was YES. [2024-06-27 23:51:12,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18306 conditions, 3095 events. 1981/3095 cut-off events. For 79209/79209 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 15606 event pairs, 505 based on Foata normal form. 4/3098 useless extension candidates. Maximal degree in co-relation 18236. Up to 2378 conditions per place. [2024-06-27 23:51:12,029 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 109 selfloop transitions, 114 changer transitions 0/228 dead transitions. [2024-06-27 23:51:12,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 228 transitions, 3288 flow [2024-06-27 23:51:12,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:51:12,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:51:12,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 23:51:12,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 23:51:12,031 INFO L175 Difference]: Start difference. First operand has 139 places, 191 transitions, 2434 flow. Second operand 8 states and 158 transitions. [2024-06-27 23:51:12,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 228 transitions, 3288 flow [2024-06-27 23:51:12,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 228 transitions, 3091 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 23:51:12,106 INFO L231 Difference]: Finished difference. Result has 142 places, 194 transitions, 2530 flow [2024-06-27 23:51:12,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2530, PETRI_PLACES=142, PETRI_TRANSITIONS=194} [2024-06-27 23:51:12,107 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-27 23:51:12,107 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 194 transitions, 2530 flow [2024-06-27 23:51:12,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:12,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:12,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:12,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 23:51:12,107 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:12,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:12,108 INFO L85 PathProgramCache]: Analyzing trace with hash 525190487, now seen corresponding path program 6 times [2024-06-27 23:51:12,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:12,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149872715] [2024-06-27 23:51:12,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:12,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:13,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:13,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149872715] [2024-06-27 23:51:13,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149872715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:13,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:13,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:13,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213207792] [2024-06-27 23:51:13,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:13,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:13,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:13,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:13,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:13,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:13,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 194 transitions, 2530 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:13,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:13,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:13,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:14,031 INFO L124 PetriNetUnfolderBase]: 1971/3081 cut-off events. [2024-06-27 23:51:14,031 INFO L125 PetriNetUnfolderBase]: For 83782/83782 co-relation queries the response was YES. [2024-06-27 23:51:14,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18265 conditions, 3081 events. 1971/3081 cut-off events. For 83782/83782 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 15467 event pairs, 503 based on Foata normal form. 4/3084 useless extension candidates. Maximal degree in co-relation 18193. Up to 2370 conditions per place. [2024-06-27 23:51:14,052 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 103 selfloop transitions, 116 changer transitions 0/224 dead transitions. [2024-06-27 23:51:14,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 224 transitions, 3207 flow [2024-06-27 23:51:14,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:51:14,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:51:14,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 23:51:14,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 23:51:14,053 INFO L175 Difference]: Start difference. First operand has 142 places, 194 transitions, 2530 flow. Second operand 8 states and 155 transitions. [2024-06-27 23:51:14,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 224 transitions, 3207 flow [2024-06-27 23:51:14,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 224 transitions, 3021 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 23:51:14,141 INFO L231 Difference]: Finished difference. Result has 147 places, 194 transitions, 2587 flow [2024-06-27 23:51:14,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2344, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2587, PETRI_PLACES=147, PETRI_TRANSITIONS=194} [2024-06-27 23:51:14,142 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-27 23:51:14,142 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 194 transitions, 2587 flow [2024-06-27 23:51:14,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:14,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:14,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:14,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 23:51:14,142 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:14,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:14,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1099613693, now seen corresponding path program 7 times [2024-06-27 23:51:14,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:14,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313649365] [2024-06-27 23:51:14,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:14,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:15,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:15,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313649365] [2024-06-27 23:51:15,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313649365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:15,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:15,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:15,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886683703] [2024-06-27 23:51:15,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:15,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:15,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:15,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:15,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:15,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:15,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 194 transitions, 2587 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:15,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:15,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:15,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:15,953 INFO L124 PetriNetUnfolderBase]: 2073/3236 cut-off events. [2024-06-27 23:51:15,954 INFO L125 PetriNetUnfolderBase]: For 94589/94591 co-relation queries the response was YES. [2024-06-27 23:51:15,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19431 conditions, 3236 events. 2073/3236 cut-off events. For 94589/94591 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16448 event pairs, 621 based on Foata normal form. 6/3241 useless extension candidates. Maximal degree in co-relation 19356. Up to 2851 conditions per place. [2024-06-27 23:51:15,976 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 168 selfloop transitions, 78 changer transitions 0/251 dead transitions. [2024-06-27 23:51:15,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 251 transitions, 3629 flow [2024-06-27 23:51:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:51:15,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:51:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-27 23:51:15,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-27 23:51:15,977 INFO L175 Difference]: Start difference. First operand has 147 places, 194 transitions, 2587 flow. Second operand 11 states and 200 transitions. [2024-06-27 23:51:15,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 251 transitions, 3629 flow [2024-06-27 23:51:16,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 251 transitions, 3402 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 23:51:16,082 INFO L231 Difference]: Finished difference. Result has 154 places, 210 transitions, 2795 flow [2024-06-27 23:51:16,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2375, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2795, PETRI_PLACES=154, PETRI_TRANSITIONS=210} [2024-06-27 23:51:16,083 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-27 23:51:16,083 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 210 transitions, 2795 flow [2024-06-27 23:51:16,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:16,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:16,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:16,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 23:51:16,083 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:16,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:16,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1307911901, now seen corresponding path program 8 times [2024-06-27 23:51:16,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:16,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096521094] [2024-06-27 23:51:16,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:16,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:17,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:17,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:17,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096521094] [2024-06-27 23:51:17,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096521094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:17,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:17,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:17,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406549926] [2024-06-27 23:51:17,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:17,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:17,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:17,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:17,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:17,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:17,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 210 transitions, 2795 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:17,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:17,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:17,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:17,993 INFO L124 PetriNetUnfolderBase]: 2085/3260 cut-off events. [2024-06-27 23:51:17,993 INFO L125 PetriNetUnfolderBase]: For 99451/99453 co-relation queries the response was YES. [2024-06-27 23:51:18,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19530 conditions, 3260 events. 2085/3260 cut-off events. For 99451/99453 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16613 event pairs, 615 based on Foata normal form. 8/3267 useless extension candidates. Maximal degree in co-relation 19452. Up to 2945 conditions per place. [2024-06-27 23:51:18,014 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 178 selfloop transitions, 61 changer transitions 0/244 dead transitions. [2024-06-27 23:51:18,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 244 transitions, 3485 flow [2024-06-27 23:51:18,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:51:18,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:51:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 23:51:18,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 23:51:18,015 INFO L175 Difference]: Start difference. First operand has 154 places, 210 transitions, 2795 flow. Second operand 9 states and 163 transitions. [2024-06-27 23:51:18,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 244 transitions, 3485 flow [2024-06-27 23:51:18,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 244 transitions, 3337 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-27 23:51:18,148 INFO L231 Difference]: Finished difference. Result has 158 places, 216 transitions, 2906 flow [2024-06-27 23:51:18,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2677, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2906, PETRI_PLACES=158, PETRI_TRANSITIONS=216} [2024-06-27 23:51:18,153 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-27 23:51:18,153 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 216 transitions, 2906 flow [2024-06-27 23:51:18,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:18,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:18,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:18,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 23:51:18,154 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:18,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:18,154 INFO L85 PathProgramCache]: Analyzing trace with hash -132271527, now seen corresponding path program 9 times [2024-06-27 23:51:18,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:18,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814531263] [2024-06-27 23:51:18,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:18,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:19,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:19,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814531263] [2024-06-27 23:51:19,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814531263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:19,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:19,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:19,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941603644] [2024-06-27 23:51:19,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:19,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:19,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:19,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:19,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:19,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:19,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 216 transitions, 2906 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:19,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:19,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:19,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:20,294 INFO L124 PetriNetUnfolderBase]: 2205/3442 cut-off events. [2024-06-27 23:51:20,294 INFO L125 PetriNetUnfolderBase]: For 106191/106191 co-relation queries the response was YES. [2024-06-27 23:51:20,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20532 conditions, 3442 events. 2205/3442 cut-off events. For 106191/106191 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17683 event pairs, 552 based on Foata normal form. 4/3444 useless extension candidates. Maximal degree in co-relation 20452. Up to 2583 conditions per place. [2024-06-27 23:51:20,320 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 101 selfloop transitions, 171 changer transitions 0/277 dead transitions. [2024-06-27 23:51:20,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 277 transitions, 3975 flow [2024-06-27 23:51:20,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:51:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:51:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 23:51:20,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-27 23:51:20,321 INFO L175 Difference]: Start difference. First operand has 158 places, 216 transitions, 2906 flow. Second operand 9 states and 176 transitions. [2024-06-27 23:51:20,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 277 transitions, 3975 flow [2024-06-27 23:51:20,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 277 transitions, 3877 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 23:51:20,457 INFO L231 Difference]: Finished difference. Result has 162 places, 242 transitions, 3483 flow [2024-06-27 23:51:20,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2808, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3483, PETRI_PLACES=162, PETRI_TRANSITIONS=242} [2024-06-27 23:51:20,458 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-27 23:51:20,458 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 242 transitions, 3483 flow [2024-06-27 23:51:20,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:20,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:20,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:20,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 23:51:20,459 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:20,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:20,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1307767751, now seen corresponding path program 10 times [2024-06-27 23:51:20,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:20,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420820764] [2024-06-27 23:51:20,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:20,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:21,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:21,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420820764] [2024-06-27 23:51:21,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420820764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:21,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:21,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:21,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145590057] [2024-06-27 23:51:21,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:21,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:21,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:21,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:21,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:21,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:21,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 242 transitions, 3483 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:21,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:21,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:21,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:22,436 INFO L124 PetriNetUnfolderBase]: 2195/3428 cut-off events. [2024-06-27 23:51:22,436 INFO L125 PetriNetUnfolderBase]: For 113897/113897 co-relation queries the response was YES. [2024-06-27 23:51:22,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21308 conditions, 3428 events. 2195/3428 cut-off events. For 113897/113897 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17555 event pairs, 550 based on Foata normal form. 4/3430 useless extension candidates. Maximal degree in co-relation 21226. Up to 2575 conditions per place. [2024-06-27 23:51:22,462 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 106 selfloop transitions, 165 changer transitions 0/276 dead transitions. [2024-06-27 23:51:22,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 276 transitions, 4181 flow [2024-06-27 23:51:22,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:51:22,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:51:22,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 23:51:22,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-27 23:51:22,464 INFO L175 Difference]: Start difference. First operand has 162 places, 242 transitions, 3483 flow. Second operand 9 states and 176 transitions. [2024-06-27 23:51:22,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 276 transitions, 4181 flow [2024-06-27 23:51:22,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 276 transitions, 3696 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-27 23:51:22,629 INFO L231 Difference]: Finished difference. Result has 165 places, 242 transitions, 3350 flow [2024-06-27 23:51:22,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3008, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3350, PETRI_PLACES=165, PETRI_TRANSITIONS=242} [2024-06-27 23:51:22,636 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-27 23:51:22,637 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 242 transitions, 3350 flow [2024-06-27 23:51:22,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:22,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:22,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:22,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 23:51:22,637 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:22,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:22,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1667367378, now seen corresponding path program 1 times [2024-06-27 23:51:22,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:22,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451274233] [2024-06-27 23:51:22,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:22,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:23,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:23,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451274233] [2024-06-27 23:51:23,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451274233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:23,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:23,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:51:23,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130963060] [2024-06-27 23:51:23,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:23,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:51:23,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:23,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:51:23,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:51:23,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:51:23,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 242 transitions, 3350 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:23,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:23,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:51:23,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:24,120 INFO L124 PetriNetUnfolderBase]: 1997/3186 cut-off events. [2024-06-27 23:51:24,120 INFO L125 PetriNetUnfolderBase]: For 115022/115047 co-relation queries the response was YES. [2024-06-27 23:51:24,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20164 conditions, 3186 events. 1997/3186 cut-off events. For 115022/115047 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16826 event pairs, 676 based on Foata normal form. 3/3143 useless extension candidates. Maximal degree in co-relation 20081. Up to 2921 conditions per place. [2024-06-27 23:51:24,142 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 216 selfloop transitions, 13 changer transitions 0/253 dead transitions. [2024-06-27 23:51:24,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 253 transitions, 3864 flow [2024-06-27 23:51:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:51:24,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:51:24,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 23:51:24,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 23:51:24,143 INFO L175 Difference]: Start difference. First operand has 165 places, 242 transitions, 3350 flow. Second operand 7 states and 116 transitions. [2024-06-27 23:51:24,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 253 transitions, 3864 flow [2024-06-27 23:51:24,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 253 transitions, 3426 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 23:51:24,278 INFO L231 Difference]: Finished difference. Result has 163 places, 245 transitions, 2974 flow [2024-06-27 23:51:24,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2912, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2974, PETRI_PLACES=163, PETRI_TRANSITIONS=245} [2024-06-27 23:51:24,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-27 23:51:24,279 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 245 transitions, 2974 flow [2024-06-27 23:51:24,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:24,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:24,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:24,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 23:51:24,280 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:24,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:24,280 INFO L85 PathProgramCache]: Analyzing trace with hash -627578110, now seen corresponding path program 1 times [2024-06-27 23:51:24,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:24,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044532906] [2024-06-27 23:51:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:24,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:25,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:25,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044532906] [2024-06-27 23:51:25,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044532906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:25,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:25,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:25,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414698759] [2024-06-27 23:51:25,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:25,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:25,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:25,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:25,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:25,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:25,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 245 transitions, 2974 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:25,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:25,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:25,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:26,756 INFO L124 PetriNetUnfolderBase]: 2272/3537 cut-off events. [2024-06-27 23:51:26,756 INFO L125 PetriNetUnfolderBase]: For 135309/135309 co-relation queries the response was YES. [2024-06-27 23:51:26,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22156 conditions, 3537 events. 2272/3537 cut-off events. For 135309/135309 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18285 event pairs, 624 based on Foata normal form. 4/3540 useless extension candidates. Maximal degree in co-relation 22073. Up to 3211 conditions per place. [2024-06-27 23:51:26,782 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 214 selfloop transitions, 49 changer transitions 0/269 dead transitions. [2024-06-27 23:51:26,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 269 transitions, 3620 flow [2024-06-27 23:51:26,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:51:26,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:51:26,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 23:51:26,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 23:51:26,785 INFO L175 Difference]: Start difference. First operand has 163 places, 245 transitions, 2974 flow. Second operand 9 states and 155 transitions. [2024-06-27 23:51:26,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 269 transitions, 3620 flow [2024-06-27 23:51:26,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 269 transitions, 3580 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 23:51:26,937 INFO L231 Difference]: Finished difference. Result has 167 places, 247 transitions, 3082 flow [2024-06-27 23:51:26,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2934, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3082, PETRI_PLACES=167, PETRI_TRANSITIONS=247} [2024-06-27 23:51:26,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-27 23:51:26,939 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 247 transitions, 3082 flow [2024-06-27 23:51:26,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:26,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:26,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:26,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 23:51:26,939 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:26,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:26,940 INFO L85 PathProgramCache]: Analyzing trace with hash -630435070, now seen corresponding path program 2 times [2024-06-27 23:51:26,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:26,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038568874] [2024-06-27 23:51:26,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:26,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:28,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:28,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038568874] [2024-06-27 23:51:28,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038568874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:28,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:28,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:28,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214288708] [2024-06-27 23:51:28,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:28,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:28,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:28,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:28,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:28,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:28,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 247 transitions, 3082 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:28,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:28,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:28,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:29,480 INFO L124 PetriNetUnfolderBase]: 2307/3594 cut-off events. [2024-06-27 23:51:29,481 INFO L125 PetriNetUnfolderBase]: For 144482/144482 co-relation queries the response was YES. [2024-06-27 23:51:29,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22934 conditions, 3594 events. 2307/3594 cut-off events. For 144482/144482 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18664 event pairs, 617 based on Foata normal form. 4/3597 useless extension candidates. Maximal degree in co-relation 22850. Up to 3217 conditions per place. [2024-06-27 23:51:29,512 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 220 selfloop transitions, 53 changer transitions 0/279 dead transitions. [2024-06-27 23:51:29,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 279 transitions, 3788 flow [2024-06-27 23:51:29,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:51:29,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:51:29,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 23:51:29,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-27 23:51:29,514 INFO L175 Difference]: Start difference. First operand has 167 places, 247 transitions, 3082 flow. Second operand 10 states and 173 transitions. [2024-06-27 23:51:29,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 279 transitions, 3788 flow [2024-06-27 23:51:29,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 279 transitions, 3664 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 23:51:29,683 INFO L231 Difference]: Finished difference. Result has 171 places, 251 transitions, 3138 flow [2024-06-27 23:51:29,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2958, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3138, PETRI_PLACES=171, PETRI_TRANSITIONS=251} [2024-06-27 23:51:29,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-27 23:51:29,683 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 251 transitions, 3138 flow [2024-06-27 23:51:29,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:29,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:29,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:29,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 23:51:29,684 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:29,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:29,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1033064382, now seen corresponding path program 3 times [2024-06-27 23:51:29,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:29,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324552483] [2024-06-27 23:51:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:29,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:31,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:31,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324552483] [2024-06-27 23:51:31,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324552483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:31,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:31,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:31,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676330354] [2024-06-27 23:51:31,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:31,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:31,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:31,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:31,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:31,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:31,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 251 transitions, 3138 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:31,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:31,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:31,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:32,091 INFO L124 PetriNetUnfolderBase]: 2324/3617 cut-off events. [2024-06-27 23:51:32,091 INFO L125 PetriNetUnfolderBase]: For 153833/153835 co-relation queries the response was YES. [2024-06-27 23:51:32,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23510 conditions, 3617 events. 2324/3617 cut-off events. For 153833/153835 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 18838 event pairs, 646 based on Foata normal form. 6/3622 useless extension candidates. Maximal degree in co-relation 23424. Up to 3186 conditions per place. [2024-06-27 23:51:32,118 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 180 selfloop transitions, 90 changer transitions 0/276 dead transitions. [2024-06-27 23:51:32,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 276 transitions, 3834 flow [2024-06-27 23:51:32,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:51:32,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:51:32,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 23:51:32,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 23:51:32,120 INFO L175 Difference]: Start difference. First operand has 171 places, 251 transitions, 3138 flow. Second operand 9 states and 158 transitions. [2024-06-27 23:51:32,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 276 transitions, 3834 flow [2024-06-27 23:51:32,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 276 transitions, 3706 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 23:51:32,292 INFO L231 Difference]: Finished difference. Result has 173 places, 253 transitions, 3247 flow [2024-06-27 23:51:32,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3010, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3247, PETRI_PLACES=173, PETRI_TRANSITIONS=253} [2024-06-27 23:51:32,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-27 23:51:32,293 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 253 transitions, 3247 flow [2024-06-27 23:51:32,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:32,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:32,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:32,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 23:51:32,294 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:32,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:32,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1033249080, now seen corresponding path program 1 times [2024-06-27 23:51:32,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:32,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310134512] [2024-06-27 23:51:32,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:32,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:34,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:34,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310134512] [2024-06-27 23:51:34,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310134512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:34,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:34,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:51:34,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764669976] [2024-06-27 23:51:34,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:34,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:51:34,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:34,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:51:34,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:51:34,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:34,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 253 transitions, 3247 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:34,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:34,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:34,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:35,004 INFO L124 PetriNetUnfolderBase]: 2341/3654 cut-off events. [2024-06-27 23:51:35,004 INFO L125 PetriNetUnfolderBase]: For 163742/163744 co-relation queries the response was YES. [2024-06-27 23:51:35,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24100 conditions, 3654 events. 2341/3654 cut-off events. For 163742/163744 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 19131 event pairs, 590 based on Foata normal form. 6/3658 useless extension candidates. Maximal degree in co-relation 24013. Up to 3209 conditions per place. [2024-06-27 23:51:35,034 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 214 selfloop transitions, 61 changer transitions 0/281 dead transitions. [2024-06-27 23:51:35,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 281 transitions, 3949 flow [2024-06-27 23:51:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:51:35,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:51:35,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 23:51:35,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 23:51:35,036 INFO L175 Difference]: Start difference. First operand has 173 places, 253 transitions, 3247 flow. Second operand 9 states and 159 transitions. [2024-06-27 23:51:35,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 281 transitions, 3949 flow [2024-06-27 23:51:35,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 281 transitions, 3700 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 23:51:35,320 INFO L231 Difference]: Finished difference. Result has 174 places, 255 transitions, 3171 flow [2024-06-27 23:51:35,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2998, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3171, PETRI_PLACES=174, PETRI_TRANSITIONS=255} [2024-06-27 23:51:35,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-27 23:51:35,321 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 255 transitions, 3171 flow [2024-06-27 23:51:35,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:35,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:35,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:35,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 23:51:35,322 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:35,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:35,322 INFO L85 PathProgramCache]: Analyzing trace with hash -776945255, now seen corresponding path program 1 times [2024-06-27 23:51:35,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:35,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984153780] [2024-06-27 23:51:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:35,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:36,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:36,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984153780] [2024-06-27 23:51:36,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984153780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:36,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:36,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:51:36,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644522197] [2024-06-27 23:51:36,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:36,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:51:36,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:36,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:51:36,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:51:36,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:51:36,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 255 transitions, 3171 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:36,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:36,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:51:36,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:36,746 INFO L124 PetriNetUnfolderBase]: 2191/3443 cut-off events. [2024-06-27 23:51:36,746 INFO L125 PetriNetUnfolderBase]: For 167849/167873 co-relation queries the response was YES. [2024-06-27 23:51:36,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23397 conditions, 3443 events. 2191/3443 cut-off events. For 167849/167873 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18164 event pairs, 605 based on Foata normal form. 2/3402 useless extension candidates. Maximal degree in co-relation 23310. Up to 3099 conditions per place. [2024-06-27 23:51:36,774 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 207 selfloop transitions, 36 changer transitions 0/269 dead transitions. [2024-06-27 23:51:36,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 269 transitions, 3727 flow [2024-06-27 23:51:36,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:51:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:51:36,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-27 23:51:36,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 23:51:36,775 INFO L175 Difference]: Start difference. First operand has 174 places, 255 transitions, 3171 flow. Second operand 6 states and 112 transitions. [2024-06-27 23:51:36,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 269 transitions, 3727 flow [2024-06-27 23:51:37,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 269 transitions, 3505 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-27 23:51:37,020 INFO L231 Difference]: Finished difference. Result has 171 places, 258 transitions, 3065 flow [2024-06-27 23:51:37,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3065, PETRI_PLACES=171, PETRI_TRANSITIONS=258} [2024-06-27 23:51:37,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-27 23:51:37,021 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 258 transitions, 3065 flow [2024-06-27 23:51:37,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:37,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:37,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:37,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 23:51:37,021 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:37,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:37,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1213604236, now seen corresponding path program 4 times [2024-06-27 23:51:37,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:37,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853926190] [2024-06-27 23:51:37,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:37,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:38,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:38,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853926190] [2024-06-27 23:51:38,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853926190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:38,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:38,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:38,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266969499] [2024-06-27 23:51:38,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:38,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:38,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:38,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:38,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:38,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:38,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 258 transitions, 3065 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:38,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:38,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:38,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:39,514 INFO L124 PetriNetUnfolderBase]: 2393/3708 cut-off events. [2024-06-27 23:51:39,515 INFO L125 PetriNetUnfolderBase]: For 177840/177840 co-relation queries the response was YES. [2024-06-27 23:51:39,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25047 conditions, 3708 events. 2393/3708 cut-off events. For 177840/177840 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 19229 event pairs, 642 based on Foata normal form. 4/3711 useless extension candidates. Maximal degree in co-relation 24960. Up to 3282 conditions per place. [2024-06-27 23:51:39,541 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 184 selfloop transitions, 93 changer transitions 0/283 dead transitions. [2024-06-27 23:51:39,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 283 transitions, 3791 flow [2024-06-27 23:51:39,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:51:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:51:39,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 23:51:39,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 23:51:39,557 INFO L175 Difference]: Start difference. First operand has 171 places, 258 transitions, 3065 flow. Second operand 9 states and 155 transitions. [2024-06-27 23:51:39,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 283 transitions, 3791 flow [2024-06-27 23:51:39,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 283 transitions, 3705 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 23:51:39,749 INFO L231 Difference]: Finished difference. Result has 176 places, 260 transitions, 3227 flow [2024-06-27 23:51:39,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3227, PETRI_PLACES=176, PETRI_TRANSITIONS=260} [2024-06-27 23:51:39,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-27 23:51:39,750 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 260 transitions, 3227 flow [2024-06-27 23:51:39,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:39,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:39,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:39,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 23:51:39,751 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:39,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:39,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1441690084, now seen corresponding path program 2 times [2024-06-27 23:51:39,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:39,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651053029] [2024-06-27 23:51:39,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:39,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:41,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:41,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651053029] [2024-06-27 23:51:41,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651053029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:41,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:41,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:51:41,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21542717] [2024-06-27 23:51:41,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:41,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:51:41,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:41,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:51:41,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:51:41,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:41,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 260 transitions, 3227 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:41,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:41,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:41,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:42,531 INFO L124 PetriNetUnfolderBase]: 2410/3744 cut-off events. [2024-06-27 23:51:42,532 INFO L125 PetriNetUnfolderBase]: For 188910/188914 co-relation queries the response was YES. [2024-06-27 23:51:42,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25792 conditions, 3744 events. 2410/3744 cut-off events. For 188910/188914 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 19517 event pairs, 583 based on Foata normal form. 8/3751 useless extension candidates. Maximal degree in co-relation 25704. Up to 3305 conditions per place. [2024-06-27 23:51:42,561 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 216 selfloop transitions, 65 changer transitions 0/287 dead transitions. [2024-06-27 23:51:42,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 287 transitions, 3953 flow [2024-06-27 23:51:42,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:51:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:51:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 23:51:42,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 23:51:42,563 INFO L175 Difference]: Start difference. First operand has 176 places, 260 transitions, 3227 flow. Second operand 9 states and 155 transitions. [2024-06-27 23:51:42,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 287 transitions, 3953 flow [2024-06-27 23:51:42,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 287 transitions, 3632 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-27 23:51:42,793 INFO L231 Difference]: Finished difference. Result has 176 places, 262 transitions, 3092 flow [2024-06-27 23:51:42,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2906, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3092, PETRI_PLACES=176, PETRI_TRANSITIONS=262} [2024-06-27 23:51:42,794 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-27 23:51:42,794 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 262 transitions, 3092 flow [2024-06-27 23:51:42,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:42,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:42,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:42,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 23:51:42,795 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:42,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:42,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1450260964, now seen corresponding path program 3 times [2024-06-27 23:51:42,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:42,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169654851] [2024-06-27 23:51:42,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:42,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:44,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:44,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:44,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169654851] [2024-06-27 23:51:44,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169654851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:44,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:44,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:44,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96121797] [2024-06-27 23:51:44,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:44,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:44,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:44,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:44,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:44,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:44,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 262 transitions, 3092 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:44,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:44,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:44,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:45,297 INFO L124 PetriNetUnfolderBase]: 2427/3771 cut-off events. [2024-06-27 23:51:45,298 INFO L125 PetriNetUnfolderBase]: For 197356/197360 co-relation queries the response was YES. [2024-06-27 23:51:45,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26190 conditions, 3771 events. 