./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_power.oepc.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/safe012_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe012_power.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe012_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 19:32:26,612 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 19:32:26,680 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 19:32:26,687 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 19:32:26,688 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 19:32:26,710 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 19:32:26,713 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 19:32:26,713 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 19:32:26,714 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 19:32:26,717 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 19:32:26,717 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 19:32:26,717 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 19:32:26,718 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 19:32:26,719 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 19:32:26,719 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 19:32:26,719 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 19:32:26,719 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 19:32:26,720 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 19:32:26,720 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 19:32:26,720 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 19:32:26,720 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 19:32:26,721 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 19:32:26,721 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 19:32:26,721 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 19:32:26,721 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 19:32:26,721 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 19:32:26,721 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 19:32:26,722 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 19:32:26,722 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 19:32:26,722 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 19:32:26,723 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 19:32:26,723 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 19:32:26,723 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:32:26,724 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 19:32:26,724 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 19:32:26,724 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 19:32:26,724 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 19:32:26,724 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 19:32:26,724 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 19:32:26,725 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 19:32:26,725 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 19:32:26,725 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 19:32:26,725 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 19:32:26,725 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 19:32:26,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 19:32:26,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 19:32:26,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 19:32:26,993 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 19:32:26,995 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 19:32:26,996 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe012_power.oepc.yml/witness.yml [2024-06-21 19:32:27,092 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 19:32:27,093 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 19:32:27,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_power.oepc.i [2024-06-21 19:32:28,078 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 19:32:28,284 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 19:32:28,285 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_power.oepc.i [2024-06-21 19:32:28,302 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23c8557a9/e48320a1699848cf8385395758d92e85/FLAG5400abbca [2024-06-21 19:32:28,312 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23c8557a9/e48320a1699848cf8385395758d92e85 [2024-06-21 19:32:28,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 19:32:28,313 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 19:32:28,316 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 19:32:28,316 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 19:32:28,320 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 19:32:28,320 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:32:27" (1/2) ... [2024-06-21 19:32:28,321 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f59cf6f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:32:28, skipping insertion in model container [2024-06-21 19:32:28,321 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:32:27" (1/2) ... [2024-06-21 19:32:28,322 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3793ca75 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:32:28, skipping insertion in model container [2024-06-21 19:32:28,324 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:32:28" (2/2) ... [2024-06-21 19:32:28,324 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f59cf6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:32:28, skipping insertion in model container [2024-06-21 19:32:28,325 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:32:28" (2/2) ... [2024-06-21 19:32:28,325 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 19:32:28,374 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 19:32:28,399 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff1_used >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )x) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )y) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )z$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice2) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )z$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$read_delayed >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff1 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX$read_delayed) - (long long )z$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice0) - (long long )z$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice1) - (long long )z$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice2) - (long long )z$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )z$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice0 >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice2 >= 0LL) && (long long )z - (long long )z$mem_tmp >= 0LL) [2024-06-21 19:32:28,399 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff1_used >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )x) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )y) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )z$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice2) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )z$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$read_delayed >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff1 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX$read_delayed) - (long long )z$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice0) - (long long )z$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice1) - (long long )z$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice2) - (long long )z$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )z$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice0 >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice2 >= 0LL) && (long long )z - (long long )z$mem_tmp >= 0LL) [2024-06-21 19:32:28,400 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )z$mem_tmp) + (long long )z$w_buff1_used >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p0_EBX) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )x) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )y) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )z$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice0) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice1) - (long long )z$mem_tmp >= 0LL) && (1LL + (long long )weak$$choice2) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$mem_tmp) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff0_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd0) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd1) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd2) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$r_buff1_thd3) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff0_used) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p0_EAX$w_buff1_used) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )z$flush_delayed) - (long long )z$mem_tmp >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$read_delayed >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff0 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff1 >= 0LL) && (1LL - (long long )z$mem_tmp) - (long long )z$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p0_EAX$read_delayed) - (long long )z$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice0) - (long long )z$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice1) - (long long )z$mem_tmp >= 0LL) && (2LL - (long long )weak$$choice2) - (long long )z$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )z$mem_tmp >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice0 >= 0LL) && (long long )__unbuffered_p0_EAX$read_delayed - (long long )weak$$choice2 >= 0LL) && (long long )z - (long long )z$mem_tmp >= 0LL) [2024-06-21 19:32:28,400 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 19:32:28,400 INFO L106 edCorrectnessWitness]: ghost_update [L838-L838] multithreaded = 1; [2024-06-21 19:32:28,437 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 19:32:28,719 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:32:28,727 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 19:32:28,899 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:32:28,941 INFO L206 MainTranslator]: Completed translation [2024-06-21 19:32:28,942 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:32:28 WrapperNode [2024-06-21 19:32:28,942 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 19:32:28,943 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 19:32:28,943 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 19:32:28,943 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 19:32:28,948 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:32:28" (1/1) ... [2024-06-21 19:32:28,974 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:32:28" (1/1) ... [2024-06-21 19:32:29,013 INFO L138 Inliner]: procedures = 175, calls = 61, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 146 [2024-06-21 19:32:29,013 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 19:32:29,014 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 19:32:29,014 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 19:32:29,014 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 19:32:29,022 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:32:28" (1/1) ... [2024-06-21 19:32:29,022 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:32:28" (1/1) ... [2024-06-21 19:32:29,026 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:32:28" (1/1) ... [2024-06-21 19:32:29,041 INFO L175 MemorySlicer]: Split 20 memory accesses to 2 slices as follows [2, 18]. 90 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-21 19:32:29,042 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:32:28" (1/1) ... [2024-06-21 19:32:29,042 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:32:28" (1/1) ... [2024-06-21 19:32:29,051 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:32:28" (1/1) ... [2024-06-21 19:32:29,053 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:32:28" (1/1) ... [2024-06-21 19:32:29,055 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:32:28" (1/1) ... [2024-06-21 19:32:29,057 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:32:28" (1/1) ... [2024-06-21 19:32:29,061 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 19:32:29,062 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 19:32:29,062 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 19:32:29,062 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 19:32:29,063 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:32:28" (1/1) ... [2024-06-21 19:32:29,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:32:29,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 19:32:29,083 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) [2024-06-21 19:32:29,134 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 [2024-06-21 19:32:29,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 19:32:29,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 19:32:29,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 19:32:29,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 19:32:29,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 19:32:29,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 19:32:29,158 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 19:32:29,158 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 19:32:29,158 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 19:32:29,158 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 19:32:29,159 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 19:32:29,159 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 19:32:29,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 19:32:29,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 19:32:29,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 19:32:29,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 19:32:29,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 19:32:29,161 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 19:32:29,297 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 19:32:29,299 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 19:32:29,813 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 19:32:29,813 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 19:32:30,073 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 19:32:30,073 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 19:32:30,074 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:32:30 BoogieIcfgContainer [2024-06-21 19:32:30,074 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 19:32:30,076 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 19:32:30,076 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 19:32:30,079 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 19:32:30,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:32:27" (1/4) ... [2024-06-21 19:32:30,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37477510 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:32:30, skipping insertion in model container [2024-06-21 19:32:30,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 07:32:28" (2/4) ... [2024-06-21 19:32:30,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37477510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:32:30, skipping insertion in model container [2024-06-21 19:32:30,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:32:28" (3/4) ... [2024-06-21 19:32:30,082 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37477510 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:32:30, skipping insertion in model container [2024-06-21 19:32:30,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:32:30" (4/4) ... [2024-06-21 19:32:30,083 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_power.oepc.i [2024-06-21 19:32:30,097 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 19:32:30,098 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 19:32:30,098 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 19:32:30,165 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 19:32:30,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 19:32:30,228 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 19:32:30,228 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:32:30,231 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 59 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. [2024-06-21 19:32:30,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 19:32:30,234 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 19:32:30,246 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 19:32:30,255 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;@70a0ede3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 19:32:30,255 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 19:32:30,260 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 19:32:30,261 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 19:32:30,261 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:32:30,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:30,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 19:32:30,262 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)] === [2024-06-21 19:32:30,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:30,266 INFO L85 PathProgramCache]: Analyzing trace with hash 604932744, now seen corresponding path program 1 times [2024-06-21 19:32:30,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:30,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605656065] [2024-06-21 19:32:30,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:30,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:32:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:32:32,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:32:32,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605656065] [2024-06-21 19:32:32,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605656065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:32:32,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:32:32,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 19:32:32,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112969596] [2024-06-21 19:32:32,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:32:32,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 19:32:32,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:32:32,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 19:32:32,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 19:32:32,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 19:32:32,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:32,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:32:32,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 19:32:32,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:32:32,683 INFO L124 PetriNetUnfolderBase]: 770/1239 cut-off events. [2024-06-21 19:32:32,684 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-21 19:32:32,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2482 conditions, 1239 events. 770/1239 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5925 event pairs, 479 based on Foata normal form. 1/1208 useless extension candidates. Maximal degree in co-relation 2470. Up to 1178 conditions per place. [2024-06-21 19:32:32,696 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 19:32:32,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 179 flow [2024-06-21 19:32:32,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 19:32:32,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 19:32:32,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-21 19:32:32,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-21 19:32:32,707 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 73 transitions. [2024-06-21 19:32:32,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 179 flow [2024-06-21 19:32:32,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 19:32:32,712 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 19:32:32,713 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} [2024-06-21 19:32:32,716 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 19:32:32,716 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 19:32:32,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:32,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:32,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:32:32,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 19:32:32,717 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)] === [2024-06-21 19:32:32,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:32,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1519836103, now seen corresponding path program 1 times [2024-06-21 19:32:32,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:32,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411608000] [2024-06-21 19:32:32,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:32,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:32:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:32:35,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:32:35,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411608000] [2024-06-21 19:32:35,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411608000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:32:35,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:32:35,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 19:32:35,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694102943] [2024-06-21 19:32:35,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:32:35,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 19:32:35,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:32:35,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 19:32:35,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 19:32:35,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 19:32:35,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:35,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:32:35,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 19:32:35,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:32:36,087 INFO L124 PetriNetUnfolderBase]: 764/1231 cut-off events. [2024-06-21 19:32:36,088 INFO L125 PetriNetUnfolderBase]: For 253/261 co-relation queries the response was YES. [2024-06-21 19:32:36,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2837 conditions, 1231 events. 764/1231 cut-off events. For 253/261 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5891 event pairs, 369 based on Foata normal form. 6/1233 useless extension candidates. Maximal degree in co-relation 2825. Up to 1150 conditions per place. [2024-06-21 19:32:36,094 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-21 19:32:36,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 254 flow [2024-06-21 19:32:36,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:32:36,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:32:36,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-21 19:32:36,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 19:32:36,096 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 96 transitions. [2024-06-21 19:32:36,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 254 flow [2024-06-21 19:32:36,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 19:32:36,097 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 19:32:36,098 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} [2024-06-21 19:32:36,098 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 19:32:36,098 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 19:32:36,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:36,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:36,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:32:36,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 19:32:36,099 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)] === [2024-06-21 19:32:36,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:36,100 INFO L85 PathProgramCache]: Analyzing trace with hash -106150193, now seen corresponding path program 1 times [2024-06-21 19:32:36,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:36,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400150452] [2024-06-21 19:32:36,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:36,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:32:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:32:39,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:32:39,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400150452] [2024-06-21 19:32:39,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400150452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:32:39,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:32:39,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:32:39,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446005486] [2024-06-21 19:32:39,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:32:39,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:32:39,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:32:39,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:32:39,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:32:39,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:32:39,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 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) [2024-06-21 19:32:39,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:32:39,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:32:39,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:32:40,385 INFO L124 PetriNetUnfolderBase]: 969/1526 cut-off events. [2024-06-21 19:32:40,385 INFO L125 PetriNetUnfolderBase]: For 847/863 co-relation queries the response was YES. [2024-06-21 19:32:40,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3915 conditions, 1526 events. 