2427/3771 cut-off events. For 197356/197360 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 19786 event pairs, 548 based on Foata normal form. 8/3778 useless extension candidates. Maximal degree in co-relation 26102. Up to 3235 conditions per place. [2024-06-27 23:51:45,328 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 215 selfloop transitions, 72 changer transitions 0/293 dead transitions. [2024-06-27 23:51:45,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 293 transitions, 4034 flow [2024-06-27 23:51:45,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:51:45,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:51:45,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 23:51:45,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 23:51:45,330 INFO L175 Difference]: Start difference. First operand has 176 places, 262 transitions, 3092 flow. Second operand 9 states and 157 transitions. [2024-06-27 23:51:45,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 293 transitions, 4034 flow [2024-06-27 23:51:45,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 293 transitions, 3868 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 23:51:45,573 INFO L231 Difference]: Finished difference. Result has 178 places, 266 transitions, 3177 flow [2024-06-27 23:51:45,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2926, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3177, PETRI_PLACES=178, PETRI_TRANSITIONS=266} [2024-06-27 23:51:45,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-27 23:51:45,573 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 266 transitions, 3177 flow [2024-06-27 23:51:45,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:45,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:45,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:45,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 23:51:45,574 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:45,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:45,574 INFO L85 PathProgramCache]: Analyzing trace with hash -898782598, now seen corresponding path program 4 times [2024-06-27 23:51:45,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:45,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443410046] [2024-06-27 23:51:45,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:45,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:47,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:47,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443410046] [2024-06-27 23:51:47,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443410046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:47,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:47,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:51:47,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752907013] [2024-06-27 23:51:47,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:47,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:51:47,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:47,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:51:47,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:51:47,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:47,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 266 transitions, 3177 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:47,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:47,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:47,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:48,155 INFO L124 PetriNetUnfolderBase]: 2444/3800 cut-off events. [2024-06-27 23:51:48,155 INFO L125 PetriNetUnfolderBase]: For 207649/207653 co-relation queries the response was YES. [2024-06-27 23:51:48,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26753 conditions, 3800 events. 2444/3800 cut-off events. For 207649/207653 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19907 event pairs, 583 based on Foata normal form. 8/3807 useless extension candidates. Maximal degree in co-relation 26664. Up to 3359 conditions per place. [2024-06-27 23:51:48,189 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 228 selfloop transitions, 61 changer transitions 0/295 dead transitions. [2024-06-27 23:51:48,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 295 transitions, 3943 flow [2024-06-27 23:51:48,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:51:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:51:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 23:51:48,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 23:51:48,191 INFO L175 Difference]: Start difference. First operand has 178 places, 266 transitions, 3177 flow. Second operand 9 states and 157 transitions. [2024-06-27 23:51:48,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 295 transitions, 3943 flow [2024-06-27 23:51:48,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 295 transitions, 3799 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 23:51:48,410 INFO L231 Difference]: Finished difference. Result has 182 places, 268 transitions, 3219 flow [2024-06-27 23:51:48,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3045, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3219, PETRI_PLACES=182, PETRI_TRANSITIONS=268} [2024-06-27 23:51:48,418 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-27 23:51:48,418 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 268 transitions, 3219 flow [2024-06-27 23:51:48,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:48,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:48,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:48,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 23:51:48,419 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:48,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:48,419 INFO L85 PathProgramCache]: Analyzing trace with hash -765517415, now seen corresponding path program 2 times [2024-06-27 23:51:48,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:48,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36122662] [2024-06-27 23:51:48,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:48,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:49,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:49,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36122662] [2024-06-27 23:51:49,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36122662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:49,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:49,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:51:49,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073643180] [2024-06-27 23:51:49,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:49,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:51:49,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:49,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:51:49,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:51:49,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:51:49,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 268 transitions, 3219 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:49,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:49,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:51:49,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:49,988 INFO L124 PetriNetUnfolderBase]: 2254/3545 cut-off events. [2024-06-27 23:51:49,988 INFO L125 PetriNetUnfolderBase]: For 212457/212482 co-relation queries the response was YES. [2024-06-27 23:51:50,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25628 conditions, 3545 events. 2254/3545 cut-off events. For 212457/212482 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 18844 event pairs, 618 based on Foata normal form. 2/3501 useless extension candidates. Maximal degree in co-relation 25537. Up to 3171 conditions per place. [2024-06-27 23:51:50,072 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 209 selfloop transitions, 44 changer transitions 0/283 dead transitions. [2024-06-27 23:51:50,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 283 transitions, 3907 flow [2024-06-27 23:51:50,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:51:50,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:51:50,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 23:51:50,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 23:51:50,074 INFO L175 Difference]: Start difference. First operand has 182 places, 268 transitions, 3219 flow. Second operand 6 states and 110 transitions. [2024-06-27 23:51:50,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 283 transitions, 3907 flow [2024-06-27 23:51:50,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 283 transitions, 3709 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-27 23:51:50,292 INFO L231 Difference]: Finished difference. Result has 179 places, 274 transitions, 3189 flow [2024-06-27 23:51:50,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3021, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3189, PETRI_PLACES=179, PETRI_TRANSITIONS=274} [2024-06-27 23:51:50,292 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-27 23:51:50,293 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 274 transitions, 3189 flow [2024-06-27 23:51:50,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:50,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:50,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:50,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 23:51:50,293 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:50,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:50,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1876848258, now seen corresponding path program 5 times [2024-06-27 23:51:50,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:50,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716457896] [2024-06-27 23:51:50,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:50,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:51,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:51,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716457896] [2024-06-27 23:51:51,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716457896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:51,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:51,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:51,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009767511] [2024-06-27 23:51:51,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:51,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:51,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:51,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:51,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:51,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:51,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 274 transitions, 3189 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:51,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:51,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:51,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:52,184 INFO L124 PetriNetUnfolderBase]: 2547/3969 cut-off events. [2024-06-27 23:51:52,184 INFO L125 PetriNetUnfolderBase]: For 229658/229660 co-relation queries the response was YES. [2024-06-27 23:51:52,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28398 conditions, 3969 events. 2547/3969 cut-off events. For 229658/229660 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21149 event pairs, 660 based on Foata normal form. 6/3974 useless extension candidates. Maximal degree in co-relation 28307. Up to 3518 conditions per place. [2024-06-27 23:51:52,222 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 246 selfloop transitions, 76 changer transitions 0/328 dead transitions. [2024-06-27 23:51:52,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 328 transitions, 4333 flow [2024-06-27 23:51:52,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:51:52,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:51:52,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-27 23:51:52,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:51:52,224 INFO L175 Difference]: Start difference. First operand has 179 places, 274 transitions, 3189 flow. Second operand 11 states and 198 transitions. [2024-06-27 23:51:52,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 328 transitions, 4333 flow [2024-06-27 23:51:52,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 328 transitions, 4265 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 23:51:52,457 INFO L231 Difference]: Finished difference. Result has 189 places, 286 transitions, 3481 flow [2024-06-27 23:51:52,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3121, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3481, PETRI_PLACES=189, PETRI_TRANSITIONS=286} [2024-06-27 23:51:52,472 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-27 23:51:52,472 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 286 transitions, 3481 flow [2024-06-27 23:51:52,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:52,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:52,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:52,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 23:51:52,477 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:52,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:52,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1930037990, now seen corresponding path program 6 times [2024-06-27 23:51:52,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:52,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117313785] [2024-06-27 23:51:52,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:52,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:53,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:53,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:53,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117313785] [2024-06-27 23:51:53,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117313785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:53,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:53,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:53,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030117523] [2024-06-27 23:51:53,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:53,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:53,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:53,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:53,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:53,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:53,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 286 transitions, 3481 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:53,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:53,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:53,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:54,508 INFO L124 PetriNetUnfolderBase]: 2566/4006 cut-off events. [2024-06-27 23:51:54,508 INFO L125 PetriNetUnfolderBase]: For 241308/241310 co-relation queries the response was YES. [2024-06-27 23:51:54,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29304 conditions, 4006 events. 2566/4006 cut-off events. For 241308/241310 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 21505 event pairs, 689 based on Foata normal form. 6/4011 useless extension candidates. Maximal degree in co-relation 29210. Up to 3630 conditions per place. [2024-06-27 23:51:54,546 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 252 selfloop transitions, 68 changer transitions 0/326 dead transitions. [2024-06-27 23:51:54,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 326 transitions, 4359 flow [2024-06-27 23:51:54,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:51:54,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:51:54,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-27 23:51:54,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-27 23:51:54,548 INFO L175 Difference]: Start difference. First operand has 189 places, 286 transitions, 3481 flow. Second operand 11 states and 192 transitions. [2024-06-27 23:51:54,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 326 transitions, 4359 flow [2024-06-27 23:51:54,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 326 transitions, 4199 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 23:51:54,869 INFO L231 Difference]: Finished difference. Result has 193 places, 290 transitions, 3558 flow [2024-06-27 23:51:54,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3335, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3558, PETRI_PLACES=193, PETRI_TRANSITIONS=290} [2024-06-27 23:51:54,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-27 23:51:54,870 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 290 transitions, 3558 flow [2024-06-27 23:51:54,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:54,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:54,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:54,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 23:51:54,870 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:54,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:54,871 INFO L85 PathProgramCache]: Analyzing trace with hash 279961192, now seen corresponding path program 7 times [2024-06-27 23:51:54,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:54,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520309129] [2024-06-27 23:51:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:54,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:55,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:55,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520309129] [2024-06-27 23:51:55,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520309129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:55,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:55,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:51:55,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399957204] [2024-06-27 23:51:55,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:55,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:51:55,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:55,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:51:55,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:51:55,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:51:55,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 290 transitions, 3558 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:55,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:55,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:51:55,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:56,514 INFO L124 PetriNetUnfolderBase]: 2192/3693 cut-off events. [2024-06-27 23:51:56,514 INFO L125 PetriNetUnfolderBase]: For 228069/228113 co-relation queries the response was YES. [2024-06-27 23:51:56,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26553 conditions, 3693 events. 2192/3693 cut-off events. For 228069/228113 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21725 event pairs, 418 based on Foata normal form. 47/3730 useless extension candidates. Maximal degree in co-relation 26457. Up to 2645 conditions per place. [2024-06-27 23:51:56,549 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 167 selfloop transitions, 92 changer transitions 0/345 dead transitions. [2024-06-27 23:51:56,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 345 transitions, 4756 flow [2024-06-27 23:51:56,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:51:56,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:51:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-27 23:51:56,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-27 23:51:56,551 INFO L175 Difference]: Start difference. First operand has 193 places, 290 transitions, 3558 flow. Second operand 10 states and 203 transitions. [2024-06-27 23:51:56,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 345 transitions, 4756 flow [2024-06-27 23:51:56,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 345 transitions, 4591 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-27 23:51:56,812 INFO L231 Difference]: Finished difference. Result has 196 places, 308 transitions, 3941 flow [2024-06-27 23:51:56,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3393, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3941, PETRI_PLACES=196, PETRI_TRANSITIONS=308} [2024-06-27 23:51:56,812 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-27 23:51:56,813 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 308 transitions, 3941 flow [2024-06-27 23:51:56,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:56,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:56,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:56,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 23:51:56,814 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:56,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:56,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1434820040, now seen corresponding path program 8 times [2024-06-27 23:51:56,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:56,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534485852] [2024-06-27 23:51:56,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:56,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:57,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:57,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534485852] [2024-06-27 23:51:57,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534485852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:57,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:57,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:51:57,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355176747] [2024-06-27 23:51:57,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:57,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:51:57,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:57,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:51:57,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:51:58,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:51:58,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 308 transitions, 3941 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:58,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:58,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:51:58,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:59,021 INFO L124 PetriNetUnfolderBase]: 2802/4374 cut-off events. [2024-06-27 23:51:59,021 INFO L125 PetriNetUnfolderBase]: For 277849/277851 co-relation queries the response was YES. [2024-06-27 23:51:59,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33057 conditions, 4374 events. 2802/4374 cut-off events. For 277849/277851 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23915 event pairs, 690 based on Foata normal form. 8/4381 useless extension candidates. Maximal degree in co-relation 32958. Up to 3869 conditions per place. [2024-06-27 23:51:59,061 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 282 selfloop transitions, 77 changer transitions 0/365 dead transitions. [2024-06-27 23:51:59,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 365 transitions, 5358 flow [2024-06-27 23:51:59,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:51:59,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:51:59,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-27 23:51:59,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 23:51:59,065 INFO L175 Difference]: Start difference. First operand has 196 places, 308 transitions, 3941 flow. Second operand 10 states and 182 transitions. [2024-06-27 23:51:59,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 365 transitions, 5358 flow [2024-06-27 23:51:59,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 365 transitions, 5171 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-06-27 23:51:59,484 INFO L231 Difference]: Finished difference. Result has 203 places, 328 transitions, 4355 flow [2024-06-27 23:51:59,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3830, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4355, PETRI_PLACES=203, PETRI_TRANSITIONS=328} [2024-06-27 23:51:59,484 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-27 23:51:59,484 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 328 transitions, 4355 flow [2024-06-27 23:51:59,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:51:59,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:59,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:59,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 23:51:59,485 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:59,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:59,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1437677000, now seen corresponding path program 9 times [2024-06-27 23:51:59,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:59,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117029769] [2024-06-27 23:51:59,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:59,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:00,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:00,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117029769] [2024-06-27 23:52:00,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117029769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:00,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:00,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:52:00,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506117053] [2024-06-27 23:52:00,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:00,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:52:00,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:00,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:52:00,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:52:00,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:52:00,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 328 transitions, 4355 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:52:00,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:00,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:52:00,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:01,824 INFO L124 PetriNetUnfolderBase]: 2784/4350 cut-off events. [2024-06-27 23:52:01,824 INFO L125 PetriNetUnfolderBase]: For 269134/269136 co-relation queries the response was YES. [2024-06-27 23:52:01,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32500 conditions, 4350 events. 2784/4350 cut-off events. For 269134/269136 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23826 event pairs, 713 based on Foata normal form. 10/4359 useless extension candidates. Maximal degree in co-relation 32399. Up to 3973 conditions per place. [2024-06-27 23:52:01,860 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 291 selfloop transitions, 59 changer transitions 0/356 dead transitions. [2024-06-27 23:52:01,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 356 transitions, 5174 flow [2024-06-27 23:52:01,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:52:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:52:01,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 23:52:01,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:52:01,862 INFO L175 Difference]: Start difference. First operand has 203 places, 328 transitions, 4355 flow. Second operand 9 states and 162 transitions. [2024-06-27 23:52:01,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 356 transitions, 5174 flow [2024-06-27 23:52:02,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 356 transitions, 4821 flow, removed 119 selfloop flow, removed 7 redundant places. [2024-06-27 23:52:02,313 INFO L231 Difference]: Finished difference. Result has 205 places, 328 transitions, 4138 flow [2024-06-27 23:52:02,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4002, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4138, PETRI_PLACES=205, PETRI_TRANSITIONS=328} [2024-06-27 23:52:02,313 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-27 23:52:02,314 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 328 transitions, 4138 flow [2024-06-27 23:52:02,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:52:02,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:02,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:02,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 23:52:02,314 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:02,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:02,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1886097826, now seen corresponding path program 10 times [2024-06-27 23:52:02,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:02,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29624335] [2024-06-27 23:52:02,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:02,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:03,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:03,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29624335] [2024-06-27 23:52:03,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29624335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:03,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:03,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:52:03,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681158056] [2024-06-27 23:52:03,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:03,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:52:03,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:03,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:52:03,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:52:03,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:52:03,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 328 transitions, 4138 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:52:03,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:03,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:52:03,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:04,513 INFO L124 PetriNetUnfolderBase]: 2787/4345 cut-off events. [2024-06-27 23:52:04,513 INFO L125 PetriNetUnfolderBase]: For 267706/267708 co-relation queries the response was YES. [2024-06-27 23:52:04,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31911 conditions, 4345 events. 2787/4345 cut-off events. For 267706/267708 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 23670 event pairs, 703 based on Foata normal form. 6/4350 useless extension candidates. Maximal degree in co-relation 31809. Up to 3893 conditions per place. [2024-06-27 23:52:04,557 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 257 selfloop transitions, 98 changer transitions 0/361 dead transitions. [2024-06-27 23:52:04,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 361 transitions, 5074 flow [2024-06-27 23:52:04,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:52:04,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:52:04,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 23:52:04,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 23:52:04,561 INFO L175 Difference]: Start difference. First operand has 205 places, 328 transitions, 4138 flow. Second operand 9 states and 165 transitions. [2024-06-27 23:52:04,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 361 transitions, 5074 flow [2024-06-27 23:52:04,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 361 transitions, 4964 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 23:52:04,974 INFO L231 Difference]: Finished difference. Result has 207 places, 332 transitions, 4312 flow [2024-06-27 23:52:04,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4028, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4312, PETRI_PLACES=207, PETRI_TRANSITIONS=332} [2024-06-27 23:52:04,975 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-27 23:52:04,975 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 332 transitions, 4312 flow [2024-06-27 23:52:04,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-27 23:52:04,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:04,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:04,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 23:52:04,975 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:04,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:04,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1885913128, now seen corresponding path program 5 times [2024-06-27 23:52:04,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:04,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021181076] [2024-06-27 23:52:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:04,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:06,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:06,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021181076] [2024-06-27 23:52:06,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021181076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:06,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:06,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:52:06,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361923967] [2024-06-27 23:52:06,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:06,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:52:06,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:06,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:52:06,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:52:06,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:52:06,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 332 transitions, 4312 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:06,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:06,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:52:06,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:07,427 INFO L124 PetriNetUnfolderBase]: 2790/4366 cut-off events. [2024-06-27 23:52:07,427 INFO L125 PetriNetUnfolderBase]: For 255496/255498 co-relation queries the response was YES. [2024-06-27 23:52:07,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31772 conditions, 4366 events. 2790/4366 cut-off events. For 255496/255498 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 23971 event pairs, 706 based on Foata normal form. 6/4370 useless extension candidates. Maximal degree in co-relation 31670. Up to 3894 conditions per place. [2024-06-27 23:52:07,471 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 296 selfloop transitions, 65 changer transitions 0/367 dead transitions. [2024-06-27 23:52:07,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 367 transitions, 5210 flow [2024-06-27 23:52:07,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:52:07,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:52:07,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 23:52:07,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 23:52:07,473 INFO L175 Difference]: Start difference. First operand has 207 places, 332 transitions, 4312 flow. Second operand 9 states and 169 transitions. [2024-06-27 23:52:07,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 367 transitions, 5210 flow [2024-06-27 23:52:07,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 367 transitions, 4944 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 23:52:07,970 INFO L231 Difference]: Finished difference. Result has 209 places, 334 transitions, 4202 flow [2024-06-27 23:52:07,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4046, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4202, PETRI_PLACES=209, PETRI_TRANSITIONS=334} [2024-06-27 23:52:07,971 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-27 23:52:07,971 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 334 transitions, 4202 flow [2024-06-27 23:52:07,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:07,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:07,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:07,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 23:52:07,972 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:07,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:07,973 INFO L85 PathProgramCache]: Analyzing trace with hash 366490969, now seen corresponding path program 3 times [2024-06-27 23:52:07,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:07,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755208727] [2024-06-27 23:52:07,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:07,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:08,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:08,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755208727] [2024-06-27 23:52:08,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755208727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:08,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:08,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:52:08,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421444162] [2024-06-27 23:52:08,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:08,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:52:08,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:08,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:52:08,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:52:08,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:52:08,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 334 transitions, 4202 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:08,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:08,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:52:08,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:09,651 INFO L124 PetriNetUnfolderBase]: 2591/4101 cut-off events. [2024-06-27 23:52:09,651 INFO L125 PetriNetUnfolderBase]: For 258044/258068 co-relation queries the response was YES. [2024-06-27 23:52:09,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30250 conditions, 4101 events. 2591/4101 cut-off events. For 258044/258068 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22861 event pairs, 682 based on Foata normal form. 3/4064 useless extension candidates. Maximal degree in co-relation 30147. Up to 3714 conditions per place. [2024-06-27 23:52:09,689 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 282 selfloop transitions, 41 changer transitions 0/354 dead transitions. [2024-06-27 23:52:09,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 354 transitions, 4944 flow [2024-06-27 23:52:09,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:52:09,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:52:09,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 23:52:09,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-27 23:52:09,690 INFO L175 Difference]: Start difference. First operand has 209 places, 334 transitions, 4202 flow. Second operand 7 states and 129 transitions. [2024-06-27 23:52:09,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 354 transitions, 4944 flow [2024-06-27 23:52:10,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 354 transitions, 4775 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 23:52:10,129 INFO L231 Difference]: Finished difference. Result has 208 places, 337 transitions, 4154 flow [2024-06-27 23:52:10,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4033, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4154, PETRI_PLACES=208, PETRI_TRANSITIONS=337} [2024-06-27 23:52:10,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-27 23:52:10,130 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 337 transitions, 4154 flow [2024-06-27 23:52:10,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:10,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:10,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:10,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 23:52:10,130 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:10,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:10,131 INFO L85 PathProgramCache]: Analyzing trace with hash 172697647, now seen corresponding path program 1 times [2024-06-27 23:52:10,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:10,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365943965] [2024-06-27 23:52:10,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:10,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:10,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:10,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365943965] [2024-06-27 23:52:10,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365943965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:10,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:10,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:52:10,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499471604] [2024-06-27 23:52:10,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:10,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:52:10,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:10,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:52:10,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:52:10,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:52:10,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 337 transitions, 4154 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:10,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:10,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:52:10,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:11,703 INFO L124 PetriNetUnfolderBase]: 2592/4145 cut-off events. [2024-06-27 23:52:11,703 INFO L125 PetriNetUnfolderBase]: For 233980/233980 co-relation queries the response was YES. [2024-06-27 23:52:11,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29249 conditions, 4145 events. 2592/4145 cut-off events. For 233980/233980 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 23389 event pairs, 823 based on Foata normal form. 1/4145 useless extension candidates. Maximal degree in co-relation 29145. Up to 3825 conditions per place. [2024-06-27 23:52:11,745 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 331 selfloop transitions, 13 changer transitions 0/351 dead transitions. [2024-06-27 23:52:11,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 351 transitions, 4946 flow [2024-06-27 23:52:11,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:52:11,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:52:11,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 23:52:11,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-27 23:52:11,759 INFO L175 Difference]: Start difference. First operand has 208 places, 337 transitions, 4154 flow. Second operand 6 states and 109 transitions. [2024-06-27 23:52:11,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 351 transitions, 4946 flow [2024-06-27 23:52:12,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 351 transitions, 4851 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 23:52:12,388 INFO L231 Difference]: Finished difference. Result has 208 places, 340 transitions, 4141 flow [2024-06-27 23:52:12,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4059, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4141, PETRI_PLACES=208, PETRI_TRANSITIONS=340} [2024-06-27 23:52:12,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-27 23:52:12,389 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 340 transitions, 4141 flow [2024-06-27 23:52:12,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:12,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:12,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:12,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 23:52:12,390 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:12,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:12,390 INFO L85 PathProgramCache]: Analyzing trace with hash 148774327, now seen corresponding path program 2 times [2024-06-27 23:52:12,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:12,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461295633] [2024-06-27 23:52:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:12,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:12,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:13,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:13,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461295633] [2024-06-27 23:52:13,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461295633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:13,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:13,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:52:13,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803614588] [2024-06-27 23:52:13,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:13,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:52:13,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:13,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:52:13,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:52:13,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:52:13,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 340 transitions, 4141 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:13,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:13,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:52:13,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:14,064 INFO L124 PetriNetUnfolderBase]: 2796/4369 cut-off events. [2024-06-27 23:52:14,065 INFO L125 PetriNetUnfolderBase]: For 277553/277555 co-relation queries the response was YES. [2024-06-27 23:52:14,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32132 conditions, 4369 events. 2796/4369 cut-off events. For 277553/277555 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 24023 event pairs, 911 based on Foata normal form. 3/4371 useless extension candidates. Maximal degree in co-relation 32027. Up to 4112 conditions per place. [2024-06-27 23:52:14,110 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 327 selfloop transitions, 18 changer transitions 0/351 dead transitions. [2024-06-27 23:52:14,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 351 transitions, 4917 flow [2024-06-27 23:52:14,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:52:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:52:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 23:52:14,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 23:52:14,111 INFO L175 Difference]: Start difference. First operand has 208 places, 340 transitions, 4141 flow. Second operand 7 states and 112 transitions. [2024-06-27 23:52:14,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 351 transitions, 4917 flow [2024-06-27 23:52:14,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 351 transitions, 4857 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 23:52:14,667 INFO L231 Difference]: Finished difference. Result has 211 places, 343 transitions, 4179 flow [2024-06-27 23:52:14,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4081, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4179, PETRI_PLACES=211, PETRI_TRANSITIONS=343} [2024-06-27 23:52:14,668 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-27 23:52:14,668 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 343 transitions, 4179 flow [2024-06-27 23:52:14,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:14,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:14,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:14,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 23:52:14,669 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:14,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:14,669 INFO L85 PathProgramCache]: Analyzing trace with hash 148782263, now seen corresponding path program 1 times [2024-06-27 23:52:14,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:14,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931352827] [2024-06-27 23:52:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:14,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:15,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:15,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931352827] [2024-06-27 23:52:15,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931352827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:15,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:15,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:52:15,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504019796] [2024-06-27 23:52:15,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:15,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:52:15,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:15,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:52:15,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:52:15,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:52:15,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 343 transitions, 4179 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-27 23:52:15,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:15,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:52:15,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:16,453 INFO L124 PetriNetUnfolderBase]: 2506/3999 cut-off events. [2024-06-27 23:52:16,453 INFO L125 PetriNetUnfolderBase]: For 247972/247998 co-relation queries the response was YES. [2024-06-27 23:52:16,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29112 conditions, 3999 events. 2506/3999 cut-off events. For 247972/247998 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22510 event pairs, 822 based on Foata normal form. 4/3957 useless extension candidates. Maximal degree in co-relation 29006. Up to 3673 conditions per place. [2024-06-27 23:52:16,496 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 16 changer transitions 0/355 dead transitions. [2024-06-27 23:52:16,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 355 transitions, 4903 flow [2024-06-27 23:52:16,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:52:16,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:52:16,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 23:52:16,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 23:52:16,497 INFO L175 Difference]: Start difference. First operand has 211 places, 343 transitions, 4179 flow. Second operand 8 states and 130 transitions. [2024-06-27 23:52:16,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 355 transitions, 4903 flow [2024-06-27 23:52:17,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 355 transitions, 4827 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 23:52:17,009 INFO L231 Difference]: Finished difference. Result has 214 places, 346 transitions, 4183 flow [2024-06-27 23:52:17,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4103, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4183, PETRI_PLACES=214, PETRI_TRANSITIONS=346} [2024-06-27 23:52:17,010 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-27 23:52:17,010 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 346 transitions, 4183 flow [2024-06-27 23:52:17,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-27 23:52:17,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:17,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:17,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 23:52:17,011 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:17,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:17,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1277662862, now seen corresponding path program 1 times [2024-06-27 23:52:17,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:17,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437983339] [2024-06-27 23:52:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:17,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:18,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:18,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437983339] [2024-06-27 23:52:18,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437983339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:18,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:18,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:52:18,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048747459] [2024-06-27 23:52:18,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:18,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:52:18,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:18,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:52:18,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:52:18,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:52:18,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 346 transitions, 4183 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:18,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:18,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:52:18,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:19,983 INFO L124 PetriNetUnfolderBase]: 2972/4638 cut-off events. [2024-06-27 23:52:19,984 INFO L125 PetriNetUnfolderBase]: For 338101/338101 co-relation queries the response was YES. [2024-06-27 23:52:20,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35753 conditions, 4638 events. 2972/4638 cut-off events. For 338101/338101 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25695 event pairs, 736 based on Foata normal form. 16/4647 useless extension candidates. Maximal degree in co-relation 35646. Up to 3919 conditions per place. [2024-06-27 23:52:20,038 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 313 selfloop transitions, 67 changer transitions 0/386 dead transitions. [2024-06-27 23:52:20,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 386 transitions, 5394 flow [2024-06-27 23:52:20,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:52:20,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:52:20,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 23:52:20,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-27 23:52:20,040 INFO L175 Difference]: Start difference. First operand has 214 places, 346 transitions, 4183 flow. Second operand 10 states and 181 transitions. [2024-06-27 23:52:20,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 386 transitions, 5394 flow [2024-06-27 23:52:20,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 386 transitions, 5336 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 23:52:20,678 INFO L231 Difference]: Finished difference. Result has 218 places, 348 transitions, 4359 flow [2024-06-27 23:52:20,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4125, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4359, PETRI_PLACES=218, PETRI_TRANSITIONS=348} [2024-06-27 23:52:20,679 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-27 23:52:20,679 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 348 transitions, 4359 flow [2024-06-27 23:52:20,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:20,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:20,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:20,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 23:52:20,680 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:20,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:20,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1517095242, now seen corresponding path program 2 times [2024-06-27 23:52:20,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:20,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073288450] [2024-06-27 23:52:20,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:20,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:22,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:22,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073288450] [2024-06-27 23:52:22,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073288450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:22,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:22,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:52:22,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586396775] [2024-06-27 23:52:22,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:22,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:52:22,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:22,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:52:22,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:52:22,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:52:22,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 348 transitions, 4359 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:22,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:22,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:52:22,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:23,534 INFO L124 PetriNetUnfolderBase]: 2936/4586 cut-off events. [2024-06-27 23:52:23,534 INFO L125 PetriNetUnfolderBase]: For 335314/335314 co-relation queries the response was YES. [2024-06-27 23:52:23,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34944 conditions, 4586 events. 