969/1526 cut-off events. For 847/863 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7189 event pairs, 305 based on Foata normal form. 12/1531 useless extension candidates. Maximal degree in co-relation 3901. Up to 1394 conditions per place. [2024-06-21 19:32:40,395 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-21 19:32:40,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 378 flow [2024-06-21 19:32:40,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:32:40,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:32:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-21 19:32:40,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-21 19:32:40,401 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 132 transitions. [2024-06-21 19:32:40,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 378 flow [2024-06-21 19:32:40,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 358 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 19:32:40,404 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-21 19:32:40,404 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} [2024-06-21 19:32:40,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-21 19:32:40,405 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-21 19:32:40,406 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) [2024-06-21 19:32:40,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:40,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:32:40,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 19:32:40,406 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)] === [2024-06-21 19:32:40,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:40,407 INFO L85 PathProgramCache]: Analyzing trace with hash -231763927, now seen corresponding path program 1 times [2024-06-21 19:32:40,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:40,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227212703] [2024-06-21 19:32:40,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:40,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:32:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:32:42,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:32:42,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227212703] [2024-06-21 19:32:42,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227212703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:32:42,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:32:42,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:32:42,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151538459] [2024-06-21 19:32:42,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:32:42,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:32:42,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:32:42,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:32:42,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:32:42,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:32:42,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:42,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:32:42,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:32:42,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:32:43,123 INFO L124 PetriNetUnfolderBase]: 959/1517 cut-off events. [2024-06-21 19:32:43,123 INFO L125 PetriNetUnfolderBase]: For 1628/1647 co-relation queries the response was YES. [2024-06-21 19:32:43,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4279 conditions, 1517 events. 959/1517 cut-off events. For 1628/1647 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7134 event pairs, 368 based on Foata normal form. 14/1527 useless extension candidates. Maximal degree in co-relation 4262. Up to 1409 conditions per place. [2024-06-21 19:32:43,131 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 45 selfloop transitions, 12 changer transitions 0/63 dead transitions. [2024-06-21 19:32:43,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 63 transitions, 361 flow [2024-06-21 19:32:43,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:32:43,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:32:43,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-21 19:32:43,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-21 19:32:43,133 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 97 transitions. [2024-06-21 19:32:43,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 63 transitions, 361 flow [2024-06-21 19:32:43,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 63 transitions, 332 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 19:32:43,136 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 221 flow [2024-06-21 19:32:43,136 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=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-06-21 19:32:43,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2024-06-21 19:32:43,137 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 221 flow [2024-06-21 19:32:43,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:43,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:43,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:32:43,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 19:32:43,138 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)] === [2024-06-21 19:32:43,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:43,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1405254072, now seen corresponding path program 1 times [2024-06-21 19:32:43,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:43,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535436191] [2024-06-21 19:32:43,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:43,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:32:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:32:45,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:32:45,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535436191] [2024-06-21 19:32:45,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535436191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:32:45,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:32:45,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:32:45,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388989248] [2024-06-21 19:32:45,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:32:45,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:32:45,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:32:45,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:32:45,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:32:45,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:32:45,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 221 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 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) [2024-06-21 19:32:45,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:32:45,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:32:45,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:32:46,697 INFO L124 PetriNetUnfolderBase]: 1099/1716 cut-off events. [2024-06-21 19:32:46,698 INFO L125 PetriNetUnfolderBase]: For 2431/2433 co-relation queries the response was YES. [2024-06-21 19:32:46,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5185 conditions, 1716 events. 1099/1716 cut-off events. For 2431/2433 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8103 event pairs, 411 based on Foata normal form. 6/1719 useless extension candidates. Maximal degree in co-relation 5164. Up to 1585 conditions per place. [2024-06-21 19:32:46,709 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 61 selfloop transitions, 14 changer transitions 0/80 dead transitions. [2024-06-21 19:32:46,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 80 transitions, 485 flow [2024-06-21 19:32:46,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:32:46,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:32:46,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 19:32:46,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 19:32:46,714 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 221 flow. Second operand 6 states and 110 transitions. [2024-06-21 19:32:46,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 80 transitions, 485 flow [2024-06-21 19:32:46,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 80 transitions, 466 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-21 19:32:46,723 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 314 flow [2024-06-21 19:32:46,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=314, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-06-21 19:32:46,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-21 19:32:46,725 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 314 flow [2024-06-21 19:32:46,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 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) [2024-06-21 19:32:46,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:46,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:32:46,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 19:32:46,726 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)] === [2024-06-21 19:32:46,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:46,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1856488771, now seen corresponding path program 1 times [2024-06-21 19:32:46,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:46,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094713467] [2024-06-21 19:32:46,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:46,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:32:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:32:49,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:32:49,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094713467] [2024-06-21 19:32:49,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094713467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:32:49,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:32:49,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:32:49,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480935656] [2024-06-21 19:32:49,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:32:49,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:32:49,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:32:49,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:32:49,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:32:49,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:32:49,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 314 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:49,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:32:49,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:32:49,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:32:50,821 INFO L124 PetriNetUnfolderBase]: 1121/1780 cut-off events. [2024-06-21 19:32:50,822 INFO L125 PetriNetUnfolderBase]: For 3929/3981 co-relation queries the response was YES. [2024-06-21 19:32:50,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5920 conditions, 1780 events. 1121/1780 cut-off events. For 3929/3981 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8721 event pairs, 337 based on Foata normal form. 22/1788 useless extension candidates. Maximal degree in co-relation 5893. Up to 1574 conditions per place. [2024-06-21 19:32:50,831 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 63 selfloop transitions, 30 changer transitions 0/102 dead transitions. [2024-06-21 19:32:50,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 102 transitions, 663 flow [2024-06-21 19:32:50,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:32:50,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:32:50,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 19:32:50,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 19:32:50,833 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 314 flow. Second operand 9 states and 160 transitions. [2024-06-21 19:32:50,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 102 transitions, 663 flow [2024-06-21 19:32:50,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 102 transitions, 658 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-21 19:32:50,838 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 485 flow [2024-06-21 19:32:50,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=485, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2024-06-21 19:32:50,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-21 19:32:50,838 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 485 flow [2024-06-21 19:32:50,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:50,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:50,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:32:50,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 19:32:50,839 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)] === [2024-06-21 19:32:50,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:50,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1895932861, now seen corresponding path program 2 times [2024-06-21 19:32:50,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:50,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484747931] [2024-06-21 19:32:50,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:50,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:32:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:32:53,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:32:53,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484747931] [2024-06-21 19:32:53,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484747931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:32:53,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:32:53,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:32:53,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699912153] [2024-06-21 19:32:53,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:32:53,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:32:53,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:32:53,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:32:53,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:32:53,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:32:53,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 485 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:53,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:32:53,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:32:53,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:32:55,097 INFO L124 PetriNetUnfolderBase]: 1195/1888 cut-off events. [2024-06-21 19:32:55,098 INFO L125 PetriNetUnfolderBase]: For 6841/6885 co-relation queries the response was YES. [2024-06-21 19:32:55,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7350 conditions, 1888 events. 1195/1888 cut-off events. For 6841/6885 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9258 event pairs, 354 based on Foata normal form. 14/1888 useless extension candidates. Maximal degree in co-relation 7317. Up to 1560 conditions per place. [2024-06-21 19:32:55,110 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 63 selfloop transitions, 48 changer transitions 0/120 dead transitions. [2024-06-21 19:32:55,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 120 transitions, 944 flow [2024-06-21 19:32:55,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:32:55,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:32:55,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 19:32:55,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 19:32:55,112 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 485 flow. Second operand 9 states and 168 transitions. [2024-06-21 19:32:55,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 120 transitions, 944 flow [2024-06-21 19:32:55,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 120 transitions, 930 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-21 19:32:55,119 INFO L231 Difference]: Finished difference. Result has 81 places, 90 transitions, 715 flow [2024-06-21 19:32:55,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=715, PETRI_PLACES=81, PETRI_TRANSITIONS=90} [2024-06-21 19:32:55,120 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-21 19:32:55,120 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 90 transitions, 715 flow [2024-06-21 19:32:55,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:55,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:55,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:32:55,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 19:32:55,121 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)] === [2024-06-21 19:32:55,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:55,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1404161721, now seen corresponding path program 3 times [2024-06-21 19:32:55,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:55,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970726288] [2024-06-21 19:32:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:55,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:32:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:32:57,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:32:57,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970726288] [2024-06-21 19:32:57,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970726288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:32:57,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:32:57,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:32:57,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425250208] [2024-06-21 19:32:57,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:32:57,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:32:57,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:32:57,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:32:57,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:32:57,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:32:57,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 90 transitions, 715 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:57,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:32:57,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:32:57,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:32:58,155 INFO L124 PetriNetUnfolderBase]: 1179/1862 cut-off events. [2024-06-21 19:32:58,155 INFO L125 PetriNetUnfolderBase]: For 10956/11012 co-relation queries the response was YES. [2024-06-21 19:32:58,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8249 conditions, 1862 events. 1179/1862 cut-off events. For 10956/11012 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9120 event pairs, 354 based on Foata normal form. 29/1877 useless extension candidates. Maximal degree in co-relation 8210. Up to 1603 conditions per place. [2024-06-21 19:32:58,168 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 66 selfloop transitions, 41 changer transitions 0/116 dead transitions. [2024-06-21 19:32:58,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 116 transitions, 1058 flow [2024-06-21 19:32:58,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:32:58,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:32:58,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 19:32:58,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-21 19:32:58,171 INFO L175 Difference]: Start difference. First operand has 81 places, 90 transitions, 715 flow. Second operand 7 states and 128 transitions. [2024-06-21 19:32:58,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 116 transitions, 1058 flow [2024-06-21 19:32:58,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 116 transitions, 979 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 19:32:58,184 INFO L231 Difference]: Finished difference. Result has 86 places, 98 transitions, 851 flow [2024-06-21 19:32:58,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=851, PETRI_PLACES=86, PETRI_TRANSITIONS=98} [2024-06-21 19:32:58,185 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-21 19:32:58,185 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 98 transitions, 851 flow [2024-06-21 19:32:58,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:32:58,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:32:58,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:32:58,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 19:32:58,186 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)] === [2024-06-21 19:32:58,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:32:58,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1829472215, now seen corresponding path program 1 times [2024-06-21 19:32:58,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:32:58,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089769036] [2024-06-21 19:32:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:32:58,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:32:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:01,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:01,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089769036] [2024-06-21 19:33:01,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089769036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:01,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:01,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:33:01,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793530655] [2024-06-21 19:33:01,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:01,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:33:01,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:01,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:33:01,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:33:01,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:33:01,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 98 transitions, 851 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:33:01,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:01,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:33:01,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:02,292 INFO L124 PetriNetUnfolderBase]: 1227/1918 cut-off events. [2024-06-21 19:33:02,292 INFO L125 PetriNetUnfolderBase]: For 13152/13161 co-relation queries the response was YES. [2024-06-21 19:33:02,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8862 conditions, 1918 events. 