2936/4586 cut-off events. For 335314/335314 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 25478 event pairs, 744 based on Foata normal form. 20/4599 useless extension candidates. Maximal degree in co-relation 34836. Up to 4080 conditions per place. [2024-06-27 23:52:23,581 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 312 selfloop transitions, 60 changer transitions 0/378 dead transitions. [2024-06-27 23:52:23,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 378 transitions, 5235 flow [2024-06-27 23:52:23,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:52:23,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:52:23,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 23:52:23,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 23:52:23,583 INFO L175 Difference]: Start difference. First operand has 218 places, 348 transitions, 4359 flow. Second operand 10 states and 175 transitions. [2024-06-27 23:52:23,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 378 transitions, 5235 flow [2024-06-27 23:52:24,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 378 transitions, 5119 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 23:52:24,236 INFO L231 Difference]: Finished difference. Result has 223 places, 348 transitions, 4376 flow [2024-06-27 23:52:24,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4243, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4376, PETRI_PLACES=223, PETRI_TRANSITIONS=348} [2024-06-27 23:52:24,236 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-27 23:52:24,237 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 348 transitions, 4376 flow [2024-06-27 23:52:24,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:24,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:24,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:24,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 23:52:24,242 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:24,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:24,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1189097102, now seen corresponding path program 3 times [2024-06-27 23:52:24,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:24,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794088641] [2024-06-27 23:52:24,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:24,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:25,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:25,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794088641] [2024-06-27 23:52:25,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794088641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:25,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:25,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:52:25,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072512219] [2024-06-27 23:52:25,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:25,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:52:25,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:25,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:52:25,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:52:25,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:52:25,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 348 transitions, 4376 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:25,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:25,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:52:25,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:27,173 INFO L124 PetriNetUnfolderBase]: 2994/4678 cut-off events. [2024-06-27 23:52:27,173 INFO L125 PetriNetUnfolderBase]: For 340939/340939 co-relation queries the response was YES. [2024-06-27 23:52:27,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35539 conditions, 4678 events. 2994/4678 cut-off events. For 340939/340939 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 26090 event pairs, 709 based on Foata normal form. 16/4687 useless extension candidates. Maximal degree in co-relation 35429. Up to 3773 conditions per place. [2024-06-27 23:52:27,224 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 305 selfloop transitions, 81 changer transitions 0/392 dead transitions. [2024-06-27 23:52:27,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 392 transitions, 5413 flow [2024-06-27 23:52:27,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:52:27,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:52:27,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-27 23:52:27,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264069264069264 [2024-06-27 23:52:27,226 INFO L175 Difference]: Start difference. First operand has 223 places, 348 transitions, 4376 flow. Second operand 11 states and 197 transitions. [2024-06-27 23:52:27,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 392 transitions, 5413 flow [2024-06-27 23:52:27,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 392 transitions, 5275 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 23:52:27,728 INFO L231 Difference]: Finished difference. Result has 225 places, 349 transitions, 4458 flow [2024-06-27 23:52:27,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4238, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4458, PETRI_PLACES=225, PETRI_TRANSITIONS=349} [2024-06-27 23:52:27,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-27 23:52:27,729 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 349 transitions, 4458 flow [2024-06-27 23:52:27,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:27,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:27,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:27,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 23:52:27,730 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:27,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:27,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1304486014, now seen corresponding path program 4 times [2024-06-27 23:52:27,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:27,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999370835] [2024-06-27 23:52:27,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:27,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:29,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:29,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999370835] [2024-06-27 23:52:29,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999370835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:29,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:29,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:52:29,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879013075] [2024-06-27 23:52:29,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:29,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:52:29,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:29,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:52:29,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:52:29,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:52:29,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 349 transitions, 4458 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:29,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:29,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:52:29,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:30,713 INFO L124 PetriNetUnfolderBase]: 3069/4823 cut-off events. [2024-06-27 23:52:30,713 INFO L125 PetriNetUnfolderBase]: For 367439/367439 co-relation queries the response was YES. [2024-06-27 23:52:30,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36843 conditions, 4823 events. 3069/4823 cut-off events. For 367439/367439 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27170 event pairs, 742 based on Foata normal form. 20/4841 useless extension candidates. Maximal degree in co-relation 36732. Up to 3784 conditions per place. [2024-06-27 23:52:30,760 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 218 selfloop transitions, 163 changer transitions 0/387 dead transitions. [2024-06-27 23:52:30,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 387 transitions, 5480 flow [2024-06-27 23:52:30,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:52:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:52:30,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-27 23:52:30,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-27 23:52:30,762 INFO L175 Difference]: Start difference. First operand has 225 places, 349 transitions, 4458 flow. Second operand 10 states and 184 transitions. [2024-06-27 23:52:30,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 387 transitions, 5480 flow [2024-06-27 23:52:31,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 387 transitions, 5288 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-27 23:52:31,415 INFO L231 Difference]: Finished difference. Result has 226 places, 350 transitions, 4653 flow [2024-06-27 23:52:31,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4266, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4653, PETRI_PLACES=226, PETRI_TRANSITIONS=350} [2024-06-27 23:52:31,415 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-27 23:52:31,416 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 350 transitions, 4653 flow [2024-06-27 23:52:31,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:31,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:31,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:31,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 23:52:31,416 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:31,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:31,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1299123634, now seen corresponding path program 5 times [2024-06-27 23:52:31,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:31,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154670521] [2024-06-27 23:52:31,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:31,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:32,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:32,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154670521] [2024-06-27 23:52:32,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154670521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:32,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:32,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:52:32,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61106765] [2024-06-27 23:52:32,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:32,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:52:32,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:32,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:52:32,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:52:33,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:52:33,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 350 transitions, 4653 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:33,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:33,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:52:33,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:34,458 INFO L124 PetriNetUnfolderBase]: 3144/4953 cut-off events. [2024-06-27 23:52:34,458 INFO L125 PetriNetUnfolderBase]: For 384441/384441 co-relation queries the response was YES. [2024-06-27 23:52:34,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38134 conditions, 4953 events. 3144/4953 cut-off events. For 384441/384441 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 28191 event pairs, 766 based on Foata normal form. 20/4971 useless extension candidates. Maximal degree in co-relation 38022. Up to 3909 conditions per place. [2024-06-27 23:52:34,500 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 224 selfloop transitions, 159 changer transitions 0/389 dead transitions. [2024-06-27 23:52:34,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 389 transitions, 5683 flow [2024-06-27 23:52:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:52:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:52:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 23:52:34,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-27 23:52:34,502 INFO L175 Difference]: Start difference. First operand has 226 places, 350 transitions, 4653 flow. Second operand 10 states and 186 transitions. [2024-06-27 23:52:34,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 389 transitions, 5683 flow [2024-06-27 23:52:35,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 389 transitions, 5306 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-27 23:52:35,111 INFO L231 Difference]: Finished difference. Result has 227 places, 351 transitions, 4657 flow [2024-06-27 23:52:35,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4276, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4657, PETRI_PLACES=227, PETRI_TRANSITIONS=351} [2024-06-27 23:52:35,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-27 23:52:35,112 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 351 transitions, 4657 flow [2024-06-27 23:52:35,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:35,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:35,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:35,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 23:52:35,113 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:35,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:35,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1298975764, now seen corresponding path program 6 times [2024-06-27 23:52:35,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:35,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706551513] [2024-06-27 23:52:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:35,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:36,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:36,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:36,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706551513] [2024-06-27 23:52:36,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706551513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:36,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:36,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:52:36,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253644780] [2024-06-27 23:52:36,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:36,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:52:36,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:36,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:52:36,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:52:36,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:52:36,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 351 transitions, 4657 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:36,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:36,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:52:36,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:38,169 INFO L124 PetriNetUnfolderBase]: 3202/5051 cut-off events. [2024-06-27 23:52:38,169 INFO L125 PetriNetUnfolderBase]: For 392211/392211 co-relation queries the response was YES. [2024-06-27 23:52:38,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38789 conditions, 5051 events. 3202/5051 cut-off events. For 392211/392211 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 28862 event pairs, 714 based on Foata normal form. 16/5065 useless extension candidates. Maximal degree in co-relation 38677. Up to 3740 conditions per place. [2024-06-27 23:52:38,218 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 225 selfloop transitions, 162 changer transitions 0/393 dead transitions. [2024-06-27 23:52:38,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 393 transitions, 5712 flow [2024-06-27 23:52:38,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:52:38,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:52:38,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 23:52:38,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-27 23:52:38,220 INFO L175 Difference]: Start difference. First operand has 227 places, 351 transitions, 4657 flow. Second operand 10 states and 188 transitions. [2024-06-27 23:52:38,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 393 transitions, 5712 flow [2024-06-27 23:52:38,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 393 transitions, 5317 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-27 23:52:38,710 INFO L231 Difference]: Finished difference. Result has 228 places, 352 transitions, 4647 flow [2024-06-27 23:52:38,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4262, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4647, PETRI_PLACES=228, PETRI_TRANSITIONS=352} [2024-06-27 23:52:38,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-27 23:52:38,711 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 352 transitions, 4647 flow [2024-06-27 23:52:38,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:38,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:38,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:38,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 23:52:38,711 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:38,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:38,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1304701216, now seen corresponding path program 1 times [2024-06-27 23:52:38,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:38,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492067047] [2024-06-27 23:52:38,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:38,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:40,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:40,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492067047] [2024-06-27 23:52:40,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492067047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:40,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:40,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:52:40,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030152896] [2024-06-27 23:52:40,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:40,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:52:40,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:40,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:52:40,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:52:40,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:52:40,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 352 transitions, 4647 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:40,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:40,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:52:40,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:41,833 INFO L124 PetriNetUnfolderBase]: 3330/5258 cut-off events. [2024-06-27 23:52:41,833 INFO L125 PetriNetUnfolderBase]: For 406374/406374 co-relation queries the response was YES. [2024-06-27 23:52:41,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40251 conditions, 5258 events. 3330/5258 cut-off events. For 406374/406374 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 30386 event pairs, 711 based on Foata normal form. 12/5268 useless extension candidates. Maximal degree in co-relation 40139. Up to 3704 conditions per place. [2024-06-27 23:52:41,888 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 218 selfloop transitions, 174 changer transitions 0/398 dead transitions. [2024-06-27 23:52:41,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 398 transitions, 5807 flow [2024-06-27 23:52:41,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:52:41,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:52:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-27 23:52:41,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-27 23:52:41,889 INFO L175 Difference]: Start difference. First operand has 228 places, 352 transitions, 4647 flow. Second operand 11 states and 201 transitions. [2024-06-27 23:52:41,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 398 transitions, 5807 flow [2024-06-27 23:52:42,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 398 transitions, 5398 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-27 23:52:42,526 INFO L231 Difference]: Finished difference. Result has 233 places, 358 transitions, 4831 flow [2024-06-27 23:52:42,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4284, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4831, PETRI_PLACES=233, PETRI_TRANSITIONS=358} [2024-06-27 23:52:42,526 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-27 23:52:42,526 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 358 transitions, 4831 flow [2024-06-27 23:52:42,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:42,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:42,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:42,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 23:52:42,527 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:42,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:42,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1684501937, now seen corresponding path program 1 times [2024-06-27 23:52:42,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:42,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320391973] [2024-06-27 23:52:42,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:42,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:43,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:43,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320391973] [2024-06-27 23:52:43,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320391973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:43,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:43,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:52:43,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261858797] [2024-06-27 23:52:43,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:43,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:52:43,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:43,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:52:43,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:52:43,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:52:43,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 358 transitions, 4831 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:43,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:43,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:52:43,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:44,506 INFO L124 PetriNetUnfolderBase]: 3222/5088 cut-off events. [2024-06-27 23:52:44,506 INFO L125 PetriNetUnfolderBase]: For 397799/397830 co-relation queries the response was YES. [2024-06-27 23:52:44,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39320 conditions, 5088 events. 3222/5088 cut-off events. For 397799/397830 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 29412 event pairs, 906 based on Foata normal form. 3/5040 useless extension candidates. Maximal degree in co-relation 39205. Up to 4780 conditions per place. [2024-06-27 23:52:44,561 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 302 selfloop transitions, 42 changer transitions 0/373 dead transitions. [2024-06-27 23:52:44,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 373 transitions, 5605 flow [2024-06-27 23:52:44,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:52:44,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:52:44,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 23:52:44,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-27 23:52:44,562 INFO L175 Difference]: Start difference. First operand has 233 places, 358 transitions, 4831 flow. Second operand 7 states and 120 transitions. [2024-06-27 23:52:44,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 373 transitions, 5605 flow [2024-06-27 23:52:45,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 373 transitions, 5286 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 23:52:45,204 INFO L231 Difference]: Finished difference. Result has 234 places, 361 transitions, 4647 flow [2024-06-27 23:52:45,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4512, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4647, PETRI_PLACES=234, PETRI_TRANSITIONS=361} [2024-06-27 23:52:45,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-27 23:52:45,205 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 361 transitions, 4647 flow [2024-06-27 23:52:45,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:45,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:45,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:45,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 23:52:45,206 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:45,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:45,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2098032810, now seen corresponding path program 7 times [2024-06-27 23:52:45,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:45,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318791858] [2024-06-27 23:52:45,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:45,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:46,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:46,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318791858] [2024-06-27 23:52:46,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318791858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:46,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:46,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:52:46,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693320889] [2024-06-27 23:52:46,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:46,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:52:46,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:46,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:52:46,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:52:46,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:52:46,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 361 transitions, 4647 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:46,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:46,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:52:46,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:48,397 INFO L124 PetriNetUnfolderBase]: 3427/5412 cut-off events. [2024-06-27 23:52:48,397 INFO L125 PetriNetUnfolderBase]: For 436913/436913 co-relation queries the response was YES. [2024-06-27 23:52:48,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41166 conditions, 5412 events. 3427/5412 cut-off events. For 436913/436913 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 31486 event pairs, 732 based on Foata normal form. 20/5431 useless extension candidates. Maximal degree in co-relation 41050. Up to 4375 conditions per place. [2024-06-27 23:52:48,446 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 228 selfloop transitions, 162 changer transitions 0/397 dead transitions. [2024-06-27 23:52:48,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 397 transitions, 5679 flow [2024-06-27 23:52:48,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:52:48,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:52:48,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 23:52:48,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-27 23:52:48,448 INFO L175 Difference]: Start difference. First operand has 234 places, 361 transitions, 4647 flow. Second operand 10 states and 181 transitions. [2024-06-27 23:52:48,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 397 transitions, 5679 flow [2024-06-27 23:52:49,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 397 transitions, 5585 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 23:52:49,301 INFO L231 Difference]: Finished difference. Result has 240 places, 362 transitions, 4944 flow [2024-06-27 23:52:49,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4553, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4944, PETRI_PLACES=240, PETRI_TRANSITIONS=362} [2024-06-27 23:52:49,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-27 23:52:49,302 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 362 transitions, 4944 flow [2024-06-27 23:52:49,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:49,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:49,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:49,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 23:52:49,302 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:49,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:49,303 INFO L85 PathProgramCache]: Analyzing trace with hash -2098180680, now seen corresponding path program 8 times [2024-06-27 23:52:49,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:49,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343168936] [2024-06-27 23:52:49,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:49,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:50,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:50,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343168936] [2024-06-27 23:52:50,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343168936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:50,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:50,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:52:50,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636154551] [2024-06-27 23:52:50,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:50,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:52:50,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:50,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:52:50,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:52:50,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:52:50,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 362 transitions, 4944 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:50,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:50,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:52:50,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:52,474 INFO L124 PetriNetUnfolderBase]: 3596/5701 cut-off events. [2024-06-27 23:52:52,474 INFO L125 PetriNetUnfolderBase]: For 490849/490849 co-relation queries the response was YES. [2024-06-27 23:52:52,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45277 conditions, 5701 events. 3596/5701 cut-off events. For 490849/490849 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 33756 event pairs, 765 based on Foata normal form. 16/5716 useless extension candidates. Maximal degree in co-relation 45160. Up to 4342 conditions per place. [2024-06-27 23:52:52,538 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 233 selfloop transitions, 164 changer transitions 0/404 dead transitions. [2024-06-27 23:52:52,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 404 transitions, 6283 flow [2024-06-27 23:52:52,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:52:52,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:52:52,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 23:52:52,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 23:52:52,540 INFO L175 Difference]: Start difference. First operand has 240 places, 362 transitions, 4944 flow. Second operand 10 states and 185 transitions. [2024-06-27 23:52:52,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 404 transitions, 6283 flow [2024-06-27 23:52:53,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 404 transitions, 5898 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-27 23:52:53,438 INFO L231 Difference]: Finished difference. Result has 241 places, 364 transitions, 5011 flow [2024-06-27 23:52:53,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4559, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5011, PETRI_PLACES=241, PETRI_TRANSITIONS=364} [2024-06-27 23:52:53,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-27 23:52:53,439 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 364 transitions, 5011 flow [2024-06-27 23:52:53,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:53,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:53,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:53,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 23:52:53,439 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:53,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:53,440 INFO L85 PathProgramCache]: Analyzing trace with hash -833522968, now seen corresponding path program 9 times [2024-06-27 23:52:53,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:53,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421892713] [2024-06-27 23:52:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:53,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:54,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:54,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421892713] [2024-06-27 23:52:54,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421892713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:54,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:55,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:52:55,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419523635] [2024-06-27 23:52:55,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:55,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:52:55,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:55,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:52:55,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:52:55,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:52:55,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 364 transitions, 5011 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:55,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:55,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:52:55,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:52:56,571 INFO L124 PetriNetUnfolderBase]: 3671/5818 cut-off events. [2024-06-27 23:52:56,579 INFO L125 PetriNetUnfolderBase]: For 514565/514565 co-relation queries the response was YES. [2024-06-27 23:52:56,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46252 conditions, 5818 events. 3671/5818 cut-off events. For 514565/514565 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34723 event pairs, 795 based on Foata normal form. 20/5837 useless extension candidates. Maximal degree in co-relation 46135. Up to 4779 conditions per place. [2024-06-27 23:52:56,649 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 216 selfloop transitions, 176 changer transitions 0/399 dead transitions. [2024-06-27 23:52:56,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 399 transitions, 6050 flow [2024-06-27 23:52:56,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:52:56,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:52:56,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-27 23:52:56,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-27 23:52:56,652 INFO L175 Difference]: Start difference. First operand has 241 places, 364 transitions, 5011 flow. Second operand 10 states and 179 transitions. [2024-06-27 23:52:56,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 399 transitions, 6050 flow [2024-06-27 23:52:57,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 399 transitions, 5805 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 23:52:57,601 INFO L231 Difference]: Finished difference. Result has 245 places, 365 transitions, 5189 flow [2024-06-27 23:52:57,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4774, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5189, PETRI_PLACES=245, PETRI_TRANSITIONS=365} [2024-06-27 23:52:57,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-27 23:52:57,602 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 365 transitions, 5189 flow [2024-06-27 23:52:57,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:57,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:52:57,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:52:57,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 23:52:57,603 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:52:57,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:52:57,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1027462378, now seen corresponding path program 10 times [2024-06-27 23:52:57,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:52:57,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032927076] [2024-06-27 23:52:57,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:52:57,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:52:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:52:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:52:59,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:52:59,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032927076] [2024-06-27 23:52:59,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032927076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:52:59,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:52:59,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:52:59,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496262240] [2024-06-27 23:52:59,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:52:59,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:52:59,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:52:59,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:52:59,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:52:59,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:52:59,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 365 transitions, 5189 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:52:59,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:52:59,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:52:59,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:00,834 INFO L124 PetriNetUnfolderBase]: 3635/5770 cut-off events. [2024-06-27 23:53:00,835 INFO L125 PetriNetUnfolderBase]: For 489040/489040 co-relation queries the response was YES. [2024-06-27 23:53:00,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45079 conditions, 5770 events. 3635/5770 cut-off events. For 489040/489040 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 34447 event pairs, 777 based on Foata normal form. 20/5789 useless extension candidates. Maximal degree in co-relation 44960. Up to 4723 conditions per place. [2024-06-27 23:53:00,893 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 235 selfloop transitions, 160 changer transitions 0/402 dead transitions. [2024-06-27 23:53:00,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 402 transitions, 6204 flow [2024-06-27 23:53:00,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:53:00,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:53:00,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-27 23:53:00,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 23:53:00,895 INFO L175 Difference]: Start difference. First operand has 245 places, 365 transitions, 5189 flow. Second operand 10 states and 182 transitions. [2024-06-27 23:53:00,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 402 transitions, 6204 flow [2024-06-27 23:53:01,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 402 transitions, 5761 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-27 23:53:01,771 INFO L231 Difference]: Finished difference. Result has 246 places, 365 transitions, 5075 flow [2024-06-27 23:53:01,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4746, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5075, PETRI_PLACES=246, PETRI_TRANSITIONS=365} [2024-06-27 23:53:01,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-27 23:53:01,772 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 365 transitions, 5075 flow [2024-06-27 23:53:01,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:01,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:01,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:01,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 23:53:01,773 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:01,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:01,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1999221688, now seen corresponding path program 2 times [2024-06-27 23:53:01,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:01,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788098601] [2024-06-27 23:53:01,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:01,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:03,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:03,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788098601] [2024-06-27 23:53:03,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788098601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:03,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:03,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:53:03,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000230852] [2024-06-27 23:53:03,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:03,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:53:03,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:03,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:53:03,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:53:03,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:53:03,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 365 transitions, 5075 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:03,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:03,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:53:03,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:05,338 INFO L124 PetriNetUnfolderBase]: 3676/5843 cut-off events. [2024-06-27 23:53:05,339 INFO L125 PetriNetUnfolderBase]: For 484336/484336 co-relation queries the response was YES. [2024-06-27 23:53:05,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45237 conditions, 5843 events. 3676/5843 cut-off events. For 484336/484336 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 35037 event pairs, 777 based on Foata normal form. 12/5854 useless extension candidates. Maximal degree in co-relation 45118. Up to 4704 conditions per place. [2024-06-27 23:53:05,407 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 219 selfloop transitions, 177 changer transitions 0/403 dead transitions. [2024-06-27 23:53:05,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 403 transitions, 6160 flow [2024-06-27 23:53:05,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:53:05,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:53:05,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 23:53:05,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-27 23:53:05,409 INFO L175 Difference]: Start difference. First operand has 246 places, 365 transitions, 5075 flow. Second operand 10 states and 181 transitions. [2024-06-27 23:53:05,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 403 transitions, 6160 flow [2024-06-27 23:53:06,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 403 transitions, 5698 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-27 23:53:06,368 INFO L231 Difference]: Finished difference. Result has 245 places, 366 transitions, 5035 flow [2024-06-27 23:53:06,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4613, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5035, PETRI_PLACES=245, PETRI_TRANSITIONS=366} [2024-06-27 23:53:06,369 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-27 23:53:06,369 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 366 transitions, 5035 flow [2024-06-27 23:53:06,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:06,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:06,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:06,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 23:53:06,369 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:06,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:06,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1027247176, now seen corresponding path program 3 times [2024-06-27 23:53:06,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:06,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307942630] [2024-06-27 23:53:06,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:06,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:08,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:08,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307942630] [2024-06-27 23:53:08,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307942630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:08,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:08,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:53:08,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783301511] [2024-06-27 23:53:08,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:08,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:53:08,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:08,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:53:08,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:53:08,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:53:08,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 366 transitions, 5035 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:08,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:08,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:53:08,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:09,773 INFO L124 PetriNetUnfolderBase]: 3717/5927 cut-off events. [2024-06-27 23:53:09,773 INFO L125 PetriNetUnfolderBase]: For 502069/502069 co-relation queries the response was YES. [2024-06-27 23:53:09,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45990 conditions, 5927 events. 3717/5927 cut-off events. For 502069/502069 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35813 event pairs, 800 based on Foata normal form. 12/5938 useless extension candidates. Maximal degree in co-relation 45871. Up to 4646 conditions per place. [2024-06-27 23:53:09,829 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 237 selfloop transitions, 162 changer transitions 0/406 dead transitions. [2024-06-27 23:53:09,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 406 transitions, 6141 flow [2024-06-27 23:53:09,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:53:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:53:09,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 23:53:09,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-27 23:53:09,830 INFO L175 Difference]: Start difference. First operand has 245 places, 366 transitions, 5035 flow. Second operand 10 states and 183 transitions. [2024-06-27 23:53:09,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 406 transitions, 6141 flow [2024-06-27 23:53:10,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 406 transitions, 5741 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-27 23:53:10,704 INFO L231 Difference]: Finished difference. Result has 247 places, 367 transitions, 5029 flow [2024-06-27 23:53:10,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4635, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5029, PETRI_PLACES=247, PETRI_TRANSITIONS=367} [2024-06-27 23:53:10,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-27 23:53:10,704 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 367 transitions, 5029 flow [2024-06-27 23:53:10,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:10,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:10,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:10,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 23:53:10,705 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:10,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:10,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2008418458, now seen corresponding path program 4 times [2024-06-27 23:53:10,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:10,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385967069] [2024-06-27 23:53:10,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:10,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:12,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:12,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385967069] [2024-06-27 23:53:12,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385967069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:12,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:12,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:53:12,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549610229] [2024-06-27 23:53:12,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:12,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:53:12,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:12,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:53:12,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:53:12,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:53:12,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 367 transitions, 5029 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:12,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:12,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:53:12,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:13,950 INFO L124 PetriNetUnfolderBase]: 3844/6137 cut-off events. [2024-06-27 23:53:13,950 INFO L125 PetriNetUnfolderBase]: For 556371/556371 co-relation queries the response was YES. [2024-06-27 23:53:13,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48687 conditions, 6137 events. 3844/6137 cut-off events. For 556371/556371 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 37377 event pairs, 701 based on Foata normal form. 12/6148 useless extension candidates. Maximal degree in co-relation 48567. Up to 3744 conditions per place. [2024-06-27 23:53:14,019 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 208 selfloop transitions, 192 changer transitions 0/407 dead transitions. [2024-06-27 23:53:14,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 407 transitions, 6417 flow [2024-06-27 23:53:14,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:53:14,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:53:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-27 23:53:14,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 23:53:14,020 INFO L175 Difference]: Start difference. First operand has 247 places, 367 transitions, 5029 flow. Second operand 10 states and 182 transitions. [2024-06-27 23:53:14,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 407 transitions, 6417 flow [2024-06-27 23:53:15,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 407 transitions, 6045 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 23:53:15,229 INFO L231 Difference]: Finished difference. Result has 249 places, 369 transitions, 5177 flow [2024-06-27 23:53:15,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4657, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5177, PETRI_PLACES=249, PETRI_TRANSITIONS=369} [2024-06-27 23:53:15,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-27 23:53:15,230 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 369 transitions, 5177 flow [2024-06-27 23:53:15,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:15,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:15,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:15,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 23:53:15,231 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:15,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:15,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2038764977, now seen corresponding path program 2 times [2024-06-27 23:53:15,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:15,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572428086] [2024-06-27 23:53:15,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:15,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:16,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:16,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572428086] [2024-06-27 23:53:16,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572428086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:16,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:16,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:53:16,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712121864] [2024-06-27 23:53:16,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:16,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:53:16,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:16,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:53:16,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:53:16,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:53:16,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 369 transitions, 5177 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:16,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:16,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:53:16,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:17,421 INFO L124 PetriNetUnfolderBase]: 3705/5920 cut-off events. [2024-06-27 23:53:17,422 INFO L125 PetriNetUnfolderBase]: For 552802/552833 co-relation queries the response was YES. [2024-06-27 23:53:17,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47979 conditions, 5920 events. 