1227/1918 cut-off events. For 13152/13161 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9195 event pairs, 375 based on Foata normal form. 16/1931 useless extension candidates. Maximal degree in co-relation 8819. Up to 1701 conditions per place. [2024-06-21 19:33:02,304 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 106 selfloop transitions, 18 changer transitions 0/129 dead transitions. [2024-06-21 19:33:02,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 129 transitions, 1218 flow [2024-06-21 19:33:02,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:33:02,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:33:02,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 19:33:02,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 19:33:02,307 INFO L175 Difference]: Start difference. First operand has 86 places, 98 transitions, 851 flow. Second operand 8 states and 135 transitions. [2024-06-21 19:33:02,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 129 transitions, 1218 flow [2024-06-21 19:33:02,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 129 transitions, 1143 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 19:33:02,324 INFO L231 Difference]: Finished difference. Result has 88 places, 100 transitions, 842 flow [2024-06-21 19:33:02,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=842, PETRI_PLACES=88, PETRI_TRANSITIONS=100} [2024-06-21 19:33:02,324 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-21 19:33:02,324 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 100 transitions, 842 flow [2024-06-21 19:33:02,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:33:02,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:02,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:02,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 19:33:02,325 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)] === [2024-06-21 19:33:02,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:02,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1716578270, now seen corresponding path program 1 times [2024-06-21 19:33:02,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:02,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36591138] [2024-06-21 19:33:02,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:02,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:05,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:05,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36591138] [2024-06-21 19:33:05,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36591138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:05,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:05,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:33:05,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472980816] [2024-06-21 19:33:05,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:05,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:33:05,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:05,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:33:05,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:33:05,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:33:05,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 100 transitions, 842 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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) [2024-06-21 19:33:05,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:05,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:33:05,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:06,491 INFO L124 PetriNetUnfolderBase]: 1240/1942 cut-off events. [2024-06-21 19:33:06,491 INFO L125 PetriNetUnfolderBase]: For 12932/12941 co-relation queries the response was YES. [2024-06-21 19:33:06,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9001 conditions, 1942 events. 1240/1942 cut-off events. For 12932/12941 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9388 event pairs, 380 based on Foata normal form. 10/1948 useless extension candidates. Maximal degree in co-relation 8958. Up to 1795 conditions per place. [2024-06-21 19:33:06,504 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 113 selfloop transitions, 21 changer transitions 0/139 dead transitions. [2024-06-21 19:33:06,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 139 transitions, 1279 flow [2024-06-21 19:33:06,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:33:06,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:33:06,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 19:33:06,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:33:06,506 INFO L175 Difference]: Start difference. First operand has 88 places, 100 transitions, 842 flow. Second operand 8 states and 136 transitions. [2024-06-21 19:33:06,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 139 transitions, 1279 flow [2024-06-21 19:33:06,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 139 transitions, 1234 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 19:33:06,526 INFO L231 Difference]: Finished difference. Result has 93 places, 112 transitions, 975 flow [2024-06-21 19:33:06,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=975, PETRI_PLACES=93, PETRI_TRANSITIONS=112} [2024-06-21 19:33:06,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-21 19:33:06,528 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 112 transitions, 975 flow [2024-06-21 19:33:06,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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) [2024-06-21 19:33:06,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:06,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:06,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 19:33:06,528 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)] === [2024-06-21 19:33:06,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:06,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1355616656, now seen corresponding path program 2 times [2024-06-21 19:33:06,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:06,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040215729] [2024-06-21 19:33:06,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:06,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:09,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:09,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040215729] [2024-06-21 19:33:09,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040215729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:09,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:09,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:33:09,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651859480] [2024-06-21 19:33:09,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:09,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:33:09,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:09,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:33:09,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:33:09,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:33:09,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 112 transitions, 975 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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) [2024-06-21 19:33:09,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:09,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:33:09,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:10,783 INFO L124 PetriNetUnfolderBase]: 1253/1963 cut-off events. [2024-06-21 19:33:10,784 INFO L125 PetriNetUnfolderBase]: For 14935/14945 co-relation queries the response was YES. [2024-06-21 19:33:10,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9499 conditions, 1963 events. 1253/1963 cut-off events. For 14935/14945 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9471 event pairs, 376 based on Foata normal form. 6/1964 useless extension candidates. Maximal degree in co-relation 9453. Up to 1689 conditions per place. [2024-06-21 19:33:10,819 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 110 selfloop transitions, 37 changer transitions 0/152 dead transitions. [2024-06-21 19:33:10,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 152 transitions, 1493 flow [2024-06-21 19:33:10,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:33:10,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:33:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 19:33:10,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-21 19:33:10,822 INFO L175 Difference]: Start difference. First operand has 93 places, 112 transitions, 975 flow. Second operand 7 states and 132 transitions. [2024-06-21 19:33:10,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 152 transitions, 1493 flow [2024-06-21 19:33:10,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 152 transitions, 1463 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 19:33:10,858 INFO L231 Difference]: Finished difference. Result has 99 places, 123 transitions, 1146 flow [2024-06-21 19:33:10,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1146, PETRI_PLACES=99, PETRI_TRANSITIONS=123} [2024-06-21 19:33:10,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-21 19:33:10,858 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 123 transitions, 1146 flow [2024-06-21 19:33:10,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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) [2024-06-21 19:33:10,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:10,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:10,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 19:33:10,859 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)] === [2024-06-21 19:33:10,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:10,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1720297340, now seen corresponding path program 3 times [2024-06-21 19:33:10,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:10,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975420809] [2024-06-21 19:33:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:10,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:13,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:13,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975420809] [2024-06-21 19:33:13,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975420809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:13,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:13,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:33:13,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413395646] [2024-06-21 19:33:13,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:13,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:33:13,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:13,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:33:13,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:33:13,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:33:13,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 123 transitions, 1146 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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) [2024-06-21 19:33:13,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:13,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:33:13,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:15,047 INFO L124 PetriNetUnfolderBase]: 1266/1988 cut-off events. [2024-06-21 19:33:15,047 INFO L125 PetriNetUnfolderBase]: For 17850/17860 co-relation queries the response was YES. [2024-06-21 19:33:15,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10184 conditions, 1988 events. 1266/1988 cut-off events. For 17850/17860 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9604 event pairs, 376 based on Foata normal form. 6/1989 useless extension candidates. Maximal degree in co-relation 10134. Up to 1703 conditions per place. [2024-06-21 19:33:15,060 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 112 selfloop transitions, 39 changer transitions 0/156 dead transitions. [2024-06-21 19:33:15,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 156 transitions, 1629 flow [2024-06-21 19:33:15,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:33:15,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:33:15,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 19:33:15,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-21 19:33:15,080 INFO L175 Difference]: Start difference. First operand has 99 places, 123 transitions, 1146 flow. Second operand 7 states and 132 transitions. [2024-06-21 19:33:15,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 156 transitions, 1629 flow [2024-06-21 19:33:15,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 156 transitions, 1590 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 19:33:15,101 INFO L231 Difference]: Finished difference. Result has 104 places, 127 transitions, 1236 flow [2024-06-21 19:33:15,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1113, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1236, PETRI_PLACES=104, PETRI_TRANSITIONS=127} [2024-06-21 19:33:15,102 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-21 19:33:15,102 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 127 transitions, 1236 flow [2024-06-21 19:33:15,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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) [2024-06-21 19:33:15,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:15,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:15,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 19:33:15,103 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)] === [2024-06-21 19:33:15,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:15,103 INFO L85 PathProgramCache]: Analyzing trace with hash -579339174, now seen corresponding path program 4 times [2024-06-21 19:33:15,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:15,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865500731] [2024-06-21 19:33:15,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:15,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:17,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:17,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865500731] [2024-06-21 19:33:17,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865500731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:17,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:17,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:33:17,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568557992] [2024-06-21 19:33:17,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:17,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:33:17,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:17,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:33:17,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:33:17,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:33:17,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 127 transitions, 1236 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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) [2024-06-21 19:33:17,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:17,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:33:17,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:18,624 INFO L124 PetriNetUnfolderBase]: 1274/2000 cut-off events. [2024-06-21 19:33:18,625 INFO L125 PetriNetUnfolderBase]: For 19533/19543 co-relation queries the response was YES. [2024-06-21 19:33:18,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10441 conditions, 2000 events. 1274/2000 cut-off events. For 19533/19543 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9674 event pairs, 376 based on Foata normal form. 6/2001 useless extension candidates. Maximal degree in co-relation 10387. Up to 1779 conditions per place. [2024-06-21 19:33:18,636 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 114 selfloop transitions, 34 changer transitions 0/153 dead transitions. [2024-06-21 19:33:18,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 153 transitions, 1648 flow [2024-06-21 19:33:18,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:33:18,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:33:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 19:33:18,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 19:33:18,638 INFO L175 Difference]: Start difference. First operand has 104 places, 127 transitions, 1236 flow. Second operand 7 states and 122 transitions. [2024-06-21 19:33:18,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 153 transitions, 1648 flow [2024-06-21 19:33:18,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 153 transitions, 1574 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 19:33:18,660 INFO L231 Difference]: Finished difference. Result has 109 places, 133 transitions, 1331 flow [2024-06-21 19:33:18,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1331, PETRI_PLACES=109, PETRI_TRANSITIONS=133} [2024-06-21 19:33:18,660 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-21 19:33:18,660 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 133 transitions, 1331 flow [2024-06-21 19:33:18,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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) [2024-06-21 19:33:18,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:18,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:18,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 19:33:18,661 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)] === [2024-06-21 19:33:18,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:18,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2065661302, now seen corresponding path program 1 times [2024-06-21 19:33:18,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:18,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605114766] [2024-06-21 19:33:18,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:18,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:21,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:21,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605114766] [2024-06-21 19:33:21,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605114766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:21,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:21,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:33:21,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680235463] [2024-06-21 19:33:21,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:21,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:33:21,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:21,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:33:21,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:33:21,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:33:21,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 133 transitions, 1331 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) [2024-06-21 19:33:21,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:21,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:33:21,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:23,604 INFO L124 PetriNetUnfolderBase]: 1472/2329 cut-off events. [2024-06-21 19:33:23,604 INFO L125 PetriNetUnfolderBase]: For 28970/28989 co-relation queries the response was YES. [2024-06-21 19:33:23,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12410 conditions, 2329 events. 1472/2329 cut-off events. For 28970/28989 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12049 event pairs, 339 based on Foata normal form. 31/2307 useless extension candidates. Maximal degree in co-relation 12353. Up to 1766 conditions per place. [2024-06-21 19:33:23,616 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 128 selfloop transitions, 42 changer transitions 0/191 dead transitions. [2024-06-21 19:33:23,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 191 transitions, 1943 flow [2024-06-21 19:33:23,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:33:23,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:33:23,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-21 19:33:23,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44372294372294374 [2024-06-21 19:33:23,618 INFO L175 Difference]: Start difference. First operand has 109 places, 133 transitions, 1331 flow. Second operand 11 states and 205 transitions. [2024-06-21 19:33:23,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 191 transitions, 1943 flow [2024-06-21 19:33:23,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 191 transitions, 1866 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 19:33:23,680 INFO L231 Difference]: Finished difference. Result has 116 places, 137 transitions, 1392 flow [2024-06-21 19:33:23,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1392, PETRI_PLACES=116, PETRI_TRANSITIONS=137} [2024-06-21 19:33:23,681 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 19:33:23,681 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 137 transitions, 1392 flow [2024-06-21 19:33:23,681 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) [2024-06-21 19:33:23,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:23,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:23,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 19:33:23,683 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)] === [2024-06-21 19:33:23,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:23,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1674315106, now seen corresponding path program 2 times [2024-06-21 19:33:23,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:23,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412037293] [2024-06-21 19:33:23,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:23,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:26,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:26,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412037293] [2024-06-21 19:33:26,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412037293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:26,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:26,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:33:26,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230975713] [2024-06-21 19:33:26,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:26,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:33:26,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:26,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:33:26,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:33:26,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:33:26,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 137 transitions, 1392 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) [2024-06-21 19:33:26,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:26,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:33:26,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:28,487 INFO L124 PetriNetUnfolderBase]: 1434/2281 cut-off events. [2024-06-21 19:33:28,487 INFO L125 PetriNetUnfolderBase]: For 30291/30311 co-relation queries the response was YES. [2024-06-21 19:33:28,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12466 conditions, 2281 events. 