3705/5920 cut-off events. For 552802/552833 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 36233 event pairs, 1060 based on Foata normal form. 6/5859 useless extension candidates. Maximal degree in co-relation 47858. Up to 5554 conditions per place. [2024-06-27 23:53:17,488 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 302 selfloop transitions, 58 changer transitions 0/389 dead transitions. [2024-06-27 23:53:17,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 389 transitions, 6327 flow [2024-06-27 23:53:17,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:53:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:53:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 23:53:17,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-27 23:53:17,489 INFO L175 Difference]: Start difference. First operand has 249 places, 369 transitions, 5177 flow. Second operand 7 states and 121 transitions. [2024-06-27 23:53:17,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 389 transitions, 6327 flow [2024-06-27 23:53:18,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 389 transitions, 6061 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 23:53:18,431 INFO L231 Difference]: Finished difference. Result has 250 places, 378 transitions, 5171 flow [2024-06-27 23:53:18,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4911, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5171, PETRI_PLACES=250, PETRI_TRANSITIONS=378} [2024-06-27 23:53:18,432 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-27 23:53:18,432 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 378 transitions, 5171 flow [2024-06-27 23:53:18,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:18,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:18,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:18,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 23:53:18,433 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:18,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:18,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2039180687, now seen corresponding path program 3 times [2024-06-27 23:53:18,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:18,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122163033] [2024-06-27 23:53:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:18,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:19,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:19,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122163033] [2024-06-27 23:53:19,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122163033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:19,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:19,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:53:19,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022898550] [2024-06-27 23:53:19,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:19,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:53:19,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:19,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:53:19,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:53:19,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:53:19,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 378 transitions, 5171 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:19,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:19,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:53:19,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:20,589 INFO L124 PetriNetUnfolderBase]: 3699/5912 cut-off events. [2024-06-27 23:53:20,589 INFO L125 PetriNetUnfolderBase]: For 557138/557171 co-relation queries the response was YES. [2024-06-27 23:53:20,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48081 conditions, 5912 events. 3699/5912 cut-off events. For 557138/557171 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 36154 event pairs, 1059 based on Foata normal form. 11/5856 useless extension candidates. Maximal degree in co-relation 47958. Up to 5549 conditions per place. [2024-06-27 23:53:20,658 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 298 selfloop transitions, 61 changer transitions 0/388 dead transitions. [2024-06-27 23:53:20,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 388 transitions, 6059 flow [2024-06-27 23:53:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:53:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:53:20,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 23:53:20,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 23:53:20,659 INFO L175 Difference]: Start difference. First operand has 250 places, 378 transitions, 5171 flow. Second operand 7 states and 119 transitions. [2024-06-27 23:53:20,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 388 transitions, 6059 flow [2024-06-27 23:53:21,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 388 transitions, 5947 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-27 23:53:21,443 INFO L231 Difference]: Finished difference. Result has 255 places, 378 transitions, 5187 flow [2024-06-27 23:53:21,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5059, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5187, PETRI_PLACES=255, PETRI_TRANSITIONS=378} [2024-06-27 23:53:21,444 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-27 23:53:21,444 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 378 transitions, 5187 flow [2024-06-27 23:53:21,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:21,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:21,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:21,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 23:53:21,445 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:21,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:21,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1947244426, now seen corresponding path program 11 times [2024-06-27 23:53:21,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:21,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783451848] [2024-06-27 23:53:21,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:21,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:22,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:22,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783451848] [2024-06-27 23:53:22,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783451848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:22,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:22,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:53:22,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023603549] [2024-06-27 23:53:22,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:22,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:53:22,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:22,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:53:22,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:53:22,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:53:22,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 378 transitions, 5187 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:22,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:22,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:53:22,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:24,199 INFO L124 PetriNetUnfolderBase]: 4242/6793 cut-off events. [2024-06-27 23:53:24,199 INFO L125 PetriNetUnfolderBase]: For 691715/691729 co-relation queries the response was YES. [2024-06-27 23:53:24,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56408 conditions, 6793 events. 4242/6793 cut-off events. For 691715/691729 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 42619 event pairs, 1144 based on Foata normal form. 18/6804 useless extension candidates. Maximal degree in co-relation 56283. Up to 5494 conditions per place. [2024-06-27 23:53:24,280 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 324 selfloop transitions, 106 changer transitions 0/440 dead transitions. [2024-06-27 23:53:24,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 440 transitions, 6819 flow [2024-06-27 23:53:24,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:53:24,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:53:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 224 transitions. [2024-06-27 23:53:24,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 23:53:24,282 INFO L175 Difference]: Start difference. First operand has 255 places, 378 transitions, 5187 flow. Second operand 12 states and 224 transitions. [2024-06-27 23:53:24,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 440 transitions, 6819 flow [2024-06-27 23:53:25,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 440 transitions, 6702 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 23:53:25,409 INFO L231 Difference]: Finished difference. Result has 263 places, 384 transitions, 5579 flow [2024-06-27 23:53:25,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5070, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5579, PETRI_PLACES=263, PETRI_TRANSITIONS=384} [2024-06-27 23:53:25,409 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-27 23:53:25,409 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 384 transitions, 5579 flow [2024-06-27 23:53:25,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:25,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:25,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:25,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 23:53:25,410 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:25,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:25,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1241107154, now seen corresponding path program 12 times [2024-06-27 23:53:25,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:25,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243860404] [2024-06-27 23:53:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:25,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:26,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:26,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243860404] [2024-06-27 23:53:26,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243860404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:26,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:26,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:53:26,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60725727] [2024-06-27 23:53:26,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:26,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:53:26,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:26,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:53:26,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:53:26,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:53:26,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 384 transitions, 5579 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:26,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:26,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:53:26,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:28,459 INFO L124 PetriNetUnfolderBase]: 4327/6954 cut-off events. [2024-06-27 23:53:28,459 INFO L125 PetriNetUnfolderBase]: For 719273/719287 co-relation queries the response was YES. [2024-06-27 23:53:28,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58122 conditions, 6954 events. 4327/6954 cut-off events. For 719273/719287 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 44196 event pairs, 1378 based on Foata normal form. 22/6969 useless extension candidates. Maximal degree in co-relation 57995. Up to 6236 conditions per place. [2024-06-27 23:53:28,549 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 336 selfloop transitions, 87 changer transitions 0/433 dead transitions. [2024-06-27 23:53:28,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 433 transitions, 6758 flow [2024-06-27 23:53:28,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:53:28,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:53:28,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 216 transitions. [2024-06-27 23:53:28,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:53:28,550 INFO L175 Difference]: Start difference. First operand has 263 places, 384 transitions, 5579 flow. Second operand 12 states and 216 transitions. [2024-06-27 23:53:28,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 433 transitions, 6758 flow [2024-06-27 23:53:30,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 433 transitions, 6579 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-27 23:53:30,106 INFO L231 Difference]: Finished difference. Result has 267 places, 386 transitions, 5681 flow [2024-06-27 23:53:30,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5404, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5681, PETRI_PLACES=267, PETRI_TRANSITIONS=386} [2024-06-27 23:53:30,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-27 23:53:30,108 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 386 transitions, 5681 flow [2024-06-27 23:53:30,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:30,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:30,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:30,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 23:53:30,109 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:30,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:30,109 INFO L85 PathProgramCache]: Analyzing trace with hash -677187106, now seen corresponding path program 13 times [2024-06-27 23:53:30,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:30,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521587903] [2024-06-27 23:53:30,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:30,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:31,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:31,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521587903] [2024-06-27 23:53:31,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521587903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:31,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:31,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:53:31,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762861075] [2024-06-27 23:53:31,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:31,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:53:31,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:31,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:53:31,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:53:31,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:53:31,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 386 transitions, 5681 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:31,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:31,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:53:31,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:33,426 INFO L124 PetriNetUnfolderBase]: 4355/6992 cut-off events. [2024-06-27 23:53:33,426 INFO L125 PetriNetUnfolderBase]: For 713610/713624 co-relation queries the response was YES. [2024-06-27 23:53:33,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58293 conditions, 6992 events. 4355/6992 cut-off events. For 713610/713624 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 44360 event pairs, 1308 based on Foata normal form. 18/7003 useless extension candidates. Maximal degree in co-relation 58164. Up to 6092 conditions per place. [2024-06-27 23:53:33,502 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 336 selfloop transitions, 92 changer transitions 0/438 dead transitions. [2024-06-27 23:53:33,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 438 transitions, 6858 flow [2024-06-27 23:53:33,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:53:33,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:53:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 220 transitions. [2024-06-27 23:53:33,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 23:53:33,503 INFO L175 Difference]: Start difference. First operand has 267 places, 386 transitions, 5681 flow. Second operand 12 states and 220 transitions. [2024-06-27 23:53:33,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 438 transitions, 6858 flow [2024-06-27 23:53:35,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 438 transitions, 6666 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-27 23:53:35,348 INFO L231 Difference]: Finished difference. Result has 270 places, 387 transitions, 5747 flow [2024-06-27 23:53:35,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5489, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5747, PETRI_PLACES=270, PETRI_TRANSITIONS=387} [2024-06-27 23:53:35,349 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-27 23:53:35,349 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 387 transitions, 5747 flow [2024-06-27 23:53:35,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:35,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:35,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:35,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 23:53:35,350 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:35,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:35,350 INFO L85 PathProgramCache]: Analyzing trace with hash 18754044, now seen corresponding path program 14 times [2024-06-27 23:53:35,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:35,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897682012] [2024-06-27 23:53:35,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:35,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:36,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:36,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897682012] [2024-06-27 23:53:36,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897682012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:36,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:36,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:53:36,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16659003] [2024-06-27 23:53:36,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:36,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:53:36,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:36,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:53:36,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:53:36,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 23:53:36,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 387 transitions, 5747 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:36,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:36,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 23:53:36,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:38,079 INFO L124 PetriNetUnfolderBase]: 3890/6791 cut-off events. [2024-06-27 23:53:38,080 INFO L125 PetriNetUnfolderBase]: For 862350/862682 co-relation queries the response was YES. [2024-06-27 23:53:38,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61312 conditions, 6791 events. 3890/6791 cut-off events. For 862350/862682 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 48637 event pairs, 767 based on Foata normal form. 73/6689 useless extension candidates. Maximal degree in co-relation 61182. Up to 3878 conditions per place. [2024-06-27 23:53:38,162 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 222 selfloop transitions, 128 changer transitions 0/445 dead transitions. [2024-06-27 23:53:38,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 445 transitions, 7457 flow [2024-06-27 23:53:38,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:53:38,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:53:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-27 23:53:38,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49134199134199136 [2024-06-27 23:53:38,164 INFO L175 Difference]: Start difference. First operand has 270 places, 387 transitions, 5747 flow. Second operand 11 states and 227 transitions. [2024-06-27 23:53:38,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 445 transitions, 7457 flow [2024-06-27 23:53:40,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 445 transitions, 7228 flow, removed 25 selfloop flow, removed 10 redundant places. [2024-06-27 23:53:40,029 INFO L231 Difference]: Finished difference. Result has 272 places, 397 transitions, 6256 flow [2024-06-27 23:53:40,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5518, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6256, PETRI_PLACES=272, PETRI_TRANSITIONS=397} [2024-06-27 23:53:40,030 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-27 23:53:40,030 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 397 transitions, 6256 flow [2024-06-27 23:53:40,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:40,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:40,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:40,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 23:53:40,030 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:40,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:40,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1529750000, now seen corresponding path program 15 times [2024-06-27 23:53:40,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:40,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072460795] [2024-06-27 23:53:40,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:40,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:41,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:41,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072460795] [2024-06-27 23:53:41,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072460795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:41,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:41,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:53:41,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268787546] [2024-06-27 23:53:41,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:41,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:53:41,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:41,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:53:41,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:53:41,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:53:41,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 397 transitions, 6256 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:41,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:41,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:53:41,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:43,477 INFO L124 PetriNetUnfolderBase]: 5285/8520 cut-off events. [2024-06-27 23:53:43,477 INFO L125 PetriNetUnfolderBase]: For 964789/964791 co-relation queries the response was YES. [2024-06-27 23:53:43,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74786 conditions, 8520 events. 5285/8520 cut-off events. For 964789/964791 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 56313 event pairs, 1574 based on Foata normal form. 26/8545 useless extension candidates. Maximal degree in co-relation 74654. Up to 6752 conditions per place. [2024-06-27 23:53:43,595 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 352 selfloop transitions, 95 changer transitions 0/457 dead transitions. [2024-06-27 23:53:43,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 457 transitions, 8028 flow [2024-06-27 23:53:43,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:53:43,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:53:43,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-27 23:53:43,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4458874458874459 [2024-06-27 23:53:43,597 INFO L175 Difference]: Start difference. First operand has 272 places, 397 transitions, 6256 flow. Second operand 11 states and 206 transitions. [2024-06-27 23:53:43,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 457 transitions, 8028 flow [2024-06-27 23:53:45,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 457 transitions, 7764 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-27 23:53:45,783 INFO L231 Difference]: Finished difference. Result has 277 places, 406 transitions, 6613 flow [2024-06-27 23:53:45,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6068, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6613, PETRI_PLACES=277, PETRI_TRANSITIONS=406} [2024-06-27 23:53:45,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-27 23:53:45,793 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 406 transitions, 6613 flow [2024-06-27 23:53:45,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:45,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:45,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:45,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 23:53:45,794 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:45,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:45,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1531623950, now seen corresponding path program 16 times [2024-06-27 23:53:45,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:45,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130432116] [2024-06-27 23:53:45,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:45,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:47,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:47,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130432116] [2024-06-27 23:53:47,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130432116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:47,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:47,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:53:47,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107961734] [2024-06-27 23:53:47,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:47,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:53:47,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:47,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:53:47,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:53:47,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:53:47,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 406 transitions, 6613 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:47,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:47,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:53:47,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:49,387 INFO L124 PetriNetUnfolderBase]: 5221/8426 cut-off events. [2024-06-27 23:53:49,387 INFO L125 PetriNetUnfolderBase]: For 891288/891290 co-relation queries the response was YES. [2024-06-27 23:53:49,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71125 conditions, 8426 events. 5221/8426 cut-off events. For 891288/891290 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 55809 event pairs, 1593 based on Foata normal form. 34/8459 useless extension candidates. Maximal degree in co-relation 70991. Up to 7146 conditions per place. [2024-06-27 23:53:49,483 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 363 selfloop transitions, 77 changer transitions 0/450 dead transitions. [2024-06-27 23:53:49,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 450 transitions, 7967 flow [2024-06-27 23:53:49,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:53:49,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:53:49,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 23:53:49,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-27 23:53:49,485 INFO L175 Difference]: Start difference. First operand has 277 places, 406 transitions, 6613 flow. Second operand 10 states and 188 transitions. [2024-06-27 23:53:49,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 450 transitions, 7967 flow [2024-06-27 23:53:51,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 450 transitions, 7705 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-27 23:53:51,600 INFO L231 Difference]: Finished difference. Result has 279 places, 406 transitions, 6519 flow [2024-06-27 23:53:51,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6351, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6519, PETRI_PLACES=279, PETRI_TRANSITIONS=406} [2024-06-27 23:53:51,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-27 23:53:51,601 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 406 transitions, 6519 flow [2024-06-27 23:53:51,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:51,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:51,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:51,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 23:53:51,602 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:51,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:51,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1618463630, now seen corresponding path program 17 times [2024-06-27 23:53:51,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:51,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648396317] [2024-06-27 23:53:51,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:51,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:53,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:53,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648396317] [2024-06-27 23:53:53,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648396317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:53,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:53,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:53:53,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677536061] [2024-06-27 23:53:53,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:53,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:53:53,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:53,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:53:53,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:53:53,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:53:53,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 406 transitions, 6519 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:53,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:53,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:53:53,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:53:55,128 INFO L124 PetriNetUnfolderBase]: 5139/8310 cut-off events. [2024-06-27 23:53:55,128 INFO L125 PetriNetUnfolderBase]: For 822598/822600 co-relation queries the response was YES. [2024-06-27 23:53:55,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66403 conditions, 8310 events. 5139/8310 cut-off events. For 822598/822600 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 55153 event pairs, 1661 based on Foata normal form. 42/8351 useless extension candidates. Maximal degree in co-relation 66268. Up to 7471 conditions per place. [2024-06-27 23:53:55,246 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 366 selfloop transitions, 66 changer transitions 0/442 dead transitions. [2024-06-27 23:53:55,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 442 transitions, 7548 flow [2024-06-27 23:53:55,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:53:55,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:53:55,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-27 23:53:55,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 23:53:55,247 INFO L175 Difference]: Start difference. First operand has 279 places, 406 transitions, 6519 flow. Second operand 10 states and 182 transitions. [2024-06-27 23:53:55,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 442 transitions, 7548 flow [2024-06-27 23:53:57,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 442 transitions, 7127 flow, removed 133 selfloop flow, removed 8 redundant places. [2024-06-27 23:53:57,636 INFO L231 Difference]: Finished difference. Result has 281 places, 406 transitions, 6247 flow [2024-06-27 23:53:57,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6098, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6247, PETRI_PLACES=281, PETRI_TRANSITIONS=406} [2024-06-27 23:53:57,637 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-27 23:53:57,637 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 406 transitions, 6247 flow [2024-06-27 23:53:57,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:57,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:53:57,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:53:57,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 23:53:57,638 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:53:57,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:53:57,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1666021508, now seen corresponding path program 18 times [2024-06-27 23:53:57,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:53:57,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736797341] [2024-06-27 23:53:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:53:57,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:53:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:53:59,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:53:59,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:53:59,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736797341] [2024-06-27 23:53:59,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736797341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:53:59,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:53:59,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:53:59,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846656565] [2024-06-27 23:53:59,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:53:59,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:53:59,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:53:59,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:53:59,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:53:59,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:53:59,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 406 transitions, 6247 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:53:59,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:53:59,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:53:59,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:01,323 INFO L124 PetriNetUnfolderBase]: 5263/8508 cut-off events. [2024-06-27 23:54:01,323 INFO L125 PetriNetUnfolderBase]: For 751162/751162 co-relation queries the response was YES. [2024-06-27 23:54:01,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65823 conditions, 8508 events. 5263/8508 cut-off events. For 751162/751162 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 56615 event pairs, 1394 based on Foata normal form. 20/8526 useless extension candidates. Maximal degree in co-relation 65687. Up to 7342 conditions per place. [2024-06-27 23:54:01,421 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 265 selfloop transitions, 175 changer transitions 0/450 dead transitions. [2024-06-27 23:54:01,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 450 transitions, 7437 flow [2024-06-27 23:54:01,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:54:01,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:54:01,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 23:54:01,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-27 23:54:01,423 INFO L175 Difference]: Start difference. First operand has 281 places, 406 transitions, 6247 flow. Second operand 10 states and 193 transitions. [2024-06-27 23:54:01,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 450 transitions, 7437 flow [2024-06-27 23:54:02,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 450 transitions, 7258 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-27 23:54:02,970 INFO L231 Difference]: Finished difference. Result has 280 places, 408 transitions, 6516 flow [2024-06-27 23:54:02,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6068, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6516, PETRI_PLACES=280, PETRI_TRANSITIONS=408} [2024-06-27 23:54:02,971 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-27 23:54:02,971 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 408 transitions, 6516 flow [2024-06-27 23:54:02,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:02,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:02,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:02,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 23:54:02,971 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:02,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:02,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1660514978, now seen corresponding path program 19 times [2024-06-27 23:54:02,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:02,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552218985] [2024-06-27 23:54:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:02,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:04,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:04,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552218985] [2024-06-27 23:54:04,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552218985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:04,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:04,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:54:04,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201462990] [2024-06-27 23:54:04,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:04,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:54:04,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:04,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:54:04,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:54:04,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:54:04,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 408 transitions, 6516 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:04,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:04,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:54:04,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:06,513 INFO L124 PetriNetUnfolderBase]: 5337/8634 cut-off events. [2024-06-27 23:54:06,513 INFO L125 PetriNetUnfolderBase]: For 705043/705043 co-relation queries the response was YES. [2024-06-27 23:54:06,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66097 conditions, 8634 events. 5337/8634 cut-off events. For 705043/705043 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 57770 event pairs, 1368 based on Foata normal form. 20/8652 useless extension candidates. Maximal degree in co-relation 65962. Up to 7468 conditions per place. [2024-06-27 23:54:06,622 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 274 selfloop transitions, 169 changer transitions 0/453 dead transitions. [2024-06-27 23:54:06,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 453 transitions, 7716 flow [2024-06-27 23:54:06,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:54:06,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:54:06,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 23:54:06,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 23:54:06,624 INFO L175 Difference]: Start difference. First operand has 280 places, 408 transitions, 6516 flow. Second operand 10 states and 195 transitions. [2024-06-27 23:54:06,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 453 transitions, 7716 flow [2024-06-27 23:54:08,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 453 transitions, 7330 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 23:54:08,685 INFO L231 Difference]: Finished difference. Result has 282 places, 410 transitions, 6568 flow [2024-06-27 23:54:08,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6130, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6568, PETRI_PLACES=282, PETRI_TRANSITIONS=410} [2024-06-27 23:54:08,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-27 23:54:08,685 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 410 transitions, 6568 flow [2024-06-27 23:54:08,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:08,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:08,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:08,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 23:54:08,686 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:08,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:08,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1660511258, now seen corresponding path program 20 times [2024-06-27 23:54:08,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:08,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667647784] [2024-06-27 23:54:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:08,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:09,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:09,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667647784] [2024-06-27 23:54:09,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667647784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:09,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:09,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:54:09,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880974087] [2024-06-27 23:54:09,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:09,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:54:09,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:09,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:54:09,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:54:10,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:54:10,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 410 transitions, 6568 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:10,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:10,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:54:10,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:12,259 INFO L124 PetriNetUnfolderBase]: 5347/8652 cut-off events. [2024-06-27 23:54:12,259 INFO L125 PetriNetUnfolderBase]: For 673789/673789 co-relation queries the response was YES. [2024-06-27 23:54:12,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64841 conditions, 8652 events. 5347/8652 cut-off events. For 673789/673789 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 57879 event pairs, 1366 based on Foata normal form. 16/8666 useless extension candidates. Maximal degree in co-relation 64705. Up to 7126 conditions per place. [2024-06-27 23:54:12,345 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 272 selfloop transitions, 175 changer transitions 0/457 dead transitions. [2024-06-27 23:54:12,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 457 transitions, 7718 flow [2024-06-27 23:54:12,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:54:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:54:12,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 23:54:12,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2024-06-27 23:54:12,347 INFO L175 Difference]: Start difference. First operand has 282 places, 410 transitions, 6568 flow. Second operand 10 states and 197 transitions. [2024-06-27 23:54:12,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 457 transitions, 7718 flow [2024-06-27 23:54:14,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 457 transitions, 7342 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-27 23:54:14,361 INFO L231 Difference]: Finished difference. Result has 284 places, 411 transitions, 6566 flow [2024-06-27 23:54:14,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6192, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6566, PETRI_PLACES=284, PETRI_TRANSITIONS=411} [2024-06-27 23:54:14,362 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-27 23:54:14,362 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 411 transitions, 6566 flow [2024-06-27 23:54:14,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:14,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:14,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:14,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 23:54:14,363 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:14,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:14,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1666236710, now seen corresponding path program 5 times [2024-06-27 23:54:14,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:14,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700428724] [2024-06-27 23:54:14,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:14,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:16,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:16,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700428724] [2024-06-27 23:54:16,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700428724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:16,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:16,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:54:16,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438679704] [2024-06-27 23:54:16,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:16,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:54:16,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:16,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:54:16,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:54:16,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:54:16,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 411 transitions, 6566 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:16,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:16,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:54:16,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:18,151 INFO L124 PetriNetUnfolderBase]: 5354/8670 cut-off events. [2024-06-27 23:54:18,151 INFO L125 PetriNetUnfolderBase]: For 646730/646730 co-relation queries the response was YES. [2024-06-27 23:54:18,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63932 conditions, 8670 events. 5354/8670 cut-off events. For 646730/646730 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 58003 event pairs, 1332 based on Foata normal form. 12/8680 useless extension candidates. Maximal degree in co-relation 63795. Up to 6604 conditions per place. [2024-06-27 23:54:18,264 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 258 selfloop transitions, 188 changer transitions 0/456 dead transitions. [2024-06-27 23:54:18,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 456 transitions, 7613 flow [2024-06-27 23:54:18,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:54:18,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:54:18,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 23:54:18,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-27 23:54:18,275 INFO L175 Difference]: Start difference. First operand has 284 places, 411 transitions, 6566 flow. Second operand 10 states and 193 transitions. [2024-06-27 23:54:18,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 456 transitions, 7613 flow [2024-06-27 23:54:20,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 456 transitions, 7191 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-27 23:54:20,633 INFO L231 Difference]: Finished difference. Result has 285 places, 411 transitions, 6420 flow [2024-06-27 23:54:20,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6020, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6420, PETRI_PLACES=285, PETRI_TRANSITIONS=411} [2024-06-27 23:54:20,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-27 23:54:20,634 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 411 transitions, 6420 flow [2024-06-27 23:54:20,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:20,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:20,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:20,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 23:54:20,635 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:20,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:20,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1523680783, now seen corresponding path program 4 times [2024-06-27 23:54:20,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:20,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138065070] [2024-06-27 23:54:20,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:20,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:21,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:21,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138065070] [2024-06-27 23:54:21,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138065070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:21,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:21,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:54:21,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164962645] [2024-06-27 23:54:21,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:21,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:54:21,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:21,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:54:21,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:54:21,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:54:21,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 411 transitions, 6420 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:21,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:21,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:54:21,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:23,412 INFO L124 PetriNetUnfolderBase]: 5472/8805 cut-off events. [2024-06-27 23:54:23,412 INFO L125 PetriNetUnfolderBase]: For 627469/627469 co-relation queries the response was YES. [2024-06-27 23:54:23,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64377 conditions, 8805 events. 5472/8805 cut-off events. For 627469/627469 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 58649 event pairs, 1757 based on Foata normal form. 2/8806 useless extension candidates. Maximal degree in co-relation 64239. Up to 8480 conditions per place. [2024-06-27 23:54:23,513 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 391 selfloop transitions, 48 changer transitions 0/443 dead transitions. [2024-06-27 23:54:23,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 443 transitions, 7522 flow [2024-06-27 23:54:23,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:54:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:54:23,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 23:54:23,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-27 23:54:23,515 INFO L175 Difference]: Start difference. First operand has 285 places, 411 transitions, 6420 flow. Second operand 7 states and 124 transitions. [2024-06-27 23:54:23,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 443 transitions, 7522 flow [2024-06-27 23:54:24,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 443 transitions, 6944 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-27 23:54:24,799 INFO L231 Difference]: Finished difference. Result has 283 places, 425 transitions, 6133 flow [2024-06-27 23:54:24,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5842, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6133, PETRI_PLACES=283, PETRI_TRANSITIONS=425} [2024-06-27 23:54:24,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-27 23:54:24,800 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 425 transitions, 6133 flow [2024-06-27 23:54:24,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:24,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:24,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:24,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 23:54:24,801 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:24,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:24,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1861697813, now seen corresponding path program 1 times [2024-06-27 23:54:24,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:24,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541433854] [2024-06-27 23:54:24,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:24,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:25,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:25,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541433854] [2024-06-27 23:54:25,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541433854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:25,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:25,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:54:25,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653133077] [2024-06-27 23:54:25,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:25,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:54:25,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:25,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:54:25,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:54:25,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:54:25,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 425 transitions, 6133 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-27 23:54:25,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:25,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:54:25,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:27,596 INFO L124 PetriNetUnfolderBase]: 5177/8484 cut-off events. [2024-06-27 23:54:27,596 INFO L125 PetriNetUnfolderBase]: For 550106/550106 co-relation queries the response was YES. [2024-06-27 23:54:27,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58861 conditions, 8484 events. 5177/8484 cut-off events. For 550106/550106 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 57865 event pairs, 2362 based on Foata normal form. 1/8484 useless extension candidates. Maximal degree in co-relation 58723. Up to 8056 conditions per place. [2024-06-27 23:54:27,697 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 414 selfloop transitions, 19 changer transitions 0/446 dead transitions. [2024-06-27 23:54:27,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 446 transitions, 7144 flow [2024-06-27 23:54:27,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:54:27,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:54:27,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 23:54:27,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 23:54:27,699 INFO L175 Difference]: Start difference. First operand has 283 places, 425 transitions, 6133 flow. Second operand 8 states and 136 transitions. [2024-06-27 23:54:27,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 446 transitions, 7144 flow [2024-06-27 23:54:29,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 446 transitions, 7072 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-27 23:54:29,704 INFO L231 Difference]: Finished difference. Result has 289 places, 431 transitions, 6170 flow [2024-06-27 23:54:29,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6061, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6170, PETRI_PLACES=289, PETRI_TRANSITIONS=431} [2024-06-27 23:54:29,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-27 23:54:29,710 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 431 transitions, 6170 flow [2024-06-27 23:54:29,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-27 23:54:29,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:29,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:29,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 23:54:29,711 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:29,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:29,711 INFO L85 PathProgramCache]: Analyzing trace with hash 310608817, now seen corresponding path program 1 times [2024-06-27 23:54:29,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:29,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237609694] [2024-06-27 23:54:29,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:29,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:30,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:30,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237609694] [2024-06-27 23:54:30,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237609694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:30,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:30,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:54:30,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369939444] [2024-06-27 23:54:30,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:30,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:54:30,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:30,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:54:30,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:54:30,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:54:30,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 431 transitions, 6170 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:30,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:30,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:54:30,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:32,438 INFO L124 PetriNetUnfolderBase]: 5278/8592 cut-off events. [2024-06-27 23:54:32,438 INFO L125 PetriNetUnfolderBase]: For 560206/560206 co-relation queries the response was YES. [2024-06-27 23:54:32,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60350 conditions, 8592 events. 