1434/2281 cut-off events. For 30291/30311 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11838 event pairs, 367 based on Foata normal form. 27/2265 useless extension candidates. Maximal degree in co-relation 12407. Up to 1958 conditions per place. [2024-06-21 19:33:28,502 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 115 selfloop transitions, 39 changer transitions 0/175 dead transitions. [2024-06-21 19:33:28,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 175 transitions, 1824 flow [2024-06-21 19:33:28,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:33:28,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:33:28,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 19:33:28,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-21 19:33:28,515 INFO L175 Difference]: Start difference. First operand has 116 places, 137 transitions, 1392 flow. Second operand 10 states and 179 transitions. [2024-06-21 19:33:28,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 175 transitions, 1824 flow [2024-06-21 19:33:28,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 175 transitions, 1771 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 19:33:28,545 INFO L231 Difference]: Finished difference. Result has 119 places, 137 transitions, 1426 flow [2024-06-21 19:33:28,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1426, PETRI_PLACES=119, PETRI_TRANSITIONS=137} [2024-06-21 19:33:28,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-21 19:33:28,546 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 137 transitions, 1426 flow [2024-06-21 19:33:28,546 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) [2024-06-21 19:33:28,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:28,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:28,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 19:33:28,547 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)] === [2024-06-21 19:33:28,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:28,547 INFO L85 PathProgramCache]: Analyzing trace with hash 925379932, now seen corresponding path program 3 times [2024-06-21 19:33:28,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:28,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646529018] [2024-06-21 19:33:28,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:28,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:31,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:31,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:31,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646529018] [2024-06-21 19:33:31,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646529018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:31,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:31,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:33:31,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586112947] [2024-06-21 19:33:31,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:31,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:33:31,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:31,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:33:31,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:33:31,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:33:31,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 137 transitions, 1426 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) [2024-06-21 19:33:31,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:31,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:33:31,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:33,367 INFO L124 PetriNetUnfolderBase]: 1513/2405 cut-off events. [2024-06-21 19:33:33,367 INFO L125 PetriNetUnfolderBase]: For 34208/34235 co-relation queries the response was YES. [2024-06-21 19:33:33,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13307 conditions, 2405 events. 1513/2405 cut-off events. For 34208/34235 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12563 event pairs, 390 based on Foata normal form. 20/2379 useless extension candidates. Maximal degree in co-relation 13246. Up to 1937 conditions per place. [2024-06-21 19:33:33,381 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 88 selfloop transitions, 66 changer transitions 0/175 dead transitions. [2024-06-21 19:33:33,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 175 transitions, 1891 flow [2024-06-21 19:33:33,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:33:33,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:33:33,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-21 19:33:33,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2024-06-21 19:33:33,384 INFO L175 Difference]: Start difference. First operand has 119 places, 137 transitions, 1426 flow. Second operand 11 states and 194 transitions. [2024-06-21 19:33:33,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 175 transitions, 1891 flow [2024-06-21 19:33:33,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 175 transitions, 1816 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 19:33:33,411 INFO L231 Difference]: Finished difference. Result has 122 places, 138 transitions, 1504 flow [2024-06-21 19:33:33,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1504, PETRI_PLACES=122, PETRI_TRANSITIONS=138} [2024-06-21 19:33:33,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-21 19:33:33,412 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 138 transitions, 1504 flow [2024-06-21 19:33:33,412 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) [2024-06-21 19:33:33,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:33,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:33,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 19:33:33,412 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)] === [2024-06-21 19:33:33,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:33,413 INFO L85 PathProgramCache]: Analyzing trace with hash -782505882, now seen corresponding path program 4 times [2024-06-21 19:33:33,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:33,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531566783] [2024-06-21 19:33:33,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:33,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:35,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:35,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531566783] [2024-06-21 19:33:35,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531566783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:35,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:35,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:33:35,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010403496] [2024-06-21 19:33:35,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:35,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:33:35,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:35,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:33:35,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:33:35,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:33:35,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 138 transitions, 1504 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) [2024-06-21 19:33:35,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:35,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:33:35,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:37,202 INFO L124 PetriNetUnfolderBase]: 1798/2856 cut-off events. [2024-06-21 19:33:37,203 INFO L125 PetriNetUnfolderBase]: For 45102/45131 co-relation queries the response was YES. [2024-06-21 19:33:37,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16173 conditions, 2856 events. 1798/2856 cut-off events. For 45102/45131 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15450 event pairs, 393 based on Foata normal form. 34/2829 useless extension candidates. Maximal degree in co-relation 16111. Up to 1867 conditions per place. [2024-06-21 19:33:37,230 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 108 selfloop transitions, 62 changer transitions 0/191 dead transitions. [2024-06-21 19:33:37,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 191 transitions, 2172 flow [2024-06-21 19:33:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:33:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:33:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 19:33:37,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-21 19:33:37,233 INFO L175 Difference]: Start difference. First operand has 122 places, 138 transitions, 1504 flow. Second operand 9 states and 178 transitions. [2024-06-21 19:33:37,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 191 transitions, 2172 flow [2024-06-21 19:33:37,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 191 transitions, 2029 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 19:33:37,278 INFO L231 Difference]: Finished difference. Result has 123 places, 146 transitions, 1627 flow [2024-06-21 19:33:37,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1627, PETRI_PLACES=123, PETRI_TRANSITIONS=146} [2024-06-21 19:33:37,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-21 19:33:37,279 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 146 transitions, 1627 flow [2024-06-21 19:33:37,279 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) [2024-06-21 19:33:37,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:37,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:37,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 19:33:37,279 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)] === [2024-06-21 19:33:37,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:37,280 INFO L85 PathProgramCache]: Analyzing trace with hash 439398798, now seen corresponding path program 5 times [2024-06-21 19:33:37,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:37,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353793901] [2024-06-21 19:33:37,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:37,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:39,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:39,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353793901] [2024-06-21 19:33:39,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353793901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:39,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:39,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:33:39,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170769269] [2024-06-21 19:33:39,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:39,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:33:39,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:39,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:33:39,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:33:39,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:33:39,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 146 transitions, 1627 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) [2024-06-21 19:33:39,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:39,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:33:39,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:41,127 INFO L124 PetriNetUnfolderBase]: 1750/2794 cut-off events. [2024-06-21 19:33:41,127 INFO L125 PetriNetUnfolderBase]: For 47442/47472 co-relation queries the response was YES. [2024-06-21 19:33:41,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16336 conditions, 2794 events. 