5278/8592 cut-off events. For 560206/560206 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 58108 event pairs, 2395 based on Foata normal form. 1/8592 useless extension candidates. Maximal degree in co-relation 60209. Up to 8278 conditions per place. [2024-06-27 23:54:32,552 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 425 selfloop transitions, 16 changer transitions 0/446 dead transitions. [2024-06-27 23:54:32,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 446 transitions, 7170 flow [2024-06-27 23:54:32,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:54:32,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:54:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 23:54:32,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 23:54:32,554 INFO L175 Difference]: Start difference. First operand has 289 places, 431 transitions, 6170 flow. Second operand 7 states and 116 transitions. [2024-06-27 23:54:32,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 446 transitions, 7170 flow [2024-06-27 23:54:34,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 446 transitions, 7133 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 23:54:34,635 INFO L231 Difference]: Finished difference. Result has 293 places, 434 transitions, 6233 flow [2024-06-27 23:54:34,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6133, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6233, PETRI_PLACES=293, PETRI_TRANSITIONS=434} [2024-06-27 23:54:34,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-27 23:54:34,635 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 434 transitions, 6233 flow [2024-06-27 23:54:34,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:34,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:34,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:34,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 23:54:34,636 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:34,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:34,637 INFO L85 PathProgramCache]: Analyzing trace with hash 358194867, now seen corresponding path program 2 times [2024-06-27 23:54:34,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:34,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436898129] [2024-06-27 23:54:34,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:34,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:35,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:35,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436898129] [2024-06-27 23:54:35,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436898129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:35,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:35,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:54:35,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269398327] [2024-06-27 23:54:35,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:35,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:54:35,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:35,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:54:35,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:54:35,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:54:35,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 434 transitions, 6233 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-27 23:54:35,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:35,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:54:35,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:37,258 INFO L124 PetriNetUnfolderBase]: 5205/8524 cut-off events. [2024-06-27 23:54:37,258 INFO L125 PetriNetUnfolderBase]: For 578292/578292 co-relation queries the response was YES. [2024-06-27 23:54:37,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60613 conditions, 8524 events. 5205/8524 cut-off events. For 578292/578292 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 58189 event pairs, 2360 based on Foata normal form. 1/8524 useless extension candidates. Maximal degree in co-relation 60470. Up to 8079 conditions per place. [2024-06-27 23:54:37,368 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 413 selfloop transitions, 26 changer transitions 0/453 dead transitions. [2024-06-27 23:54:37,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 453 transitions, 7417 flow [2024-06-27 23:54:37,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:54:37,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:54:37,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 23:54:37,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-27 23:54:37,369 INFO L175 Difference]: Start difference. First operand has 293 places, 434 transitions, 6233 flow. Second operand 7 states and 127 transitions. [2024-06-27 23:54:37,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 453 transitions, 7417 flow [2024-06-27 23:54:39,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 453 transitions, 7339 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 23:54:39,213 INFO L231 Difference]: Finished difference. Result has 296 places, 440 transitions, 6323 flow [2024-06-27 23:54:39,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6155, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6323, PETRI_PLACES=296, PETRI_TRANSITIONS=440} [2024-06-27 23:54:39,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-27 23:54:39,214 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 440 transitions, 6323 flow [2024-06-27 23:54:39,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-27 23:54:39,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:39,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:39,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 23:54:39,215 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:39,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:39,216 INFO L85 PathProgramCache]: Analyzing trace with hash 317275057, now seen corresponding path program 2 times [2024-06-27 23:54:39,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:39,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480424283] [2024-06-27 23:54:39,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:39,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:40,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:40,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480424283] [2024-06-27 23:54:40,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480424283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:40,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:40,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:54:40,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344425214] [2024-06-27 23:54:40,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:40,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:54:40,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:40,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:54:40,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:54:40,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:54:40,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 440 transitions, 6323 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:40,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:40,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:54:40,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:42,028 INFO L124 PetriNetUnfolderBase]: 5296/8618 cut-off events. [2024-06-27 23:54:42,028 INFO L125 PetriNetUnfolderBase]: For 593807/593811 co-relation queries the response was YES. [2024-06-27 23:54:42,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62446 conditions, 8618 events. 5296/8618 cut-off events. For 593807/593811 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 58316 event pairs, 2399 based on Foata normal form. 5/8622 useless extension candidates. Maximal degree in co-relation 62301. Up to 8287 conditions per place. [2024-06-27 23:54:42,141 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 422 selfloop transitions, 29 changer transitions 0/456 dead transitions. [2024-06-27 23:54:42,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 456 transitions, 7547 flow [2024-06-27 23:54:42,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:54:42,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:54:42,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 23:54:42,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-27 23:54:42,142 INFO L175 Difference]: Start difference. First operand has 296 places, 440 transitions, 6323 flow. Second operand 7 states and 117 transitions. [2024-06-27 23:54:42,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 456 transitions, 7547 flow [2024-06-27 23:54:44,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 456 transitions, 7488 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-27 23:54:44,458 INFO L231 Difference]: Finished difference. Result has 300 places, 446 transitions, 6462 flow [2024-06-27 23:54:44,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6264, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6462, PETRI_PLACES=300, PETRI_TRANSITIONS=446} [2024-06-27 23:54:44,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-27 23:54:44,459 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 446 transitions, 6462 flow [2024-06-27 23:54:44,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:44,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:44,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:44,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 23:54:44,459 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:44,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:44,460 INFO L85 PathProgramCache]: Analyzing trace with hash 317037907, now seen corresponding path program 3 times [2024-06-27 23:54:44,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:44,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652084760] [2024-06-27 23:54:44,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:44,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:45,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:45,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652084760] [2024-06-27 23:54:45,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652084760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:45,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:45,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:54:45,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258542539] [2024-06-27 23:54:45,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:45,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:54:45,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:45,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:54:45,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:54:45,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:54:45,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 446 transitions, 6462 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:45,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:45,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:54:45,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:47,112 INFO L124 PetriNetUnfolderBase]: 5293/8614 cut-off events. [2024-06-27 23:54:47,113 INFO L125 PetriNetUnfolderBase]: For 605777/605781 co-relation queries the response was YES. [2024-06-27 23:54:47,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62780 conditions, 8614 events. 5293/8614 cut-off events. For 605777/605781 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 58304 event pairs, 2399 based on Foata normal form. 5/8618 useless extension candidates. Maximal degree in co-relation 62633. Up to 8284 conditions per place. [2024-06-27 23:54:47,231 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 422 selfloop transitions, 28 changer transitions 0/455 dead transitions. [2024-06-27 23:54:47,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 455 transitions, 7400 flow [2024-06-27 23:54:47,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:54:47,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:54:47,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 23:54:47,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-27 23:54:47,233 INFO L175 Difference]: Start difference. First operand has 300 places, 446 transitions, 6462 flow. Second operand 7 states and 117 transitions. [2024-06-27 23:54:47,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 455 transitions, 7400 flow [2024-06-27 23:54:49,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 455 transitions, 7275 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-27 23:54:49,173 INFO L231 Difference]: Finished difference. Result has 304 places, 446 transitions, 6399 flow [2024-06-27 23:54:49,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6337, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6399, PETRI_PLACES=304, PETRI_TRANSITIONS=446} [2024-06-27 23:54:49,173 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-27 23:54:49,174 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 446 transitions, 6399 flow [2024-06-27 23:54:49,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:49,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:49,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:49,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 23:54:49,174 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:49,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:49,175 INFO L85 PathProgramCache]: Analyzing trace with hash 2038949303, now seen corresponding path program 3 times [2024-06-27 23:54:49,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:49,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234882322] [2024-06-27 23:54:49,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:49,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:50,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:50,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234882322] [2024-06-27 23:54:50,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234882322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:50,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:50,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:54:50,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166057077] [2024-06-27 23:54:50,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:50,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:54:50,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:50,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:54:50,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:54:50,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 23:54:50,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 446 transitions, 6399 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-27 23:54:50,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:50,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 23:54:50,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:52,063 INFO L124 PetriNetUnfolderBase]: 5204/8525 cut-off events. [2024-06-27 23:54:52,064 INFO L125 PetriNetUnfolderBase]: For 616255/616257 co-relation queries the response was YES. [2024-06-27 23:54:52,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62380 conditions, 8525 events. 5204/8525 cut-off events. For 616255/616257 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 58195 event pairs, 2372 based on Foata normal form. 1/8525 useless extension candidates. Maximal degree in co-relation 62231. Up to 8068 conditions per place. [2024-06-27 23:54:52,183 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 410 selfloop transitions, 33 changer transitions 0/459 dead transitions. [2024-06-27 23:54:52,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 459 transitions, 7533 flow [2024-06-27 23:54:52,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:54:52,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:54:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 23:54:52,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 23:54:52,184 INFO L175 Difference]: Start difference. First operand has 304 places, 446 transitions, 6399 flow. Second operand 7 states and 126 transitions. [2024-06-27 23:54:52,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 459 transitions, 7533 flow [2024-06-27 23:54:54,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 459 transitions, 7457 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 23:54:54,746 INFO L231 Difference]: Finished difference. Result has 305 places, 449 transitions, 6451 flow [2024-06-27 23:54:54,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6323, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6451, PETRI_PLACES=305, PETRI_TRANSITIONS=449} [2024-06-27 23:54:54,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-27 23:54:54,747 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 449 transitions, 6451 flow [2024-06-27 23:54:54,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-27 23:54:54,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:54,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:54,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 23:54:54,747 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:54,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:54,748 INFO L85 PathProgramCache]: Analyzing trace with hash 674231736, now seen corresponding path program 1 times [2024-06-27 23:54:54,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:54,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832548484] [2024-06-27 23:54:54,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:54,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:54:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:54:55,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:54:55,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832548484] [2024-06-27 23:54:55,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832548484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:54:55,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:54:55,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:54:55,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313915775] [2024-06-27 23:54:55,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:54:55,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:54:55,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:54:55,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:54:55,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:54:55,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:54:55,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 449 transitions, 6451 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:55,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:54:55,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:54:55,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:54:57,696 INFO L124 PetriNetUnfolderBase]: 5413/8759 cut-off events. [2024-06-27 23:54:57,696 INFO L125 PetriNetUnfolderBase]: For 730946/730952 co-relation queries the response was YES. [2024-06-27 23:54:57,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67116 conditions, 8759 events. 5413/8759 cut-off events. For 730946/730952 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 58878 event pairs, 1977 based on Foata normal form. 7/8765 useless extension candidates. Maximal degree in co-relation 66966. Up to 8343 conditions per place. [2024-06-27 23:54:57,815 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 412 selfloop transitions, 39 changer transitions 0/466 dead transitions. [2024-06-27 23:54:57,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 466 transitions, 7469 flow [2024-06-27 23:54:57,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:54:57,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:54:57,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 23:54:57,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-27 23:54:57,817 INFO L175 Difference]: Start difference. First operand has 305 places, 449 transitions, 6451 flow. Second operand 7 states and 124 transitions. [2024-06-27 23:54:57,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 466 transitions, 7469 flow [2024-06-27 23:54:59,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 466 transitions, 7363 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 23:54:59,518 INFO L231 Difference]: Finished difference. Result has 307 places, 452 transitions, 6499 flow [2024-06-27 23:54:59,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6345, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6499, PETRI_PLACES=307, PETRI_TRANSITIONS=452} [2024-06-27 23:54:59,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-27 23:54:59,519 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 452 transitions, 6499 flow [2024-06-27 23:54:59,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:54:59,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:54:59,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:54:59,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 23:54:59,520 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:54:59,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:54:59,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1991447936, now seen corresponding path program 2 times [2024-06-27 23:54:59,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:54:59,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101811011] [2024-06-27 23:54:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:54:59,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:54:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:00,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:00,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101811011] [2024-06-27 23:55:00,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101811011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:00,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:00,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:55:00,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546028994] [2024-06-27 23:55:00,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:00,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:55:00,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:00,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:55:00,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:55:00,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:55:00,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 452 transitions, 6499 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:00,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:00,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:55:00,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:02,466 INFO L124 PetriNetUnfolderBase]: 5424/8777 cut-off events. [2024-06-27 23:55:02,466 INFO L125 PetriNetUnfolderBase]: For 751231/751237 co-relation queries the response was YES. [2024-06-27 23:55:02,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67881 conditions, 8777 events. 5424/8777 cut-off events. For 751231/751237 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 59090 event pairs, 1979 based on Foata normal form. 7/8783 useless extension candidates. Maximal degree in co-relation 67730. Up to 8344 conditions per place. [2024-06-27 23:55:02,590 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 413 selfloop transitions, 48 changer transitions 0/476 dead transitions. [2024-06-27 23:55:02,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 476 transitions, 7819 flow [2024-06-27 23:55:02,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:55:02,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:55:02,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 23:55:02,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 23:55:02,591 INFO L175 Difference]: Start difference. First operand has 307 places, 452 transitions, 6499 flow. Second operand 7 states and 123 transitions. [2024-06-27 23:55:02,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 476 transitions, 7819 flow [2024-06-27 23:55:05,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 476 transitions, 7691 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 23:55:05,684 INFO L231 Difference]: Finished difference. Result has 310 places, 463 transitions, 6694 flow [2024-06-27 23:55:05,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6371, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6694, PETRI_PLACES=310, PETRI_TRANSITIONS=463} [2024-06-27 23:55:05,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-27 23:55:05,684 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 463 transitions, 6694 flow [2024-06-27 23:55:05,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:05,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:05,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:05,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 23:55:05,685 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:05,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:05,685 INFO L85 PathProgramCache]: Analyzing trace with hash 679953592, now seen corresponding path program 1 times [2024-06-27 23:55:05,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:05,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472466367] [2024-06-27 23:55:05,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:05,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:06,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:06,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472466367] [2024-06-27 23:55:06,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472466367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:06,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:06,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:55:06,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954406331] [2024-06-27 23:55:06,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:06,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:55:06,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:06,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:55:06,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:55:06,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:55:06,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 463 transitions, 6694 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:06,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:06,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:55:06,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:08,679 INFO L124 PetriNetUnfolderBase]: 5274/8510 cut-off events. [2024-06-27 23:55:08,680 INFO L125 PetriNetUnfolderBase]: For 771484/771517 co-relation queries the response was YES. [2024-06-27 23:55:08,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67027 conditions, 8510 events. 5274/8510 cut-off events. For 771484/771517 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 56788 event pairs, 1669 based on Foata normal form. 4/8433 useless extension candidates. Maximal degree in co-relation 66874. Up to 8098 conditions per place. [2024-06-27 23:55:08,802 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 389 selfloop transitions, 55 changer transitions 0/479 dead transitions. [2024-06-27 23:55:08,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 479 transitions, 7676 flow [2024-06-27 23:55:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:55:08,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:55:08,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 23:55:08,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 23:55:08,803 INFO L175 Difference]: Start difference. First operand has 310 places, 463 transitions, 6694 flow. Second operand 8 states and 132 transitions. [2024-06-27 23:55:08,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 479 transitions, 7676 flow [2024-06-27 23:55:10,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 479 transitions, 7538 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-27 23:55:10,632 INFO L231 Difference]: Finished difference. Result has 315 places, 466 transitions, 6723 flow [2024-06-27 23:55:10,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6556, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6723, PETRI_PLACES=315, PETRI_TRANSITIONS=466} [2024-06-27 23:55:10,633 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-27 23:55:10,633 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 466 transitions, 6723 flow [2024-06-27 23:55:10,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:10,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:10,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:10,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 23:55:10,634 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:10,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:10,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1870341560, now seen corresponding path program 3 times [2024-06-27 23:55:10,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:10,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396907775] [2024-06-27 23:55:10,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:10,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:11,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:11,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396907775] [2024-06-27 23:55:11,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396907775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:11,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:11,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:55:11,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079097293] [2024-06-27 23:55:11,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:11,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:55:11,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:11,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:55:11,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:55:11,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:55:11,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 466 transitions, 6723 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:11,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:11,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:55:11,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:13,522 INFO L124 PetriNetUnfolderBase]: 5434/8792 cut-off events. [2024-06-27 23:55:13,522 INFO L125 PetriNetUnfolderBase]: For 784150/784160 co-relation queries the response was YES. [2024-06-27 23:55:13,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68947 conditions, 8792 events. 5434/8792 cut-off events. For 784150/784160 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 59083 event pairs, 1976 based on Foata normal form. 5/8791 useless extension candidates. Maximal degree in co-relation 68793. Up to 8376 conditions per place. [2024-06-27 23:55:13,653 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 426 selfloop transitions, 40 changer transitions 0/481 dead transitions. [2024-06-27 23:55:13,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 481 transitions, 7736 flow [2024-06-27 23:55:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:55:13,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:55:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 23:55:13,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-27 23:55:13,654 INFO L175 Difference]: Start difference. First operand has 315 places, 466 transitions, 6723 flow. Second operand 7 states and 122 transitions. [2024-06-27 23:55:13,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 481 transitions, 7736 flow [2024-06-27 23:55:15,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 481 transitions, 7555 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 23:55:15,351 INFO L231 Difference]: Finished difference. Result has 316 places, 467 transitions, 6644 flow [2024-06-27 23:55:15,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6546, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6644, PETRI_PLACES=316, PETRI_TRANSITIONS=467} [2024-06-27 23:55:15,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-27 23:55:15,351 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 467 transitions, 6644 flow [2024-06-27 23:55:15,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:15,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:15,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:15,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 23:55:15,352 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:15,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:15,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1416389862, now seen corresponding path program 4 times [2024-06-27 23:55:15,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:15,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701420583] [2024-06-27 23:55:15,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:15,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:16,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:16,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701420583] [2024-06-27 23:55:16,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701420583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:16,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:16,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:55:16,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106833746] [2024-06-27 23:55:16,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:16,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:55:16,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:16,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:55:16,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:55:16,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:55:16,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 467 transitions, 6644 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:16,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:16,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:55:16,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:18,169 INFO L124 PetriNetUnfolderBase]: 5447/8810 cut-off events. [2024-06-27 23:55:18,169 INFO L125 PetriNetUnfolderBase]: For 803960/803970 co-relation queries the response was YES. [2024-06-27 23:55:18,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69317 conditions, 8810 events. 5447/8810 cut-off events. For 803960/803970 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 59224 event pairs, 1976 based on Foata normal form. 5/8809 useless extension candidates. Maximal degree in co-relation 69162. Up to 8377 conditions per place. [2024-06-27 23:55:18,288 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 420 selfloop transitions, 51 changer transitions 0/486 dead transitions. [2024-06-27 23:55:18,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 486 transitions, 7958 flow [2024-06-27 23:55:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:55:18,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:55:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 23:55:18,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 23:55:18,289 INFO L175 Difference]: Start difference. First operand has 316 places, 467 transitions, 6644 flow. Second operand 8 states and 130 transitions. [2024-06-27 23:55:18,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 486 transitions, 7958 flow [2024-06-27 23:55:20,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 486 transitions, 7871 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 23:55:20,359 INFO L231 Difference]: Finished difference. Result has 319 places, 473 transitions, 6811 flow [2024-06-27 23:55:20,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6557, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6811, PETRI_PLACES=319, PETRI_TRANSITIONS=473} [2024-06-27 23:55:20,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-27 23:55:20,360 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 473 transitions, 6811 flow [2024-06-27 23:55:20,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:20,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:20,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:20,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 23:55:20,361 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:20,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:20,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1217088072, now seen corresponding path program 5 times [2024-06-27 23:55:20,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:20,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566074814] [2024-06-27 23:55:20,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:20,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:21,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:21,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566074814] [2024-06-27 23:55:21,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566074814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:21,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:21,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:55:21,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125998001] [2024-06-27 23:55:21,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:21,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:55:21,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:21,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:55:21,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:55:21,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:55:21,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 473 transitions, 6811 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:21,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:21,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:55:21,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:23,245 INFO L124 PetriNetUnfolderBase]: 5454/8818 cut-off events. [2024-06-27 23:55:23,245 INFO L125 PetriNetUnfolderBase]: For 824430/824444 co-relation queries the response was YES. [2024-06-27 23:55:23,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69920 conditions, 8818 events. 5454/8818 cut-off events. For 824430/824444 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 59181 event pairs, 1962 based on Foata normal form. 9/8821 useless extension candidates. Maximal degree in co-relation 69764. Up to 8352 conditions per place. [2024-06-27 23:55:23,370 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 408 selfloop transitions, 72 changer transitions 0/495 dead transitions. [2024-06-27 23:55:23,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 495 transitions, 8361 flow [2024-06-27 23:55:23,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:55:23,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:55:23,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 23:55:23,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 23:55:23,560 INFO L175 Difference]: Start difference. First operand has 319 places, 473 transitions, 6811 flow. Second operand 8 states and 130 transitions. [2024-06-27 23:55:23,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 495 transitions, 8361 flow [2024-06-27 23:55:25,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 495 transitions, 8242 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 23:55:25,494 INFO L231 Difference]: Finished difference. Result has 324 places, 484 transitions, 7103 flow [2024-06-27 23:55:25,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6692, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7103, PETRI_PLACES=324, PETRI_TRANSITIONS=484} [2024-06-27 23:55:25,495 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-27 23:55:25,495 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 484 transitions, 7103 flow [2024-06-27 23:55:25,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:25,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:25,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:25,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 23:55:25,496 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:25,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:25,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1222801992, now seen corresponding path program 6 times [2024-06-27 23:55:25,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:25,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810366954] [2024-06-27 23:55:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:25,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:26,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:26,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810366954] [2024-06-27 23:55:26,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810366954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:26,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:26,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:55:26,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607422871] [2024-06-27 23:55:26,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:26,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:55:26,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:26,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:55:26,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:55:26,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:55:26,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 484 transitions, 7103 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:26,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:26,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:55:26,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:28,628 INFO L124 PetriNetUnfolderBase]: 5459/8825 cut-off events. [2024-06-27 23:55:28,629 INFO L125 PetriNetUnfolderBase]: For 844344/844358 co-relation queries the response was YES. [2024-06-27 23:55:28,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70646 conditions, 8825 events. 5459/8825 cut-off events. For 844344/844358 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 59250 event pairs, 1962 based on Foata normal form. 9/8828 useless extension candidates. Maximal degree in co-relation 70487. Up to 8358 conditions per place. [2024-06-27 23:55:28,743 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 409 selfloop transitions, 73 changer transitions 0/497 dead transitions. [2024-06-27 23:55:28,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 497 transitions, 8361 flow [2024-06-27 23:55:28,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:55:28,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:55:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 23:55:28,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-27 23:55:28,744 INFO L175 Difference]: Start difference. First operand has 324 places, 484 transitions, 7103 flow. Second operand 8 states and 129 transitions. [2024-06-27 23:55:28,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 497 transitions, 8361 flow [2024-06-27 23:55:31,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 497 transitions, 8200 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-27 23:55:31,594 INFO L231 Difference]: Finished difference. Result has 329 places, 487 transitions, 7176 flow [2024-06-27 23:55:31,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6962, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7176, PETRI_PLACES=329, PETRI_TRANSITIONS=487} [2024-06-27 23:55:31,595 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-27 23:55:31,595 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 487 transitions, 7176 flow [2024-06-27 23:55:31,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:31,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:31,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:31,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 23:55:31,595 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:31,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:31,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1209907046, now seen corresponding path program 2 times [2024-06-27 23:55:31,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:31,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049150894] [2024-06-27 23:55:31,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:31,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:32,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:32,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049150894] [2024-06-27 23:55:32,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049150894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:32,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:32,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:55:32,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192396571] [2024-06-27 23:55:32,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:32,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:55:32,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:32,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:55:32,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:55:32,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:55:32,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 487 transitions, 7176 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:32,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:32,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:55:32,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:34,935 INFO L124 PetriNetUnfolderBase]: 5318/8567 cut-off events. [2024-06-27 23:55:34,935 INFO L125 PetriNetUnfolderBase]: For 861320/861349 co-relation queries the response was YES. [2024-06-27 23:55:35,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69068 conditions, 8567 events. 5318/8567 cut-off events. For 861320/861349 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 57067 event pairs, 1673 based on Foata normal form. 7/8491 useless extension candidates. Maximal degree in co-relation 68907. Up to 8083 conditions per place. [2024-06-27 23:55:35,057 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 379 selfloop transitions, 89 changer transitions 0/510 dead transitions. [2024-06-27 23:55:35,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 510 transitions, 8662 flow [2024-06-27 23:55:35,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:55:35,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:55:35,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 23:55:35,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-27 23:55:35,059 INFO L175 Difference]: Start difference. First operand has 329 places, 487 transitions, 7176 flow. Second operand 9 states and 143 transitions. [2024-06-27 23:55:35,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 510 transitions, 8662 flow [2024-06-27 23:55:38,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 510 transitions, 8512 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 23:55:38,137 INFO L231 Difference]: Finished difference. Result has 335 places, 498 transitions, 7409 flow [2024-06-27 23:55:38,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7026, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7409, PETRI_PLACES=335, PETRI_TRANSITIONS=498} [2024-06-27 23:55:38,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-27 23:55:38,137 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 498 transitions, 7409 flow [2024-06-27 23:55:38,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:38,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:38,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:38,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 23:55:38,138 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:38,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:38,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1209461576, now seen corresponding path program 3 times [2024-06-27 23:55:38,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:38,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140968939] [2024-06-27 23:55:38,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:38,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:39,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:39,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140968939] [2024-06-27 23:55:39,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140968939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:39,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:39,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:55:39,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389792934] [2024-06-27 23:55:39,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:39,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:55:39,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:39,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:55:39,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:55:39,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:55:39,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 498 transitions, 7409 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:39,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:39,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:55:39,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:41,292 INFO L124 PetriNetUnfolderBase]: 5312/8559 cut-off events. [2024-06-27 23:55:41,292 INFO L125 PetriNetUnfolderBase]: For 876315/876344 co-relation queries the response was YES. [2024-06-27 23:55:41,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69636 conditions, 8559 events. 5312/8559 cut-off events. For 876315/876344 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 57051 event pairs, 1672 based on Foata normal form. 12/8488 useless extension candidates. Maximal degree in co-relation 69473. Up to 8078 conditions per place. [2024-06-27 23:55:41,423 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 374 selfloop transitions, 94 changer transitions 0/510 dead transitions. [2024-06-27 23:55:41,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 510 transitions, 8741 flow [2024-06-27 23:55:41,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:55:41,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:55:41,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 23:55:41,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 23:55:41,425 INFO L175 Difference]: Start difference. First operand has 335 places, 498 transitions, 7409 flow. Second operand 8 states and 133 transitions. [2024-06-27 23:55:41,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 510 transitions, 8741 flow [2024-06-27 23:55:44,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 510 transitions, 8575 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-27 23:55:44,710 INFO L231 Difference]: Finished difference. Result has 339 places, 498 transitions, 7437 flow [2024-06-27 23:55:44,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7243, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7437, PETRI_PLACES=339, PETRI_TRANSITIONS=498} [2024-06-27 23:55:44,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-27 23:55:44,711 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 498 transitions, 7437 flow [2024-06-27 23:55:44,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:44,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:44,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:44,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 23:55:44,712 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:44,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:44,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1222794056, now seen corresponding path program 4 times [2024-06-27 23:55:44,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:44,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633542017] [2024-06-27 23:55:44,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:44,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:45,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:45,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633542017] [2024-06-27 23:55:45,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633542017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:45,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:45,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:55:45,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845730223] [2024-06-27 23:55:45,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:45,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:55:45,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:45,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:55:45,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:55:45,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:55:45,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 498 transitions, 7437 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:45,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:45,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:55:45,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:47,858 INFO L124 PetriNetUnfolderBase]: 5321/8574 cut-off events. [2024-06-27 23:55:47,858 INFO L125 PetriNetUnfolderBase]: For 893968/893993 co-relation queries the response was YES. [2024-06-27 23:55:47,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70104 conditions, 8574 events. 5321/8574 cut-off events. For 893968/893993 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 57131 event pairs, 1672 based on Foata normal form. 4/8495 useless extension candidates. Maximal degree in co-relation 69939. Up to 8088 conditions per place. [2024-06-27 23:55:47,982 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 386 selfloop transitions, 84 changer transitions 0/512 dead transitions. [2024-06-27 23:55:47,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 512 transitions, 8654 flow [2024-06-27 23:55:47,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:55:47,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:55:47,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 23:55:47,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-27 23:55:47,983 INFO L175 Difference]: Start difference. First operand has 339 places, 498 transitions, 7437 flow. Second operand 9 states and 143 transitions. [2024-06-27 23:55:47,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 512 transitions, 8654 flow [2024-06-27 23:55:51,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 512 transitions, 8465 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 23:55:51,404 INFO L231 Difference]: Finished difference. Result has 342 places, 501 transitions, 7479 flow [2024-06-27 23:55:51,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7255, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7479, PETRI_PLACES=342, PETRI_TRANSITIONS=501} [2024-06-27 23:55:51,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-27 23:55:51,405 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 501 transitions, 7479 flow [2024-06-27 23:55:51,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:51,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:51,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:51,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 23:55:51,405 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:51,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:51,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1549324326, now seen corresponding path program 7 times [2024-06-27 23:55:51,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:51,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942048117] [2024-06-27 23:55:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:51,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:52,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:52,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942048117] [2024-06-27 23:55:52,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942048117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:52,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:52,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:55:52,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300249941] [2024-06-27 23:55:52,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:52,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:55:52,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:52,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:55:52,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:55:52,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:55:52,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 501 transitions, 7479 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:52,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:52,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:55:52,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:55:54,252 INFO L124 PetriNetUnfolderBase]: 5480/8855 cut-off events. [2024-06-27 23:55:54,253 INFO L125 PetriNetUnfolderBase]: For 904987/904993 co-relation queries the response was YES. [2024-06-27 23:55:54,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71726 conditions, 8855 events. 5480/8855 cut-off events. For 904987/904993 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 59559 event pairs, 1970 based on Foata normal form. 7/8853 useless extension candidates. Maximal degree in co-relation 71560. Up to 8439 conditions per place. [2024-06-27 23:55:54,396 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 44 changer transitions 0/525 dead transitions. [2024-06-27 23:55:54,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 525 transitions, 8642 flow [2024-06-27 23:55:54,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:55:54,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:55:54,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 23:55:54,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-27 23:55:54,398 INFO L175 Difference]: Start difference. First operand has 342 places, 501 transitions, 7479 flow. Second operand 7 states and 132 transitions. [2024-06-27 23:55:54,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 525 transitions, 8642 flow [2024-06-27 23:55:57,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 525 transitions, 8457 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 23:55:57,345 INFO L231 Difference]: Finished difference. Result has 343 places, 504 transitions, 7437 flow [2024-06-27 23:55:57,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7294, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7437, PETRI_PLACES=343, PETRI_TRANSITIONS=504} [2024-06-27 23:55:57,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-27 23:55:57,346 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 504 transitions, 7437 flow [2024-06-27 23:55:57,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:57,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:55:57,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:55:57,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 23:55:57,346 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:55:57,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:55:57,347 INFO L85 PathProgramCache]: Analyzing trace with hash 924814934, now seen corresponding path program 8 times [2024-06-27 23:55:57,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:55:57,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679033401] [2024-06-27 23:55:57,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:55:57,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:55:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:55:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:55:58,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:55:58,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679033401] [2024-06-27 23:55:58,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679033401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:55:58,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:55:58,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:55:58,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827007951] [2024-06-27 23:55:58,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:55:58,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:55:58,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:55:58,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:55:58,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:55:58,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:55:58,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 504 transitions, 7437 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:55:58,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:55:58,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:55:58,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:00,246 INFO L124 PetriNetUnfolderBase]: 5492/8874 cut-off events. [2024-06-27 23:56:00,246 INFO L125 PetriNetUnfolderBase]: For 918130/918136 co-relation queries the response was YES. [2024-06-27 23:56:00,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71796 conditions, 8874 events. 5492/8874 cut-off events. For 918130/918136 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 59696 event pairs, 1976 based on Foata normal form. 7/8876 useless extension candidates. Maximal degree in co-relation 71630. Up to 8438 conditions per place. [2024-06-27 23:56:00,382 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 456 selfloop transitions, 60 changer transitions 0/531 dead transitions. [2024-06-27 23:56:00,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 531 transitions, 8657 flow [2024-06-27 23:56:00,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:56:00,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:56:00,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 23:56:00,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 23:56:00,383 INFO L175 Difference]: Start difference. First operand has 343 places, 504 transitions, 7437 flow. Second operand 7 states and 130 transitions. [2024-06-27 23:56:00,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 531 transitions, 8657 flow [2024-06-27 23:56:03,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 531 transitions, 8503 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 23:56:03,759 INFO L231 Difference]: Finished difference. Result has 345 places, 513 transitions, 7563 flow [2024-06-27 23:56:03,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7289, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7563, PETRI_PLACES=345, PETRI_TRANSITIONS=513} [2024-06-27 23:56:03,760 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-27 23:56:03,760 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 513 transitions, 7563 flow [2024-06-27 23:56:03,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:03,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:03,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:03,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 23:56:03,761 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:03,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:03,761 INFO L85 PathProgramCache]: Analyzing trace with hash 10525517, now seen corresponding path program 1 times [2024-06-27 23:56:03,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:03,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618658495] [2024-06-27 23:56:03,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:03,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:56:04,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:04,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618658495] [2024-06-27 23:56:04,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618658495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:04,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:04,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:56:04,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811447775] [2024-06-27 23:56:04,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:04,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:56:04,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:04,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:56:04,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:56:04,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:56:04,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 513 transitions, 7563 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:04,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:04,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:56:04,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:06,838 INFO L124 PetriNetUnfolderBase]: 5601/8987 cut-off events. [2024-06-27 23:56:06,838 INFO L125 PetriNetUnfolderBase]: For 933548/933548 co-relation queries the response was YES. [2024-06-27 23:56:06,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72685 conditions, 8987 events. 5601/8987 cut-off events. For 933548/933548 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 59745 event pairs, 1728 based on Foata normal form. 1/8987 useless extension candidates. Maximal degree in co-relation 72517. Up to 8642 conditions per place. [2024-06-27 23:56:06,991 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 471 selfloop transitions, 67 changer transitions 0/542 dead transitions. [2024-06-27 23:56:06,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 542 transitions, 9043 flow [2024-06-27 23:56:06,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:56:06,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:56:06,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 23:56:06,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 23:56:06,992 INFO L175 Difference]: Start difference. First operand has 345 places, 513 transitions, 7563 flow. Second operand 8 states and 138 transitions. [2024-06-27 23:56:06,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 542 transitions, 9043 flow [2024-06-27 23:56:10,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 542 transitions, 8877 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 23:56:10,693 INFO L231 Difference]: Finished difference. Result has 347 places, 522 transitions, 7683 flow [2024-06-27 23:56:10,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7397, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7683, PETRI_PLACES=347, PETRI_TRANSITIONS=522} [2024-06-27 23:56:10,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-27 23:56:10,696 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 522 transitions, 7683 flow [2024-06-27 23:56:10,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:10,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:10,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:10,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 23:56:10,704 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:10,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:10,705 INFO L85 PathProgramCache]: Analyzing trace with hash 10536677, now seen corresponding path program 2 times [2024-06-27 23:56:10,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:10,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493324391] [2024-06-27 23:56:10,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:10,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:56:11,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:11,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493324391] [2024-06-27 23:56:11,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493324391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:11,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:11,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:56:11,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860466712] [2024-06-27 23:56:11,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:11,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:56:11,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:11,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:56:11,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:56:11,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:56:11,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 522 transitions, 7683 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:11,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:11,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:56:11,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:13,789 INFO L124 PetriNetUnfolderBase]: 5598/8983 cut-off events. [2024-06-27 23:56:13,789 INFO L125 PetriNetUnfolderBase]: For 948210/948210 co-relation queries the response was YES. [2024-06-27 23:56:13,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72781 conditions, 8983 events. 5598/8983 cut-off events. For 948210/948210 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 59720 event pairs, 1728 based on Foata normal form. 1/8983 useless extension candidates. Maximal degree in co-relation 72612. Up to 8639 conditions per place. [2024-06-27 23:56:13,936 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 468 selfloop transitions, 69 changer transitions 0/541 dead transitions. [2024-06-27 23:56:13,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 541 transitions, 8839 flow [2024-06-27 23:56:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:56:13,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:56:13,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 23:56:13,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 23:56:13,937 INFO L175 Difference]: Start difference. First operand has 347 places, 522 transitions, 7683 flow. Second operand 8 states and 136 transitions. [2024-06-27 23:56:13,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 541 transitions, 8839 flow [2024-06-27 23:56:18,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 541 transitions, 8625 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 23:56:18,074 INFO L231 Difference]: Finished difference. Result has 349 places, 522 transitions, 7616 flow [2024-06-27 23:56:18,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7469, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7616, PETRI_PLACES=349, PETRI_TRANSITIONS=522} [2024-06-27 23:56:18,075 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-27 23:56:18,075 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 522 transitions, 7616 flow [2024-06-27 23:56:18,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:18,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:18,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:18,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 23:56:18,076 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:18,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:18,076 INFO L85 PathProgramCache]: Analyzing trace with hash 924822870, now seen corresponding path program 5 times [2024-06-27 23:56:18,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:18,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214161159] [2024-06-27 23:56:18,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:18,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:56:19,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:19,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214161159] [2024-06-27 23:56:19,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214161159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:19,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:19,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:56:19,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481575743] [2024-06-27 23:56:19,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:19,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:56:19,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:19,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:56:19,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:56:19,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:56:19,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 522 transitions, 7616 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:19,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:19,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:56:19,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:21,085 INFO L124 PetriNetUnfolderBase]: 5610/9000 cut-off events. [2024-06-27 23:56:21,085 INFO L125 PetriNetUnfolderBase]: For 965950/965950 co-relation queries the response was YES. [2024-06-27 23:56:21,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73029 conditions, 9000 events. 5610/9000 cut-off events. For 965950/965950 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 59799 event pairs, 1728 based on Foata normal form. 2/9001 useless extension candidates. Maximal degree in co-relation 72859. Up to 8662 conditions per place. [2024-06-27 23:56:21,235 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 484 selfloop transitions, 60 changer transitions 0/548 dead transitions. [2024-06-27 23:56:21,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 548 transitions, 8882 flow [2024-06-27 23:56:21,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:56:21,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:56:21,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 23:56:21,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 23:56:21,236 INFO L175 Difference]: Start difference. First operand has 349 places, 522 transitions, 7616 flow. Second operand 8 states and 137 transitions. [2024-06-27 23:56:21,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 548 transitions, 8882 flow [2024-06-27 23:56:25,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 548 transitions, 8713 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 23:56:25,110 INFO L231 Difference]: Finished difference. Result has 350 places, 529 transitions, 7688 flow [2024-06-27 23:56:25,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7447, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7688, PETRI_PLACES=350, PETRI_TRANSITIONS=529} [2024-06-27 23:56:25,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-27 23:56:25,111 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 529 transitions, 7688 flow [2024-06-27 23:56:25,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:25,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:25,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:25,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 23:56:25,111 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:25,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:25,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1877968056, now seen corresponding path program 1 times [2024-06-27 23:56:25,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:25,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593806364] [2024-06-27 23:56:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:25,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:56:26,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:26,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593806364] [2024-06-27 23:56:26,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593806364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:26,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:26,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:56:26,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103052660] [2024-06-27 23:56:26,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:26,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:56:26,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:26,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:56:26,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:56:26,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:56:26,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 529 transitions, 7688 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:26,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:26,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:56:26,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:28,571 INFO L124 PetriNetUnfolderBase]: 5515/8910 cut-off events. [2024-06-27 23:56:28,572 INFO L125 PetriNetUnfolderBase]: For 984495/984495 co-relation queries the response was YES. [2024-06-27 23:56:28,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72800 conditions, 8910 events. 5515/8910 cut-off events. For 984495/984495 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 59889 event pairs, 2444 based on Foata normal form. 2/8907 useless extension candidates. Maximal degree in co-relation 72629. Up to 8522 conditions per place. [2024-06-27 23:56:28,691 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 506 selfloop transitions, 23 changer transitions 0/547 dead transitions. [2024-06-27 23:56:28,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 547 transitions, 8896 flow [2024-06-27 23:56:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:56:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:56:28,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 23:56:28,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-27 23:56:28,692 INFO L175 Difference]: Start difference. First operand has 350 places, 529 transitions, 7688 flow. Second operand 7 states and 121 transitions. [2024-06-27 23:56:28,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 547 transitions, 8896 flow [2024-06-27 23:56:32,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 547 transitions, 8717 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 23:56:32,601 INFO L231 Difference]: Finished difference. Result has 351 places, 532 transitions, 7637 flow [2024-06-27 23:56:32,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7509, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7637, PETRI_PLACES=351, PETRI_TRANSITIONS=532} [2024-06-27 23:56:32,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-27 23:56:32,602 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 532 transitions, 7637 flow [2024-06-27 23:56:32,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:32,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:32,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:32,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 23:56:32,602 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:32,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:32,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1878058421, now seen corresponding path program 1 times [2024-06-27 23:56:32,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:32,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091718779] [2024-06-27 23:56:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:32,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:56:33,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:33,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091718779] [2024-06-27 23:56:33,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091718779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:33,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:33,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:56:33,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628284271] [2024-06-27 23:56:33,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:33,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:56:33,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:33,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:56:33,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:56:33,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:56:33,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 532 transitions, 7637 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:33,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:33,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:56:33,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:35,804 INFO L124 PetriNetUnfolderBase]: 5513/8912 cut-off events. [2024-06-27 23:56:35,804 INFO L125 PetriNetUnfolderBase]: For 996834/996834 co-relation queries the response was YES. [2024-06-27 23:56:35,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73241 conditions, 8912 events. 5513/8912 cut-off events. For 996834/996834 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 59970 event pairs, 2450 based on Foata normal form. 1/8912 useless extension candidates. Maximal degree in co-relation 73068. Up to 8531 conditions per place. [2024-06-27 23:56:35,953 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 517 selfloop transitions, 22 changer transitions 0/551 dead transitions. [2024-06-27 23:56:35,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 551 transitions, 8855 flow [2024-06-27 23:56:35,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:56:35,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:56:35,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 23:56:35,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-27 23:56:35,955 INFO L175 Difference]: Start difference. First operand has 351 places, 532 transitions, 7637 flow. Second operand 9 states and 142 transitions. [2024-06-27 23:56:35,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 551 transitions, 8855 flow [2024-06-27 23:56:40,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 551 transitions, 8759 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 23:56:40,991 INFO L231 Difference]: Finished difference. Result has 355 places, 535 transitions, 7649 flow [2024-06-27 23:56:40,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7543, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7649, PETRI_PLACES=355, PETRI_TRANSITIONS=535} [2024-06-27 23:56:40,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-27 23:56:40,991 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 535 transitions, 7649 flow [2024-06-27 23:56:40,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:40,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:40,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:40,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 23:56:40,992 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:40,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:40,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1038933880, now seen corresponding path program 2 times [2024-06-27 23:56:40,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:40,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073799066] [2024-06-27 23:56:40,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:40,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:41,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:56:42,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:42,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073799066] [2024-06-27 23:56:42,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073799066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:42,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:42,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:56:42,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574065279] [2024-06-27 23:56:42,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:42,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:56:42,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:42,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:56:42,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:56:42,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:56:42,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 535 transitions, 7649 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:42,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:42,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:56:42,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:44,485 INFO L124 PetriNetUnfolderBase]: 5535/8934 cut-off events. [2024-06-27 23:56:44,485 INFO L125 PetriNetUnfolderBase]: For 1000817/1000817 co-relation queries the response was YES. [2024-06-27 23:56:44,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74153 conditions, 8934 events. 5535/8934 cut-off events. For 1000817/1000817 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 60000 event pairs, 2430 based on Foata normal form. 1/8930 useless extension candidates. Maximal degree in co-relation 73979. Up to 8535 conditions per place. [2024-06-27 23:56:44,635 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 501 selfloop transitions, 30 changer transitions 0/550 dead transitions. [2024-06-27 23:56:44,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 550 transitions, 8841 flow [2024-06-27 23:56:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:56:44,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:56:44,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 23:56:44,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-27 23:56:44,637 INFO L175 Difference]: Start difference. First operand has 355 places, 535 transitions, 7649 flow. Second operand 7 states and 121 transitions. [2024-06-27 23:56:44,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 550 transitions, 8841 flow [2024-06-27 23:56:48,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 550 transitions, 8753 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 23:56:48,487 INFO L231 Difference]: Finished difference. Result has 355 places, 538 transitions, 7703 flow [2024-06-27 23:56:48,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7561, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7703, PETRI_PLACES=355, PETRI_TRANSITIONS=538} [2024-06-27 23:56:48,487 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-27 23:56:48,487 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 538 transitions, 7703 flow [2024-06-27 23:56:48,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:48,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:48,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:48,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 23:56:48,488 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:48,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:48,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1780859945, now seen corresponding path program 2 times [2024-06-27 23:56:48,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:48,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592381423] [2024-06-27 23:56:48,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:48,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:56:49,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:49,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592381423] [2024-06-27 23:56:49,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592381423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:49,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:49,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:56:49,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549773380] [2024-06-27 23:56:49,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:49,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:56:49,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:49,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:56:49,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:56:49,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:56:49,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 538 transitions, 7703 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:49,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:49,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:56:49,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:51,737 INFO L124 PetriNetUnfolderBase]: 5539/8948 cut-off events. [2024-06-27 23:56:51,737 INFO L125 PetriNetUnfolderBase]: For 1029383/1029383 co-relation queries the response was YES. [2024-06-27 23:56:51,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75094 conditions, 8948 events. 5539/8948 cut-off events. For 1029383/1029383 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 60131 event pairs, 2428 based on Foata normal form. 1/8948 useless extension candidates. Maximal degree in co-relation 74919. Up to 8544 conditions per place. [2024-06-27 23:56:51,895 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 512 selfloop transitions, 38 changer transitions 0/562 dead transitions. [2024-06-27 23:56:51,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 562 transitions, 9439 flow [2024-06-27 23:56:51,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:56:51,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:56:51,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 23:56:51,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 23:56:51,897 INFO L175 Difference]: Start difference. First operand has 355 places, 538 transitions, 7703 flow. Second operand 8 states and 137 transitions. [2024-06-27 23:56:51,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 562 transitions, 9439 flow [2024-06-27 23:56:55,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 562 transitions, 9327 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 23:56:55,946 INFO L231 Difference]: Finished difference. Result has 359 places, 547 transitions, 7879 flow [2024-06-27 23:56:55,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7591, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7879, PETRI_PLACES=359, PETRI_TRANSITIONS=547} [2024-06-27 23:56:55,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-27 23:56:55,946 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 547 transitions, 7879 flow [2024-06-27 23:56:55,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:55,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:56:55,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:56:55,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 23:56:55,947 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:56:55,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:56:55,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1780854365, now seen corresponding path program 3 times [2024-06-27 23:56:55,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:56:55,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933667267] [2024-06-27 23:56:55,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:56:55,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:56:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:56:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:56:57,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:56:57,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933667267] [2024-06-27 23:56:57,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933667267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:56:57,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:56:57,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:56:57,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890478356] [2024-06-27 23:56:57,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:56:57,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:56:57,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:56:57,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:56:57,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:56:57,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:56:57,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 547 transitions, 7879 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:56:57,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:56:57,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:56:57,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:56:59,509 INFO L124 PetriNetUnfolderBase]: 5536/8944 cut-off events. [2024-06-27 23:56:59,510 INFO L125 PetriNetUnfolderBase]: For 1050556/1050556 co-relation queries the response was YES. [2024-06-27 23:56:59,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76343 conditions, 8944 events. 5536/8944 cut-off events. For 1050556/1050556 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 60173 event pairs, 2428 based on Foata normal form. 1/8944 useless extension candidates. Maximal degree in co-relation 76166. Up to 8541 conditions per place. [2024-06-27 23:56:59,657 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 509 selfloop transitions, 40 changer transitions 0/561 dead transitions. [2024-06-27 23:56:59,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 561 transitions, 9239 flow [2024-06-27 23:56:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:56:59,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:56:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 23:56:59,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 23:56:59,659 INFO L175 Difference]: Start difference. First operand has 359 places, 547 transitions, 7879 flow. Second operand 8 states and 136 transitions. [2024-06-27 23:56:59,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 561 transitions, 9239 flow [2024-06-27 23:57:04,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 561 transitions, 9103 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-27 23:57:04,362 INFO L231 Difference]: Finished difference. Result has 363 places, 547 transitions, 7829 flow [2024-06-27 23:57:04,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7743, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7829, PETRI_PLACES=363, PETRI_TRANSITIONS=547} [2024-06-27 23:57:04,362 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-27 23:57:04,363 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 547 transitions, 7829 flow [2024-06-27 23:57:04,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:04,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:04,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:04,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 23:57:04,363 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:57:04,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:04,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1541251634, now seen corresponding path program 1 times [2024-06-27 23:57:04,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:04,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267772666] [2024-06-27 23:57:04,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:04,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:57:05,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:05,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267772666] [2024-06-27 23:57:05,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267772666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:05,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:05,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:57:05,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940332261] [2024-06-27 23:57:05,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:05,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:57:05,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:05,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:57:05,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:57:05,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:57:05,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 547 transitions, 7829 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:05,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:05,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:57:05,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:07,844 INFO L124 PetriNetUnfolderBase]: 5541/8958 cut-off events. [2024-06-27 23:57:07,845 INFO L125 PetriNetUnfolderBase]: For 1072345/1072345 co-relation queries the response was YES. [2024-06-27 23:57:07,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76023 conditions, 8958 events. 5541/8958 cut-off events. For 1072345/1072345 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 60340 event pairs, 2428 based on Foata normal form. 2/8959 useless extension candidates. Maximal degree in co-relation 75845. Up to 8585 conditions per place. [2024-06-27 23:57:07,972 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 532 selfloop transitions, 19 changer transitions 0/563 dead transitions. [2024-06-27 23:57:07,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 563 transitions, 9067 flow [2024-06-27 23:57:07,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:57:07,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:57:07,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-27 23:57:07,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-27 23:57:07,974 INFO L175 Difference]: Start difference. First operand has 363 places, 547 transitions, 7829 flow. Second operand 9 states and 138 transitions. [2024-06-27 23:57:07,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 563 transitions, 9067 flow [2024-06-27 23:57:11,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 563 transitions, 8989 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 23:57:11,952 INFO L231 Difference]: Finished difference. Result has 366 places, 550 transitions, 7873 flow [2024-06-27 23:57:11,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7751, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7873, PETRI_PLACES=366, PETRI_TRANSITIONS=550} [2024-06-27 23:57:11,952 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-27 23:57:11,953 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 550 transitions, 7873 flow [2024-06-27 23:57:11,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:11,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:11,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:11,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 23:57:11,953 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:57:11,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:11,953 INFO L85 PathProgramCache]: Analyzing trace with hash 936091879, now seen corresponding path program 4 times [2024-06-27 23:57:11,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:11,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725528939] [2024-06-27 23:57:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:11,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:11,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:13,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:57:13,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:13,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725528939] [2024-06-27 23:57:13,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725528939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:13,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:13,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:57:13,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352320197] [2024-06-27 23:57:13,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:13,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:57:13,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:13,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:57:13,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:57:13,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:57:13,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 550 transitions, 7873 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:13,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:13,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:57:13,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:15,300 INFO L124 PetriNetUnfolderBase]: 5554/8978 cut-off events. [2024-06-27 23:57:15,301 INFO L125 PetriNetUnfolderBase]: For 1091921/1091923 co-relation queries the response was YES. [2024-06-27 23:57:15,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76722 conditions, 8978 events. 5554/8978 cut-off events. For 1091921/1091923 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 60483 event pairs, 2460 based on Foata normal form. 1/8978 useless extension candidates. Maximal degree in co-relation 76543. Up to 8537 conditions per place. [2024-06-27 23:57:15,435 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 502 selfloop transitions, 58 changer transitions 0/572 dead transitions. [2024-06-27 23:57:15,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 572 transitions, 9831 flow [2024-06-27 23:57:15,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:57:15,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:57:15,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 23:57:15,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 23:57:15,451 INFO L175 Difference]: Start difference. First operand has 366 places, 550 transitions, 7873 flow. Second operand 8 states and 139 transitions. [2024-06-27 23:57:15,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 572 transitions, 9831 flow [2024-06-27 23:57:21,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 572 transitions, 9731 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 23:57:21,475 INFO L231 Difference]: Finished difference. Result has 367 places, 559 transitions, 8093 flow [2024-06-27 23:57:21,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7773, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8093, PETRI_PLACES=367, PETRI_TRANSITIONS=559} [2024-06-27 23:57:21,475 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-27 23:57:21,476 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 559 transitions, 8093 flow [2024-06-27 23:57:21,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:21,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:21,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:21,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 23:57:21,476 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:57:21,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:21,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1238241622, now seen corresponding path program 2 times [2024-06-27 23:57:21,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:21,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741906772] [2024-06-27 23:57:21,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:21,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:57:22,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:22,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741906772] [2024-06-27 23:57:22,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741906772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:22,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:22,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:57:22,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147482520] [2024-06-27 23:57:22,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:22,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:57:22,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:22,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:57:22,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:57:22,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:57:22,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 559 transitions, 8093 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:22,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:22,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:57:22,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:24,749 INFO L124 PetriNetUnfolderBase]: 5564/8986 cut-off events. [2024-06-27 23:57:24,749 INFO L125 PetriNetUnfolderBase]: For 1121715/1121719 co-relation queries the response was YES. [2024-06-27 23:57:24,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77846 conditions, 8986 events. 5564/8986 cut-off events. For 1121715/1121719 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 60461 event pairs, 2452 based on Foata normal form. 6/8991 useless extension candidates. Maximal degree in co-relation 77666. Up to 8584 conditions per place. [2024-06-27 23:57:24,908 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 525 selfloop transitions, 39 changer transitions 0/576 dead transitions. [2024-06-27 23:57:24,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 576 transitions, 9625 flow [2024-06-27 23:57:24,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:57:24,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:57:24,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 23:57:24,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-27 23:57:24,910 INFO L175 Difference]: Start difference. First operand has 367 places, 559 transitions, 8093 flow. Second operand 9 states and 142 transitions. [2024-06-27 23:57:24,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 576 transitions, 9625 flow [2024-06-27 23:57:30,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 576 transitions, 9463 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 23:57:30,325 INFO L231 Difference]: Finished difference. Result has 372 places, 565 transitions, 8181 flow [2024-06-27 23:57:30,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7935, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8181, PETRI_PLACES=372, PETRI_TRANSITIONS=565} [2024-06-27 23:57:30,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-27 23:57:30,326 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 565 transitions, 8181 flow [2024-06-27 23:57:30,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:30,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:30,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:30,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 23:57:30,327 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:57:30,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:30,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1238235670, now seen corresponding path program 3 times [2024-06-27 23:57:30,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:30,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479290021] [2024-06-27 23:57:30,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:30,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:57:31,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:31,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479290021] [2024-06-27 23:57:31,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479290021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:31,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:31,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:57:31,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194264211] [2024-06-27 23:57:31,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:31,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:57:31,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:31,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:57:31,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:57:31,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:57:31,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 565 transitions, 8181 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:31,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:31,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:57:31,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:33,856 INFO L124 PetriNetUnfolderBase]: 5583/9003 cut-off events. [2024-06-27 23:57:33,857 INFO L125 PetriNetUnfolderBase]: For 1132792/1132794 co-relation queries the response was YES. [2024-06-27 23:57:33,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77753 conditions, 9003 events. 5583/9003 cut-off events. For 1132792/1132794 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 60499 event pairs, 2462 based on Foata normal form. 1/8999 useless extension candidates. Maximal degree in co-relation 77572. Up to 8578 conditions per place. [2024-06-27 23:57:33,999 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 513 selfloop transitions, 39 changer transitions 0/577 dead transitions. [2024-06-27 23:57:34,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 577 transitions, 9405 flow [2024-06-27 23:57:34,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:57:34,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:57:34,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 23:57:34,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-27 23:57:34,001 INFO L175 Difference]: Start difference. First operand has 372 places, 565 transitions, 8181 flow. Second operand 7 states and 120 transitions. [2024-06-27 23:57:34,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 577 transitions, 9405 flow [2024-06-27 23:57:38,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 577 transitions, 9294 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 23:57:38,359 INFO L231 Difference]: Finished difference. Result has 374 places, 568 transitions, 8244 flow [2024-06-27 23:57:38,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8070, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8244, PETRI_PLACES=374, PETRI_TRANSITIONS=568} [2024-06-27 23:57:38,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-27 23:57:38,360 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 568 transitions, 8244 flow [2024-06-27 23:57:38,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:38,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:38,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:38,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 23:57:38,360 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:57:38,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:38,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1238235825, now seen corresponding path program 5 times [2024-06-27 23:57:38,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:38,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916047833] [2024-06-27 23:57:38,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:38,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:57:39,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:39,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916047833] [2024-06-27 23:57:39,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916047833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:39,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:39,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:57:39,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167568016] [2024-06-27 23:57:39,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:39,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:57:39,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:39,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:57:39,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:57:39,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:57:39,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 568 transitions, 8244 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:39,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:39,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:57:39,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:42,058 INFO L124 PetriNetUnfolderBase]: 5553/8974 cut-off events. [2024-06-27 23:57:42,058 INFO L125 PetriNetUnfolderBase]: For 1145375/1145377 co-relation queries the response was YES. [2024-06-27 23:57:42,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77935 conditions, 8974 events. 5553/8974 cut-off events. For 1145375/1145377 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 60440 event pairs, 2460 based on Foata normal form. 1/8974 useless extension candidates. Maximal degree in co-relation 77752. Up to 8537 conditions per place. [2024-06-27 23:57:42,188 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 509 selfloop transitions, 59 changer transitions 0/580 dead transitions. [2024-06-27 23:57:42,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 580 transitions, 9836 flow [2024-06-27 23:57:42,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:57:42,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:57:42,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 23:57:42,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 23:57:42,190 INFO L175 Difference]: Start difference. First operand has 374 places, 568 transitions, 8244 flow. Second operand 8 states and 137 transitions. [2024-06-27 23:57:42,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 580 transitions, 9836 flow [2024-06-27 23:57:47,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 580 transitions, 9650 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-27 23:57:47,983 INFO L231 Difference]: Finished difference. Result has 377 places, 568 transitions, 8182 flow [2024-06-27 23:57:47,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8058, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8182, PETRI_PLACES=377, PETRI_TRANSITIONS=568} [2024-06-27 23:57:47,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-27 23:57:47,983 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 568 transitions, 8182 flow [2024-06-27 23:57:47,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:47,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:47,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:47,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 23:57:47,984 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:57:47,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:47,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1209722534, now seen corresponding path program 3 times [2024-06-27 23:57:47,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:47,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264680964] [2024-06-27 23:57:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:47,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:57:49,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:49,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264680964] [2024-06-27 23:57:49,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264680964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:49,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:49,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:57:49,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564269882] [2024-06-27 23:57:49,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:49,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:57:49,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:49,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:57:49,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:57:49,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:57:49,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 568 transitions, 8182 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:49,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:49,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:57:49,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:57:51,370 INFO L124 PetriNetUnfolderBase]: 5563/8987 cut-off events. [2024-06-27 23:57:51,370 INFO L125 PetriNetUnfolderBase]: For 1171105/1171109 co-relation queries the response was YES. [2024-06-27 23:57:51,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78240 conditions, 8987 events. 5563/8987 cut-off events. For 1171105/1171109 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 60488 event pairs, 2452 based on Foata normal form. 6/8992 useless extension candidates. Maximal degree in co-relation 78056. Up to 8582 conditions per place. [2024-06-27 23:57:51,528 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 527 selfloop transitions, 43 changer transitions 0/582 dead transitions. [2024-06-27 23:57:51,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 582 transitions, 9650 flow [2024-06-27 23:57:51,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:57:51,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:57:51,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 23:57:51,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-27 23:57:51,530 INFO L175 Difference]: Start difference. First operand has 377 places, 568 transitions, 8182 flow. Second operand 9 states and 141 transitions. [2024-06-27 23:57:51,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 582 transitions, 9650 flow [2024-06-27 23:57:58,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 582 transitions, 9532 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 23:57:58,061 INFO L231 Difference]: Finished difference. Result has 380 places, 571 transitions, 8234 flow [2024-06-27 23:57:58,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8064, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8234, PETRI_PLACES=380, PETRI_TRANSITIONS=571} [2024-06-27 23:57:58,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-27 23:57:58,062 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 571 transitions, 8234 flow [2024-06-27 23:57:58,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:58,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:57:58,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:57:58,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 23:57:58,063 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:57:58,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:57:58,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1209722751, now seen corresponding path program 6 times [2024-06-27 23:57:58,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:57:58,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579431374] [2024-06-27 23:57:58,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:57:58,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:57:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:57:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:57:59,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:57:59,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579431374] [2024-06-27 23:57:59,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579431374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:57:59,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:57:59,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:57:59,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618954997] [2024-06-27 23:57:59,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:57:59,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:57:59,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:57:59,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:57:59,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:57:59,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:57:59,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 571 transitions, 8234 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:57:59,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:57:59,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:57:59,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:01,484 INFO L124 PetriNetUnfolderBase]: 5555/8979 cut-off events. [2024-06-27 23:58:01,484 INFO L125 PetriNetUnfolderBase]: For 1180154/1180156 co-relation queries the response was YES. [2024-06-27 23:58:01,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78186 conditions, 8979 events. 5555/8979 cut-off events. For 1180154/1180156 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 60438 event pairs, 2460 based on Foata normal form. 1/8979 useless extension candidates. Maximal degree in co-relation 78001. Up to 8541 conditions per place. [2024-06-27 23:58:01,635 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 508 selfloop transitions, 62 changer transitions 0/582 dead transitions. [2024-06-27 23:58:01,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 582 transitions, 9626 flow [2024-06-27 23:58:01,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:58:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:58:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 23:58:01,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 23:58:01,636 INFO L175 Difference]: Start difference. First operand has 380 places, 571 transitions, 8234 flow. Second operand 8 states and 136 transitions. [2024-06-27 23:58:01,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 582 transitions, 9626 flow [2024-06-27 23:58:08,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 582 transitions, 9430 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 23:58:08,020 INFO L231 Difference]: Finished difference. Result has 381 places, 571 transitions, 8168 flow [2024-06-27 23:58:08,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8038, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8168, PETRI_PLACES=381, PETRI_TRANSITIONS=571} [2024-06-27 23:58:08,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-27 23:58:08,021 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 571 transitions, 8168 flow [2024-06-27 23:58:08,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:08,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:08,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:08,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 23:58:08,022 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:58:08,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:08,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1245860182, now seen corresponding path program 4 times [2024-06-27 23:58:08,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:08,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153199849] [2024-06-27 23:58:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:08,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:09,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:09,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153199849] [2024-06-27 23:58:09,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153199849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:09,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:09,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:58:09,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655139549] [2024-06-27 23:58:09,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:09,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:58:09,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:09,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:58:09,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:58:09,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:58:09,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 571 transitions, 8168 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:09,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:09,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:58:09,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:11,290 INFO L124 PetriNetUnfolderBase]: 5554/8975 cut-off events. [2024-06-27 23:58:11,290 INFO L125 PetriNetUnfolderBase]: For 1194508/1194512 co-relation queries the response was YES. [2024-06-27 23:58:11,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78098 conditions, 8975 events. 5554/8975 cut-off events. For 1194508/1194512 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 60418 event pairs, 2452 based on Foata normal form. 6/8980 useless extension candidates. Maximal degree in co-relation 77912. Up to 8573 conditions per place. [2024-06-27 23:58:11,451 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 524 selfloop transitions, 45 changer transitions 0/581 dead transitions. [2024-06-27 23:58:11,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 581 transitions, 9346 flow [2024-06-27 23:58:11,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:58:11,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:58:11,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 23:58:11,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 23:58:11,452 INFO L175 Difference]: Start difference. First operand has 381 places, 571 transitions, 8168 flow. Second operand 8 states and 130 transitions. [2024-06-27 23:58:11,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 581 transitions, 9346 flow [2024-06-27 23:58:17,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 581 transitions, 9140 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-27 23:58:17,991 INFO L231 Difference]: Finished difference. Result has 381 places, 571 transitions, 8059 flow [2024-06-27 23:58:17,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7962, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8059, PETRI_PLACES=381, PETRI_TRANSITIONS=571} [2024-06-27 23:58:17,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-27 23:58:17,992 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 571 transitions, 8059 flow [2024-06-27 23:58:17,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:17,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:17,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:17,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 23:58:17,992 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:58:17,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:17,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1209445704, now seen corresponding path program 1 times [2024-06-27 23:58:17,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:17,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582193475] [2024-06-27 23:58:17,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:17,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:19,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:19,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582193475] [2024-06-27 23:58:19,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582193475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:19,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:19,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:58:19,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644826292] [2024-06-27 23:58:19,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:19,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:58:19,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:19,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:58:19,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:58:19,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:58:19,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 571 transitions, 8059 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:19,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:19,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:58:19,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:22,111 INFO L124 PetriNetUnfolderBase]: 5406/8706 cut-off events. [2024-06-27 23:58:22,111 INFO L125 PetriNetUnfolderBase]: For 1211344/1211370 co-relation queries the response was YES. [2024-06-27 23:58:22,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76695 conditions, 8706 events. 5406/8706 cut-off events. For 1211344/1211370 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 58345 event pairs, 2388 based on Foata normal form. 5/8622 useless extension candidates. Maximal degree in co-relation 76508. Up to 8332 conditions per place. [2024-06-27 23:58:22,243 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 517 selfloop transitions, 22 changer transitions 0/586 dead transitions. [2024-06-27 23:58:22,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 586 transitions, 9260 flow [2024-06-27 23:58:22,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:58:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:58:22,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-27 23:58:22,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-27 23:58:22,245 INFO L175 Difference]: Start difference. First operand has 381 places, 571 transitions, 8059 flow. Second operand 9 states and 139 transitions. [2024-06-27 23:58:22,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 586 transitions, 9260 flow [2024-06-27 23:58:27,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 586 transitions, 9160 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 23:58:27,665 INFO L231 Difference]: Finished difference. Result has 384 places, 575 transitions, 8102 flow [2024-06-27 23:58:27,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7959, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8102, PETRI_PLACES=384, PETRI_TRANSITIONS=575} [2024-06-27 23:58:27,665 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-27 23:58:27,665 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 575 transitions, 8102 flow [2024-06-27 23:58:27,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:27,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:27,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:27,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 23:58:27,666 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:58:27,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:27,666 INFO L85 PathProgramCache]: Analyzing trace with hash -689241670, now seen corresponding path program 1 times [2024-06-27 23:58:27,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:27,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472952911] [2024-06-27 23:58:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:27,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:28,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:28,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472952911] [2024-06-27 23:58:28,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472952911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:28,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:28,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:58:28,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792211467] [2024-06-27 23:58:28,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:28,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:58:28,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:28,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:58:28,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:58:28,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:58:28,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 575 transitions, 8102 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:28,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:28,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:58:28,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:30,982 INFO L124 PetriNetUnfolderBase]: 5583/9005 cut-off events. [2024-06-27 23:58:30,982 INFO L125 PetriNetUnfolderBase]: For 1226282/1226282 co-relation queries the response was YES. [2024-06-27 23:58:31,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78846 conditions, 9005 events. 5583/9005 cut-off events. For 1226282/1226282 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 60427 event pairs, 1755 based on Foata normal form. 1/9001 useless extension candidates. Maximal degree in co-relation 78657. Up to 8546 conditions per place. [2024-06-27 23:58:31,138 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 521 selfloop transitions, 50 changer transitions 0/596 dead transitions. [2024-06-27 23:58:31,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 596 transitions, 9396 flow [2024-06-27 23:58:31,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:58:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:58:31,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 23:58:31,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 23:58:31,139 INFO L175 Difference]: Start difference. First operand has 384 places, 575 transitions, 8102 flow. Second operand 9 states and 150 transitions. [2024-06-27 23:58:31,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 596 transitions, 9396 flow [2024-06-27 23:58:38,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 596 transitions, 9239 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 23:58:38,345 INFO L231 Difference]: Finished difference. Result has 386 places, 578 transitions, 8146 flow [2024-06-27 23:58:38,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7945, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8146, PETRI_PLACES=386, PETRI_TRANSITIONS=578} [2024-06-27 23:58:38,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-27 23:58:38,346 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 578 transitions, 8146 flow [2024-06-27 23:58:38,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:38,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:38,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:38,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 23:58:38,347 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:58:38,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:38,347 INFO L85 PathProgramCache]: Analyzing trace with hash -683527750, now seen corresponding path program 2 times [2024-06-27 23:58:38,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:38,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289094497] [2024-06-27 23:58:38,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:38,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:39,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:39,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289094497] [2024-06-27 23:58:39,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289094497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:39,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:39,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:58:39,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556764409] [2024-06-27 23:58:39,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:39,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:58:39,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:39,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:58:39,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:58:39,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:58:39,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 578 transitions, 8146 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:39,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:39,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:58:39,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:41,698 INFO L124 PetriNetUnfolderBase]: 5593/9020 cut-off events. [2024-06-27 23:58:41,698 INFO L125 PetriNetUnfolderBase]: For 1248893/1248893 co-relation queries the response was YES. [2024-06-27 23:58:41,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79610 conditions, 9020 events. 5593/9020 cut-off events. For 1248893/1248893 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 60490 event pairs, 1754 based on Foata normal form. 1/9013 useless extension candidates. Maximal degree in co-relation 79421. Up to 8547 conditions per place. [2024-06-27 23:58:41,848 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 519 selfloop transitions, 59 changer transitions 0/603 dead transitions. [2024-06-27 23:58:41,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 603 transitions, 9496 flow [2024-06-27 23:58:41,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:58:41,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:58:41,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 23:58:41,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 23:58:41,850 INFO L175 Difference]: Start difference. First operand has 386 places, 578 transitions, 8146 flow. Second operand 9 states and 155 transitions. [2024-06-27 23:58:41,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 603 transitions, 9496 flow [2024-06-27 23:58:50,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 603 transitions, 9334 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 23:58:50,231 INFO L231 Difference]: Finished difference. Result has 390 places, 584 transitions, 8263 flow [2024-06-27 23:58:50,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7984, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8263, PETRI_PLACES=390, PETRI_TRANSITIONS=584} [2024-06-27 23:58:50,232 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-27 23:58:50,232 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 584 transitions, 8263 flow [2024-06-27 23:58:50,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:50,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:58:50,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:58:50,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 23:58:50,233 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:58:50,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:58:50,233 INFO L85 PathProgramCache]: Analyzing trace with hash -573771754, now seen corresponding path program 1 times [2024-06-27 23:58:50,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:58:50,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961838842] [2024-06-27 23:58:50,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:58:50,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:58:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:58:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:58:51,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:58:51,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961838842] [2024-06-27 23:58:51,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961838842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:58:51,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:58:51,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:58:51,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138867581] [2024-06-27 23:58:51,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:58:51,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:58:51,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:58:51,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:58:51,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:58:51,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:58:51,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 584 transitions, 8263 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:58:51,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:58:51,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:58:51,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:58:53,515 INFO L124 PetriNetUnfolderBase]: 5598/9031 cut-off events. [2024-06-27 23:58:53,516 INFO L125 PetriNetUnfolderBase]: For 1276450/1276454 co-relation queries the response was YES. [2024-06-27 23:58:53,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80354 conditions, 9031 events. 5598/9031 cut-off events. For 1276450/1276454 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 60754 event pairs, 1903 based on Foata normal form. 3/9029 useless extension candidates. Maximal degree in co-relation 80163. Up to 8453 conditions per place. [2024-06-27 23:58:53,675 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 519 selfloop transitions, 71 changer transitions 0/615 dead transitions. [2024-06-27 23:58:53,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 615 transitions, 9683 flow [2024-06-27 23:58:53,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:58:53,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:58:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 23:58:53,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 23:58:53,677 INFO L175 Difference]: Start difference. First operand has 390 places, 584 transitions, 8263 flow. Second operand 9 states and 154 transitions. [2024-06-27 23:58:53,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 615 transitions, 9683 flow [2024-06-27 23:59:00,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 615 transitions, 9481 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-27 23:59:00,695 INFO L231 Difference]: Finished difference. Result has 393 places, 594 transitions, 8363 flow [2024-06-27 23:59:00,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8061, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8363, PETRI_PLACES=393, PETRI_TRANSITIONS=594} [2024-06-27 23:59:00,695 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-27 23:59:00,695 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 594 transitions, 8363 flow [2024-06-27 23:59:00,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:00,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:00,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:00,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 23:59:00,696 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:59:00,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:00,697 INFO L85 PathProgramCache]: Analyzing trace with hash -573950500, now seen corresponding path program 3 times [2024-06-27 23:59:00,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:00,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129981052] [2024-06-27 23:59:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:00,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:01,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:01,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129981052] [2024-06-27 23:59:01,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129981052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:01,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:01,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:59:01,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567604607] [2024-06-27 23:59:01,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:01,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:59:01,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:01,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:59:01,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:59:01,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:59:01,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 594 transitions, 8363 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:01,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:01,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:59:01,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:04,107 INFO L124 PetriNetUnfolderBase]: 5603/9039 cut-off events. [2024-06-27 23:59:04,107 INFO L125 PetriNetUnfolderBase]: For 1301414/1301418 co-relation queries the response was YES. [2024-06-27 23:59:04,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81990 conditions, 9039 events. 5603/9039 cut-off events. For 1301414/1301418 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 60709 event pairs, 1618 based on Foata normal form. 5/9039 useless extension candidates. Maximal degree in co-relation 81797. Up to 8464 conditions per place. [2024-06-27 23:59:04,239 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 498 selfloop transitions, 91 changer transitions 0/614 dead transitions. [2024-06-27 23:59:04,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 614 transitions, 9703 flow [2024-06-27 23:59:04,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:59:04,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:59:04,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 23:59:04,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 23:59:04,240 INFO L175 Difference]: Start difference. First operand has 393 places, 594 transitions, 8363 flow. Second operand 9 states and 153 transitions. [2024-06-27 23:59:04,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 614 transitions, 9703 flow [2024-06-27 23:59:11,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 614 transitions, 9538 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 23:59:11,630 INFO L231 Difference]: Finished difference. Result has 397 places, 597 transitions, 8494 flow [2024-06-27 23:59:11,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8198, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8494, PETRI_PLACES=397, PETRI_TRANSITIONS=597} [2024-06-27 23:59:11,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-27 23:59:11,631 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 597 transitions, 8494 flow [2024-06-27 23:59:11,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:11,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:11,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:11,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 23:59:11,632 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:59:11,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:11,632 INFO L85 PathProgramCache]: Analyzing trace with hash 732082930, now seen corresponding path program 2 times [2024-06-27 23:59:11,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:11,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303343008] [2024-06-27 23:59:11,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:11,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:12,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:12,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303343008] [2024-06-27 23:59:12,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303343008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:12,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:12,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:59:12,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335512961] [2024-06-27 23:59:12,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:12,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:59:12,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:12,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:59:12,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:59:12,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:59:12,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 597 transitions, 8494 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:12,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:12,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:59:12,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:15,077 INFO L124 PetriNetUnfolderBase]: 5616/9064 cut-off events. [2024-06-27 23:59:15,078 INFO L125 PetriNetUnfolderBase]: For 1335052/1335056 co-relation queries the response was YES. [2024-06-27 23:59:15,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82954 conditions, 9064 events. 5616/9064 cut-off events. For 1335052/1335056 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 61087 event pairs, 1892 based on Foata normal form. 3/9062 useless extension candidates. Maximal degree in co-relation 82760. Up to 8454 conditions per place. [2024-06-27 23:59:15,245 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 515 selfloop transitions, 82 changer transitions 0/622 dead transitions. [2024-06-27 23:59:15,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 622 transitions, 10152 flow [2024-06-27 23:59:15,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:59:15,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:59:15,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 23:59:15,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 23:59:15,247 INFO L175 Difference]: Start difference. First operand has 397 places, 597 transitions, 8494 flow. Second operand 8 states and 146 transitions. [2024-06-27 23:59:15,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 622 transitions, 10152 flow [2024-06-27 23:59:23,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 622 transitions, 9882 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-27 23:59:23,673 INFO L231 Difference]: Finished difference. Result has 399 places, 603 transitions, 8570 flow [2024-06-27 23:59:23,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8224, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8570, PETRI_PLACES=399, PETRI_TRANSITIONS=603} [2024-06-27 23:59:23,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-27 23:59:23,674 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 603 transitions, 8570 flow [2024-06-27 23:59:23,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:23,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:23,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:23,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 23:59:23,675 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:59:23,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:23,675 INFO L85 PathProgramCache]: Analyzing trace with hash 561380314, now seen corresponding path program 4 times [2024-06-27 23:59:23,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:23,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265764254] [2024-06-27 23:59:23,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:23,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:24,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:24,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265764254] [2024-06-27 23:59:24,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265764254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:24,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:24,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:59:24,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449266878] [2024-06-27 23:59:24,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:24,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:59:24,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:24,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:59:24,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:59:24,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:59:24,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 603 transitions, 8570 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:24,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:24,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:59:24,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:27,176 INFO L124 PetriNetUnfolderBase]: 5619/9062 cut-off events. [2024-06-27 23:59:27,176 INFO L125 PetriNetUnfolderBase]: For 1365162/1365166 co-relation queries the response was YES. [2024-06-27 23:59:27,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84359 conditions, 9062 events. 5619/9062 cut-off events. For 1365162/1365166 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 60789 event pairs, 1597 based on Foata normal form. 5/9062 useless extension candidates. Maximal degree in co-relation 84163. Up to 8462 conditions per place. [2024-06-27 23:59:27,331 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 493 selfloop transitions, 103 changer transitions 0/621 dead transitions. [2024-06-27 23:59:27,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 621 transitions, 9926 flow [2024-06-27 23:59:27,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:59:27,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:59:27,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 23:59:27,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-27 23:59:27,332 INFO L175 Difference]: Start difference. First operand has 399 places, 603 transitions, 8570 flow. Second operand 9 states and 151 transitions. [2024-06-27 23:59:27,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 621 transitions, 9926 flow [2024-06-27 23:59:34,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 621 transitions, 9773 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 23:59:34,099 INFO L231 Difference]: Finished difference. Result has 404 places, 606 transitions, 8745 flow [2024-06-27 23:59:34,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8417, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8745, PETRI_PLACES=404, PETRI_TRANSITIONS=606} [2024-06-27 23:59:34,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-27 23:59:34,100 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 606 transitions, 8745 flow [2024-06-27 23:59:34,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:34,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:34,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:34,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 23:59:34,100 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:59:34,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:34,101 INFO L85 PathProgramCache]: Analyzing trace with hash -878353538, now seen corresponding path program 1 times [2024-06-27 23:59:34,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:34,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910289469] [2024-06-27 23:59:34,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:34,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:35,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:35,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910289469] [2024-06-27 23:59:35,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910289469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:35,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:35,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:59:35,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436247163] [2024-06-27 23:59:35,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:35,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:59:35,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:35,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:59:35,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:59:35,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:59:35,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 606 transitions, 8745 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:35,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:35,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:59:35,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:37,563 INFO L124 PetriNetUnfolderBase]: 5713/9158 cut-off events. [2024-06-27 23:59:37,563 INFO L125 PetriNetUnfolderBase]: For 1389364/1389370 co-relation queries the response was YES. [2024-06-27 23:59:37,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85886 conditions, 9158 events. 5713/9158 cut-off events. For 1389364/1389370 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 61093 event pairs, 1956 based on Foata normal form. 7/9164 useless extension candidates. Maximal degree in co-relation 85688. Up to 8828 conditions per place. [2024-06-27 23:59:37,731 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 572 selfloop transitions, 48 changer transitions 0/624 dead transitions. [2024-06-27 23:59:37,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 624 transitions, 10123 flow [2024-06-27 23:59:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:59:37,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:59:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 23:59:37,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 23:59:37,748 INFO L175 Difference]: Start difference. First operand has 404 places, 606 transitions, 8745 flow. Second operand 8 states and 130 transitions. [2024-06-27 23:59:37,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 624 transitions, 10123 flow [2024-06-27 23:59:44,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 624 transitions, 9821 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-27 23:59:44,311 INFO L231 Difference]: Finished difference. Result has 405 places, 609 transitions, 8635 flow [2024-06-27 23:59:44,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8443, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8635, PETRI_PLACES=405, PETRI_TRANSITIONS=609} [2024-06-27 23:59:44,311 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-27 23:59:44,312 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 609 transitions, 8635 flow [2024-06-27 23:59:44,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:44,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:44,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:44,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 23:59:44,312 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:59:44,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:44,313 INFO L85 PathProgramCache]: Analyzing trace with hash 738391864, now seen corresponding path program 5 times [2024-06-27 23:59:44,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:44,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321212159] [2024-06-27 23:59:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:44,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:45,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:45,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321212159] [2024-06-27 23:59:45,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321212159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:45,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:45,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:59:45,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616917179] [2024-06-27 23:59:45,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:45,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:59:45,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:45,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:59:45,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:59:45,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 23:59:45,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 609 transitions, 8635 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:45,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:45,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 23:59:45,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:47,999 INFO L124 PetriNetUnfolderBase]: 5641/9082 cut-off events. [2024-06-27 23:59:47,999 INFO L125 PetriNetUnfolderBase]: For 1413039/1413039 co-relation queries the response was YES. [2024-06-27 23:59:48,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85806 conditions, 9082 events. 5641/9082 cut-off events. For 1413039/1413039 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 60809 event pairs, 1648 based on Foata normal form. 1/9078 useless extension candidates. Maximal degree in co-relation 85607. Up to 8626 conditions per place. [2024-06-27 23:59:48,142 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 545 selfloop transitions, 54 changer transitions 0/625 dead transitions. [2024-06-27 23:59:48,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 625 transitions, 9999 flow [2024-06-27 23:59:48,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:59:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:59:48,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 23:59:48,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 23:59:48,143 INFO L175 Difference]: Start difference. First operand has 405 places, 609 transitions, 8635 flow. Second operand 8 states and 136 transitions. [2024-06-27 23:59:48,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 625 transitions, 9999 flow [2024-06-27 23:59:55,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 625 transitions, 9833 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 23:59:55,248 INFO L231 Difference]: Finished difference. Result has 407 places, 612 transitions, 8706 flow [2024-06-27 23:59:55,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8469, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8706, PETRI_PLACES=407, PETRI_TRANSITIONS=612} [2024-06-27 23:59:55,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-27 23:59:55,249 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 612 transitions, 8706 flow [2024-06-27 23:59:55,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:55,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:59:55,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:59:55,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 23:59:55,249 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:59:55,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:59:55,250 INFO L85 PathProgramCache]: Analyzing trace with hash 738512206, now seen corresponding path program 2 times [2024-06-27 23:59:55,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:59:55,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626401125] [2024-06-27 23:59:55,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:59:55,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:59:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:59:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:59:56,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:59:56,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626401125] [2024-06-27 23:59:56,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626401125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:59:56,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:59:56,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:59:56,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345239701] [2024-06-27 23:59:56,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:59:56,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:59:56,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:59:56,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:59:56,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:59:56,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 23:59:56,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 612 transitions, 8706 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:59:56,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:59:56,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 23:59:56,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:59:58,797 INFO L124 PetriNetUnfolderBase]: 5739/9196 cut-off events. [2024-06-27 23:59:58,797 INFO L125 PetriNetUnfolderBase]: For 1453070/1453076 co-relation queries the response was YES. [2024-06-27 23:59:58,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87498 conditions, 9196 events. 5739/9196 cut-off events. For 1453070/1453076 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 61374 event pairs, 1958 based on Foata normal form. 7/9202 useless extension candidates. Maximal degree in co-relation 87298. Up to 8823 conditions per place. [2024-06-27 23:59:58,959 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 566 selfloop transitions, 71 changer transitions 0/641 dead transitions. [2024-06-27 23:59:58,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 641 transitions, 10826 flow [2024-06-27 23:59:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:59:58,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:59:58,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 23:59:58,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 23:59:58,961 INFO L175 Difference]: Start difference. First operand has 407 places, 612 transitions, 8706 flow. Second operand 8 states and 132 transitions. [2024-06-27 23:59:58,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 641 transitions, 10826 flow [2024-06-28 00:00:07,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 641 transitions, 10587 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-28 00:00:07,081 INFO L231 Difference]: Finished difference. Result has 410 places, 626 transitions, 8992 flow [2024-06-28 00:00:07,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8467, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8992, PETRI_PLACES=410, PETRI_TRANSITIONS=626} [2024-06-28 00:00:07,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-28 00:00:07,082 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 626 transitions, 8992 flow [2024-06-28 00:00:07,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 00:00:07,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:00:07,082 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 00:00:07,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 00:00:07,083 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:00:07,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:00:07,083 INFO L85 PathProgramCache]: Analyzing trace with hash -396282928, now seen corresponding path program 3 times [2024-06-28 00:00:07,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:00:07,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108307002] [2024-06-28 00:00:07,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:00:07,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:00:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:00:08,273 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 00:00:08,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:00:08,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108307002] [2024-06-28 00:00:08,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108307002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:00:08,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:00:08,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:00:08,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892543258] [2024-06-28 00:00:08,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:00:08,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:00:08,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:00:08,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:00:08,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:00:08,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:00:08,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 626 transitions, 8992 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 00:00:08,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:00:08,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:00:08,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:00:10,875 INFO L124 PetriNetUnfolderBase]: 5736/9192 cut-off events. [2024-06-28 00:00:10,875 INFO L125 PetriNetUnfolderBase]: For 1470883/1470889 co-relation queries the response was YES. [2024-06-28 00:00:11,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87798 conditions, 9192 events. 5736/9192 cut-off events. For 1470883/1470889 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 61330 event pairs, 1958 based on Foata normal form. 7/9198 useless extension candidates. Maximal degree in co-relation 87597. Up to 8820 conditions per place. [2024-06-28 00:00:11,109 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 560 selfloop transitions, 76 changer transitions 0/640 dead transitions. [2024-06-28 00:00:11,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 640 transitions, 10550 flow [2024-06-28 00:00:11,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:00:11,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:00:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 00:00:11,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-28 00:00:11,111 INFO L175 Difference]: Start difference. First operand has 410 places, 626 transitions, 8992 flow. Second operand 8 states and 130 transitions. [2024-06-28 00:00:11,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 640 transitions, 10550 flow [2024-06-28 00:00:18,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 640 transitions, 10331 flow, removed 90 selfloop flow, removed 3 redundant places. [2024-06-28 00:00:18,509 INFO L231 Difference]: Finished difference. Result has 415 places, 626 transitions, 8932 flow [2024-06-28 00:00:18,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8773, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8932, PETRI_PLACES=415, PETRI_TRANSITIONS=626} [2024-06-28 00:00:18,510 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-28 00:00:18,510 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 626 transitions, 8932 flow [2024-06-28 00:00:18,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 00:00:18,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:00:18,510 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 00:00:18,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 00:00:18,511 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:00:18,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:00:18,512 INFO L85 PathProgramCache]: Analyzing trace with hash -396520450, now seen corresponding path program 6 times [2024-06-28 00:00:18,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:00:18,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356748607] [2024-06-28 00:00:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:00:18,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:00:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:00:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:00:19,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:00:19,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356748607] [2024-06-28 00:00:19,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356748607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:00:19,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:00:19,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:00:19,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29316511] [2024-06-28 00:00:19,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:00:19,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:00:19,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:00:19,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:00:19,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:00:19,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:00:19,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 626 transitions, 8932 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:00:19,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:00:19,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:00:19,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:00:22,517 INFO L124 PetriNetUnfolderBase]: 5674/9124 cut-off events. [2024-06-28 00:00:22,518 INFO L125 PetriNetUnfolderBase]: For 1504240/1504244 co-relation queries the response was YES. [2024-06-28 00:00:22,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88007 conditions, 9124 events. 5674/9124 cut-off events. For 1504240/1504244 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 60977 event pairs, 1565 based on Foata normal form. 5/9124 useless extension candidates. Maximal degree in co-relation 87804. Up to 8467 conditions per place. [2024-06-28 00:00:22,706 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 482 selfloop transitions, 133 changer transitions 0/646 dead transitions. [2024-06-28 00:00:22,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 646 transitions, 10698 flow [2024-06-28 00:00:22,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:00:22,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:00:22,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 00:00:22,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 00:00:22,707 INFO L175 Difference]: Start difference. First operand has 415 places, 626 transitions, 8932 flow. Second operand 8 states and 141 transitions. [2024-06-28 00:00:22,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 646 transitions, 10698 flow [2024-06-28 00:00:30,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 646 transitions, 10551 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 00:00:30,820 INFO L231 Difference]: Finished difference. Result has 417 places, 632 transitions, 9312 flow [2024-06-28 00:00:30,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8785, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9312, PETRI_PLACES=417, PETRI_TRANSITIONS=632} [2024-06-28 00:00:30,821 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-28 00:00:30,821 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 632 transitions, 9312 flow [2024-06-28 00:00:30,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:00:30,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:00:30,823 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 00:00:30,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 00:00:30,824 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:00:30,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:00:30,825 INFO L85 PathProgramCache]: Analyzing trace with hash -396520264, now seen corresponding path program 3 times [2024-06-28 00:00:30,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:00:30,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878545905] [2024-06-28 00:00:30,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:00:30,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:00:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:00:32,045 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 00:00:32,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:00:32,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878545905] [2024-06-28 00:00:32,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878545905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:00:32,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:00:32,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:00:32,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831442281] [2024-06-28 00:00:32,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:00:32,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:00:32,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:00:32,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:00:32,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:00:32,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:00:32,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 632 transitions, 9312 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:00:32,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:00:32,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:00:32,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:00:34,673 INFO L124 PetriNetUnfolderBase]: 5703/9186 cut-off events. [2024-06-28 00:00:34,673 INFO L125 PetriNetUnfolderBase]: For 1558930/1558934 co-relation queries the response was YES. [2024-06-28 00:00:34,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89756 conditions, 9186 events. 5703/9186 cut-off events. For 1558930/1558934 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 61874 event pairs, 1897 based on Foata normal form. 3/9184 useless extension candidates. Maximal degree in co-relation 89552. Up to 8503 conditions per place. [2024-06-28 00:00:34,893 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 528 selfloop transitions, 100 changer transitions 0/659 dead transitions. [2024-06-28 00:00:34,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 659 transitions, 11410 flow [2024-06-28 00:00:34,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:00:34,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:00:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 00:00:34,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 00:00:34,900 INFO L175 Difference]: Start difference. First operand has 417 places, 632 transitions, 9312 flow. Second operand 9 states and 153 transitions. [2024-06-28 00:00:34,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 659 transitions, 11410 flow [2024-06-28 00:00:43,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 659 transitions, 11174 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-28 00:00:43,865 INFO L231 Difference]: Finished difference. Result has 422 places, 641 transitions, 9555 flow [2024-06-28 00:00:43,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9076, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9555, PETRI_PLACES=422, PETRI_TRANSITIONS=641} [2024-06-28 00:00:43,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-28 00:00:43,867 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 641 transitions, 9555 flow [2024-06-28 00:00:43,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:00:43,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:00:43,868 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 00:00:43,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 00:00:43,870 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:00:43,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:00:43,870 INFO L85 PathProgramCache]: Analyzing trace with hash -692101606, now seen corresponding path program 1 times [2024-06-28 00:00:43,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:00:43,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133291710] [2024-06-28 00:00:43,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:00:43,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:00:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:00:44,934 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 00:00:44,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:00:44,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133291710] [2024-06-28 00:00:44,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133291710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:00:44,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:00:44,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:00:44,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224564267] [2024-06-28 00:00:44,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:00:44,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:00:44,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:00:44,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:00:44,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:00:45,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:00:45,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 641 transitions, 9555 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:00:45,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:00:45,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:00:45,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:00:47,880 INFO L124 PetriNetUnfolderBase]: 5711/9183 cut-off events. [2024-06-28 00:00:47,880 INFO L125 PetriNetUnfolderBase]: For 1601451/1601451 co-relation queries the response was YES. [2024-06-28 00:00:48,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91433 conditions, 9183 events. 5711/9183 cut-off events. For 1601451/1601451 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 61614 event pairs, 1677 based on Foata normal form. 2/9175 useless extension candidates. Maximal degree in co-relation 91227. Up to 8672 conditions per place. [2024-06-28 00:00:48,462 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 589 selfloop transitions, 45 changer transitions 0/665 dead transitions. [2024-06-28 00:00:48,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 665 transitions, 10982 flow [2024-06-28 00:00:48,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:00:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:00:48,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 00:00:48,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-28 00:00:48,464 INFO L175 Difference]: Start difference. First operand has 422 places, 641 transitions, 9555 flow. Second operand 9 states and 151 transitions. [2024-06-28 00:00:48,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 665 transitions, 10982 flow [2024-06-28 00:00:58,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 665 transitions, 10795 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-28 00:00:58,739 INFO L231 Difference]: Finished difference. Result has 427 places, 643 transitions, 9542 flow [2024-06-28 00:00:58,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9368, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9542, PETRI_PLACES=427, PETRI_TRANSITIONS=643} [2024-06-28 00:00:58,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-28 00:00:58,741 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 643 transitions, 9542 flow [2024-06-28 00:00:58,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:00:58,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:00:58,741 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 00:00:58,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 00:00:58,741 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:00:58,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:00:58,742 INFO L85 PathProgramCache]: Analyzing trace with hash 451501558, now seen corresponding path program 2 times [2024-06-28 00:00:58,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:00:58,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767647216] [2024-06-28 00:00:58,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:00:58,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:00:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:00:59,770 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 00:00:59,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:00:59,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767647216] [2024-06-28 00:00:59,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767647216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:00:59,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:00:59,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:00:59,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302902529] [2024-06-28 00:00:59,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:00:59,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:00:59,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:00:59,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:00:59,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:00:59,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:00:59,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 643 transitions, 9542 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:00:59,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:00:59,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:00:59,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:01:03,037 INFO L124 PetriNetUnfolderBase]: 5719/9196 cut-off events. [2024-06-28 00:01:03,038 INFO L125 PetriNetUnfolderBase]: For 1618924/1618924 co-relation queries the response was YES. [2024-06-28 00:01:03,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91511 conditions, 9196 events. 5719/9196 cut-off events. For 1618924/1618924 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 61624 event pairs, 1710 based on Foata normal form. 2/9190 useless extension candidates. Maximal degree in co-relation 91303. Up to 8737 conditions per place. [2024-06-28 00:01:03,332 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 588 selfloop transitions, 43 changer transitions 0/662 dead transitions. [2024-06-28 00:01:03,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 662 transitions, 10942 flow [2024-06-28 00:01:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:01:03,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:01:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-28 00:01:03,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-28 00:01:03,334 INFO L175 Difference]: Start difference. First operand has 427 places, 643 transitions, 9542 flow. Second operand 9 states and 147 transitions. [2024-06-28 00:01:03,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 662 transitions, 10942 flow [2024-06-28 00:01:11,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 662 transitions, 10776 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-28 00:01:11,208 INFO L231 Difference]: Finished difference. Result has 429 places, 645 transitions, 9548 flow [2024-06-28 00:01:11,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9376, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9548, PETRI_PLACES=429, PETRI_TRANSITIONS=645} [2024-06-28 00:01:11,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-28 00:01:11,209 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 645 transitions, 9548 flow [2024-06-28 00:01:11,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:01:11,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:01:11,210 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 00:01:11,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 00:01:11,210 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:01:11,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:01:11,210 INFO L85 PathProgramCache]: Analyzing trace with hash -396643396, now seen corresponding path program 3 times [2024-06-28 00:01:11,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:01:11,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197373372] [2024-06-28 00:01:11,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:01:11,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:01:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:01:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:01:12,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:01:12,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197373372] [2024-06-28 00:01:12,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197373372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:01:12,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:01:12,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:01:12,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771723353] [2024-06-28 00:01:12,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:01:12,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:01:12,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:01:12,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:01:12,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:01:12,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:01:12,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 645 transitions, 9548 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:01:12,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:01:12,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:01:12,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:01:15,569 INFO L124 PetriNetUnfolderBase]: 5727/9205 cut-off events. [2024-06-28 00:01:15,569 INFO L125 PetriNetUnfolderBase]: For 1646267/1646267 co-relation queries the response was YES. [2024-06-28 00:01:15,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91876 conditions, 9205 events. 5727/9205 cut-off events. For 1646267/1646267 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 61689 event pairs, 1646 based on Foata normal form. 2/9202 useless extension candidates. Maximal degree in co-relation 91667. Up to 8737 conditions per place. [2024-06-28 00:01:15,741 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 577 selfloop transitions, 53 changer transitions 0/661 dead transitions. [2024-06-28 00:01:15,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 661 transitions, 10940 flow [2024-06-28 00:01:15,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:01:15,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:01:15,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 00:01:15,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 00:01:15,742 INFO L175 Difference]: Start difference. First operand has 429 places, 645 transitions, 9548 flow. Second operand 8 states and 136 transitions. [2024-06-28 00:01:15,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 661 transitions, 10940 flow [2024-06-28 00:01:24,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 661 transitions, 10779 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-28 00:01:24,359 INFO L231 Difference]: Finished difference. Result has 430 places, 647 transitions, 9583 flow [2024-06-28 00:01:24,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9387, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9583, PETRI_PLACES=430, PETRI_TRANSITIONS=647} [2024-06-28 00:01:24,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-28 00:01:24,360 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 647 transitions, 9583 flow [2024-06-28 00:01:24,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:01:24,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:01:24,360 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 00:01:24,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 00:01:24,360 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:01:24,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:01:24,361 INFO L85 PathProgramCache]: Analyzing trace with hash -396274000, now seen corresponding path program 1 times [2024-06-28 00:01:24,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:01:24,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390383291] [2024-06-28 00:01:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:01:24,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:01:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:01:25,578 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 00:01:25,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:01:25,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390383291] [2024-06-28 00:01:25,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390383291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:01:25,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:01:25,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:01:25,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003513078] [2024-06-28 00:01:25,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:01:25,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:01:25,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:01:25,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:01:25,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:01:25,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-28 00:01:25,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 647 transitions, 9583 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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 00:01:25,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:01:25,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-28 00:01:25,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:01:29,325 INFO L124 PetriNetUnfolderBase]: 5588/8977 cut-off events. [2024-06-28 00:01:29,326 INFO L125 PetriNetUnfolderBase]: For 1662774/1662806 co-relation queries the response was YES. [2024-06-28 00:01:29,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90643 conditions, 8977 events. 5588/8977 cut-off events. For 1662774/1662806 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 60039 event pairs, 1619 based on Foata normal form. 10/8919 useless extension candidates. Maximal degree in co-relation 90433. Up to 8409 conditions per place. [2024-06-28 00:01:29,520 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 512 selfloop transitions, 94 changer transitions 0/667 dead transitions. [2024-06-28 00:01:29,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 667 transitions, 11193 flow [2024-06-28 00:01:29,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:01:29,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:01:29,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 00:01:29,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 00:01:29,523 INFO L175 Difference]: Start difference. First operand has 430 places, 647 transitions, 9583 flow. Second operand 8 states and 144 transitions. [2024-06-28 00:01:29,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 667 transitions, 11193 flow [2024-06-28 00:01:39,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 667 transitions, 10998 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-28 00:01:39,317 INFO L231 Difference]: Finished difference. Result has 431 places, 650 transitions, 9669 flow [2024-06-28 00:01:39,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9388, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9669, PETRI_PLACES=431, PETRI_TRANSITIONS=650} [2024-06-28 00:01:39,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-28 00:01:39,318 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 650 transitions, 9669 flow [2024-06-28 00:01:39,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 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 00:01:39,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:01:39,318 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 00:01:39,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 00:01:39,318 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:01:39,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:01:39,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2146003976, now seen corresponding path program 7 times [2024-06-28 00:01:39,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:01:39,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624823007] [2024-06-28 00:01:39,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:01:39,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:01:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:01:40,414 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 00:01:40,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:01:40,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624823007] [2024-06-28 00:01:40,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624823007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:01:40,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:01:40,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:01:40,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145892362] [2024-06-28 00:01:40,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:01:40,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:01:40,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:01:40,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:01:40,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:01:40,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:01:40,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 650 transitions, 9669 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:01:40,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:01:40,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:01:40,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:01:44,058 INFO L124 PetriNetUnfolderBase]: 5745/9232 cut-off events. [2024-06-28 00:01:44,059 INFO L125 PetriNetUnfolderBase]: For 1679490/1679490 co-relation queries the response was YES. [2024-06-28 00:01:44,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93079 conditions, 9232 events. 5745/9232 cut-off events. For 1679490/1679490 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 61737 event pairs, 1547 based on Foata normal form. 1/9228 useless extension candidates. Maximal degree in co-relation 92869. Up to 8652 conditions per place. [2024-06-28 00:01:44,331 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 545 selfloop transitions, 94 changer transitions 0/670 dead transitions. [2024-06-28 00:01:44,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 670 transitions, 11139 flow [2024-06-28 00:01:44,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:01:44,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:01:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 00:01:44,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 00:01:44,333 INFO L175 Difference]: Start difference. First operand has 431 places, 650 transitions, 9669 flow. Second operand 8 states and 141 transitions. [2024-06-28 00:01:44,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 670 transitions, 11139 flow [2024-06-28 00:01:56,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 670 transitions, 10758 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-28 00:01:56,024 INFO L231 Difference]: Finished difference. Result has 430 places, 653 transitions, 9605 flow [2024-06-28 00:01:56,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9288, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9605, PETRI_PLACES=430, PETRI_TRANSITIONS=653} [2024-06-28 00:01:56,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-28 00:01:56,024 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 653 transitions, 9605 flow [2024-06-28 00:01:56,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:01:56,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:01:56,025 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 00:01:56,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 00:01:56,025 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:01:56,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:01:56,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2145894422, now seen corresponding path program 4 times [2024-06-28 00:01:56,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:01:56,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5028697] [2024-06-28 00:01:56,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:01:56,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:01:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:01:57,001 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 00:01:57,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:01:57,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5028697] [2024-06-28 00:01:57,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5028697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:01:57,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:01:57,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:01:57,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23689836] [2024-06-28 00:01:57,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:01:57,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:01:57,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:01:57,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:01:57,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:01:57,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:01:57,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 653 transitions, 9605 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:01:57,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:01:57,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:01:57,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:00,194 INFO L124 PetriNetUnfolderBase]: 5749/9246 cut-off events. [2024-06-28 00:02:00,195 INFO L125 PetriNetUnfolderBase]: For 1704788/1704792 co-relation queries the response was YES. [2024-06-28 00:02:00,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93239 conditions, 9246 events. 5749/9246 cut-off events. For 1704788/1704792 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 62193 event pairs, 1880 based on Foata normal form. 5/9246 useless extension candidates. Maximal degree in co-relation 93028. Up to 8654 conditions per place. [2024-06-28 00:02:00,368 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 576 selfloop transitions, 75 changer transitions 0/682 dead transitions. [2024-06-28 00:02:00,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 682 transitions, 11196 flow [2024-06-28 00:02:00,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:02:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:02:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 00:02:00,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-28 00:02:00,369 INFO L175 Difference]: Start difference. First operand has 430 places, 653 transitions, 9605 flow. Second operand 9 states and 151 transitions. [2024-06-28 00:02:00,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 682 transitions, 11196 flow [2024-06-28 00:02:09,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 682 transitions, 10909 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-28 00:02:09,731 INFO L231 Difference]: Finished difference. Result has 434 places, 661 transitions, 9643 flow [2024-06-28 00:02:09,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9318, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9643, PETRI_PLACES=434, PETRI_TRANSITIONS=661} [2024-06-28 00:02:09,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-28 00:02:09,732 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 661 transitions, 9643 flow [2024-06-28 00:02:09,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:02:09,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:09,732 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 00:02:09,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-28 00:02:09,732 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:09,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:09,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1921171724, now seen corresponding path program 5 times [2024-06-28 00:02:09,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:09,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102549929] [2024-06-28 00:02:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:09,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:10,664 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 00:02:10,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:10,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102549929] [2024-06-28 00:02:10,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102549929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:10,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:10,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:02:10,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668316243] [2024-06-28 00:02:10,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:10,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:02:10,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:10,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:02:10,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:02:10,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:02:10,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 661 transitions, 9643 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:02:10,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:10,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:02:10,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:13,949 INFO L124 PetriNetUnfolderBase]: 5754/9243 cut-off events. [2024-06-28 00:02:13,950 INFO L125 PetriNetUnfolderBase]: For 1737902/1737906 co-relation queries the response was YES. [2024-06-28 00:02:14,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94535 conditions, 9243 events. 5754/9243 cut-off events. For 1737902/1737906 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 62012 event pairs, 1893 based on Foata normal form. 5/9243 useless extension candidates. Maximal degree in co-relation 94322. Up to 8661 conditions per place. [2024-06-28 00:02:14,119 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 573 selfloop transitions, 88 changer transitions 0/692 dead transitions. [2024-06-28 00:02:14,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 692 transitions, 11306 flow [2024-06-28 00:02:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:02:14,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:02:14,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 00:02:14,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 00:02:14,121 INFO L175 Difference]: Start difference. First operand has 434 places, 661 transitions, 9643 flow. Second operand 8 states and 140 transitions. [2024-06-28 00:02:14,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 692 transitions, 11306 flow [2024-06-28 00:02:23,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 692 transitions, 11092 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-28 00:02:23,609 INFO L231 Difference]: Finished difference. Result has 437 places, 672 transitions, 9841 flow [2024-06-28 00:02:23,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9437, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9841, PETRI_PLACES=437, PETRI_TRANSITIONS=672} [2024-06-28 00:02:23,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-28 00:02:23,610 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 672 transitions, 9841 flow [2024-06-28 00:02:23,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:02:23,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:23,610 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 00:02:23,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-28 00:02:23,611 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:23,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:23,611 INFO L85 PathProgramCache]: Analyzing trace with hash 2146014578, now seen corresponding path program 4 times [2024-06-28 00:02:23,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:23,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732161311] [2024-06-28 00:02:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:23,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:24,607 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 00:02:24,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:24,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732161311] [2024-06-28 00:02:24,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732161311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:24,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:24,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:02:24,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372354640] [2024-06-28 00:02:24,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:24,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:02:24,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:24,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:02:24,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:02:24,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 00:02:24,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 672 transitions, 9841 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 00:02:24,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:24,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 00:02:24,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:27,883 INFO L124 PetriNetUnfolderBase]: 5826/9320 cut-off events. [2024-06-28 00:02:27,883 INFO L125 PetriNetUnfolderBase]: For 1755782/1755786 co-relation queries the response was YES. [2024-06-28 00:02:28,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95485 conditions, 9320 events. 5826/9320 cut-off events. For 1755782/1755786 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 62264 event pairs, 1927 based on Foata normal form. 5/9324 useless extension candidates. Maximal degree in co-relation 95271. Up to 8993 conditions per place. [2024-06-28 00:02:28,057 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 638 selfloop transitions, 46 changer transitions 0/688 dead transitions. [2024-06-28 00:02:28,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 688 transitions, 11299 flow [2024-06-28 00:02:28,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:02:28,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:02:28,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-28 00:02:28,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-28 00:02:28,059 INFO L175 Difference]: Start difference. First operand has 437 places, 672 transitions, 9841 flow. Second operand 9 states and 136 transitions. [2024-06-28 00:02:28,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 688 transitions, 11299 flow [2024-06-28 00:02:40,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 688 transitions, 11104 flow, removed 89 selfloop flow, removed 2 redundant places. [2024-06-28 00:02:40,020 INFO L231 Difference]: Finished difference. Result has 444 places, 673 transitions, 9767 flow [2024-06-28 00:02:40,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9656, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9767, PETRI_PLACES=444, PETRI_TRANSITIONS=673} [2024-06-28 00:02:40,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-28 00:02:40,021 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 673 transitions, 9767 flow [2024-06-28 00:02:40,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 00:02:40,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:40,021 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 00:02:40,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-28 00:02:40,022 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:40,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:40,022 INFO L85 PathProgramCache]: Analyzing trace with hash 2146014392, now seen corresponding path program 6 times [2024-06-28 00:02:40,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:40,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193184591] [2024-06-28 00:02:40,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:40,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:41,152 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 00:02:41,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:41,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193184591] [2024-06-28 00:02:41,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193184591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:41,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:41,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:02:41,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696627507] [2024-06-28 00:02:41,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:41,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:02:41,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:41,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:02:41,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:02:41,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:02:41,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 673 transitions, 9767 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:02:41,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:41,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:02:41,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:44,641 INFO L124 PetriNetUnfolderBase]: 5756/9257 cut-off events. [2024-06-28 00:02:44,641 INFO L125 PetriNetUnfolderBase]: For 1773096/1773100 co-relation queries the response was YES. [2024-06-28 00:02:44,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94181 conditions, 9257 events. 5756/9257 cut-off events. For 1773096/1773100 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 62207 event pairs, 1881 based on Foata normal form. 5/9257 useless extension candidates. Maximal degree in co-relation 93964. Up to 8639 conditions per place. [2024-06-28 00:02:44,831 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 572 selfloop transitions, 93 changer transitions 0/696 dead transitions. [2024-06-28 00:02:44,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 696 transitions, 11621 flow [2024-06-28 00:02:44,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:02:44,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:02:44,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 00:02:44,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-28 00:02:44,833 INFO L175 Difference]: Start difference. First operand has 444 places, 673 transitions, 9767 flow. Second operand 9 states and 151 transitions. [2024-06-28 00:02:44,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 696 transitions, 11621 flow [2024-06-28 00:02:53,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 696 transitions, 11529 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 00:02:53,995 INFO L231 Difference]: Finished difference. Result has 448 places, 679 transitions, 10085 flow [2024-06-28 00:02:53,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9675, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10085, PETRI_PLACES=448, PETRI_TRANSITIONS=679} [2024-06-28 00:02:53,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-28 00:02:53,997 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 679 transitions, 10085 flow [2024-06-28 00:02:53,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:02:53,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:02:53,997 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 00:02:53,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-28 00:02:53,997 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:02:53,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:02:53,998 INFO L85 PathProgramCache]: Analyzing trace with hash 512612592, now seen corresponding path program 7 times [2024-06-28 00:02:53,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:02:53,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020306288] [2024-06-28 00:02:53,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:02:53,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:02:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:02:55,077 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 00:02:55,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:02:55,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020306288] [2024-06-28 00:02:55,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020306288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:02:55,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:02:55,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:02:55,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933388767] [2024-06-28 00:02:55,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:02:55,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:02:55,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:02:55,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:02:55,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:02:55,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:02:55,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 679 transitions, 10085 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:02:55,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:02:55,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:02:55,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:02:58,367 INFO L124 PetriNetUnfolderBase]: 5769/9259 cut-off events. [2024-06-28 00:02:58,367 INFO L125 PetriNetUnfolderBase]: For 1813269/1813273 co-relation queries the response was YES. [2024-06-28 00:02:58,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95484 conditions, 9259 events. 5769/9259 cut-off events. For 1813269/1813273 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 62066 event pairs, 1904 based on Foata normal form. 5/9259 useless extension candidates. Maximal degree in co-relation 95265. Up to 8661 conditions per place. [2024-06-28 00:02:58,536 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 570 selfloop transitions, 102 changer transitions 0/703 dead transitions. [2024-06-28 00:02:58,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 703 transitions, 11989 flow [2024-06-28 00:02:58,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:02:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:02:58,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 00:02:58,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-28 00:02:58,538 INFO L175 Difference]: Start difference. First operand has 448 places, 679 transitions, 10085 flow. Second operand 9 states and 148 transitions. [2024-06-28 00:02:58,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 703 transitions, 11989 flow [2024-06-28 00:03:09,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 703 transitions, 11810 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-28 00:03:09,456 INFO L231 Difference]: Finished difference. Result has 452 places, 685 transitions, 10322 flow [2024-06-28 00:03:09,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9906, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10322, PETRI_PLACES=452, PETRI_TRANSITIONS=685} [2024-06-28 00:03:09,457 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 409 predicate places. [2024-06-28 00:03:09,457 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 685 transitions, 10322 flow [2024-06-28 00:03:09,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:03:09,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:03:09,457 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 00:03:09,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-28 00:03:09,457 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:03:09,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:03:09,458 INFO L85 PathProgramCache]: Analyzing trace with hash 2146014206, now seen corresponding path program 8 times [2024-06-28 00:03:09,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:03:09,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164240509] [2024-06-28 00:03:09,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:03:09,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:03:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:03:10,634 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 00:03:10,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:03:10,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164240509] [2024-06-28 00:03:10,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164240509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:03:10,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:03:10,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:03:10,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498916178] [2024-06-28 00:03:10,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:03:10,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:03:10,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:03:10,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:03:10,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:03:10,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 00:03:10,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 685 transitions, 10322 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 00:03:10,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:03:10,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 00:03:10,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:03:13,861 INFO L124 PetriNetUnfolderBase]: 5766/9260 cut-off events. [2024-06-28 00:03:13,861 INFO L125 PetriNetUnfolderBase]: For 1836441/1836441 co-relation queries the response was YES. [2024-06-28 00:03:13,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96419 conditions, 9260 events. 5766/9260 cut-off events. For 1836441/1836441 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 61826 event pairs, 1505 based on Foata normal form. 1/9256 useless extension candidates. Maximal degree in co-relation 96198. Up to 8672 conditions per place. [2024-06-28 00:03:14,033 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 568 selfloop transitions, 101 changer transitions 0/700 dead transitions. [2024-06-28 00:03:14,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 700 transitions, 11730 flow [2024-06-28 00:03:14,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:03:14,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:03:14,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 00:03:14,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-28 00:03:14,034 INFO L175 Difference]: Start difference. First operand has 452 places, 685 transitions, 10322 flow. Second operand 9 states and 149 transitions. [2024-06-28 00:03:14,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 700 transitions, 11730 flow