1750/2794 cut-off events. For 47442/47472 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15176 event pairs, 470 based on Foata normal form. 25/2768 useless extension candidates. Maximal degree in co-relation 16273. Up to 2304 conditions per place. [2024-06-21 19:33:41,147 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 102 selfloop transitions, 54 changer transitions 0/177 dead transitions. [2024-06-21 19:33:41,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 177 transitions, 2073 flow [2024-06-21 19:33:41,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:33:41,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:33:41,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 19:33:41,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 19:33:41,149 INFO L175 Difference]: Start difference. First operand has 123 places, 146 transitions, 1627 flow. Second operand 8 states and 150 transitions. [2024-06-21 19:33:41,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 177 transitions, 2073 flow [2024-06-21 19:33:41,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 177 transitions, 1943 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 19:33:41,207 INFO L231 Difference]: Finished difference. Result has 124 places, 148 transitions, 1658 flow [2024-06-21 19:33:41,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1658, PETRI_PLACES=124, PETRI_TRANSITIONS=148} [2024-06-21 19:33:41,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-21 19:33:41,208 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 148 transitions, 1658 flow [2024-06-21 19:33:41,208 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) [2024-06-21 19:33:41,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:41,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:41,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 19:33:41,208 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)] === [2024-06-21 19:33:41,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:41,209 INFO L85 PathProgramCache]: Analyzing trace with hash -365613048, now seen corresponding path program 6 times [2024-06-21 19:33:41,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:41,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605945815] [2024-06-21 19:33:41,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:41,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:43,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:43,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605945815] [2024-06-21 19:33:43,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605945815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:43,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:43,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:33:43,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301563164] [2024-06-21 19:33:43,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:43,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:33:43,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:43,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:33:43,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:33:43,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 19:33:43,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 148 transitions, 1658 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:33:43,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:43,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 19:33:43,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:44,136 INFO L124 PetriNetUnfolderBase]: 1427/2446 cut-off events. [2024-06-21 19:33:44,137 INFO L125 PetriNetUnfolderBase]: For 40618/40743 co-relation queries the response was YES. [2024-06-21 19:33:44,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13386 conditions, 2446 events. 1427/2446 cut-off events. For 40618/40743 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 14135 event pairs, 220 based on Foata normal form. 123/2484 useless extension candidates. Maximal degree in co-relation 13323. Up to 1270 conditions per place. [2024-06-21 19:33:44,158 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 65 selfloop transitions, 51 changer transitions 0/172 dead transitions. [2024-06-21 19:33:44,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 172 transitions, 1983 flow [2024-06-21 19:33:44,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:33:44,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:33:44,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 19:33:44,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-21 19:33:44,160 INFO L175 Difference]: Start difference. First operand has 124 places, 148 transitions, 1658 flow. Second operand 7 states and 142 transitions. [2024-06-21 19:33:44,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 172 transitions, 1983 flow [2024-06-21 19:33:44,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 172 transitions, 1862 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 19:33:44,202 INFO L231 Difference]: Finished difference. Result has 125 places, 150 transitions, 1724 flow [2024-06-21 19:33:44,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1724, PETRI_PLACES=125, PETRI_TRANSITIONS=150} [2024-06-21 19:33:44,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-21 19:33:44,203 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 150 transitions, 1724 flow [2024-06-21 19:33:44,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:33:44,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:44,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:44,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 19:33:44,205 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:33:44,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:44,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2109765371, now seen corresponding path program 1 times [2024-06-21 19:33:44,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:44,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980211949] [2024-06-21 19:33:44,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:44,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:47,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:47,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980211949] [2024-06-21 19:33:47,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980211949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:47,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:47,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:33:47,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004897290] [2024-06-21 19:33:47,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:47,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:33:47,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:47,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:33:47,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:33:47,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:33:47,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 150 transitions, 1724 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:33:47,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:47,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:33:47,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:48,990 INFO L124 PetriNetUnfolderBase]: 1964/3142 cut-off events. [2024-06-21 19:33:48,991 INFO L125 PetriNetUnfolderBase]: For 43990/44006 co-relation queries the response was YES. [2024-06-21 19:33:49,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17524 conditions, 3142 events. 1964/3142 cut-off events. For 43990/44006 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17520 event pairs, 499 based on Foata normal form. 26/3164 useless extension candidates. Maximal degree in co-relation 17460. Up to 2627 conditions per place. [2024-06-21 19:33:49,010 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 175 selfloop transitions, 25 changer transitions 0/205 dead transitions. [2024-06-21 19:33:49,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 205 transitions, 2408 flow [2024-06-21 19:33:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:33:49,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:33:49,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 19:33:49,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 19:33:49,012 INFO L175 Difference]: Start difference. First operand has 125 places, 150 transitions, 1724 flow. Second operand 10 states and 178 transitions. [2024-06-21 19:33:49,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 205 transitions, 2408 flow [2024-06-21 19:33:49,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 205 transitions, 2325 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 19:33:49,061 INFO L231 Difference]: Finished difference. Result has 132 places, 155 transitions, 1765 flow [2024-06-21 19:33:49,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1765, PETRI_PLACES=132, PETRI_TRANSITIONS=155} [2024-06-21 19:33:49,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-21 19:33:49,062 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 155 transitions, 1765 flow [2024-06-21 19:33:49,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:33:49,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:49,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:49,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 19:33:49,063 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)] === [2024-06-21 19:33:49,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:49,063 INFO L85 PathProgramCache]: Analyzing trace with hash 364309821, now seen corresponding path program 2 times [2024-06-21 19:33:49,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:49,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448257817] [2024-06-21 19:33:49,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:49,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:52,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:52,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448257817] [2024-06-21 19:33:52,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448257817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:52,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:52,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:33:52,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535564330] [2024-06-21 19:33:52,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:52,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:33:52,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:52,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:33:52,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:33:52,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:33:52,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 155 transitions, 1765 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:33:52,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:52,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:33:52,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:53,924 INFO L124 PetriNetUnfolderBase]: 2004/3226 cut-off events. [2024-06-21 19:33:53,925 INFO L125 PetriNetUnfolderBase]: For 40885/40901 co-relation queries the response was YES. [2024-06-21 19:33:53,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17263 conditions, 3226 events. 2004/3226 cut-off events. For 40885/40901 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18173 event pairs, 555 based on Foata normal form. 30/3252 useless extension candidates. Maximal degree in co-relation 17198. Up to 2911 conditions per place. [2024-06-21 19:33:53,949 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 165 selfloop transitions, 22 changer transitions 0/192 dead transitions. [2024-06-21 19:33:53,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 192 transitions, 2258 flow [2024-06-21 19:33:53,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:33:53,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:33:53,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 19:33:53,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 19:33:53,964 INFO L175 Difference]: Start difference. First operand has 132 places, 155 transitions, 1765 flow. Second operand 9 states and 154 transitions. [2024-06-21 19:33:53,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 192 transitions, 2258 flow [2024-06-21 19:33:54,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 192 transitions, 2223 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 19:33:54,017 INFO L231 Difference]: Finished difference. Result has 136 places, 156 transitions, 1792 flow [2024-06-21 19:33:54,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1792, PETRI_PLACES=136, PETRI_TRANSITIONS=156} [2024-06-21 19:33:54,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-21 19:33:54,018 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 156 transitions, 1792 flow [2024-06-21 19:33:54,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:33:54,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:54,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:54,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 19:33:54,018 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)] === [2024-06-21 19:33:54,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:54,019 INFO L85 PathProgramCache]: Analyzing trace with hash 364161951, now seen corresponding path program 3 times [2024-06-21 19:33:54,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:54,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768200539] [2024-06-21 19:33:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:54,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:33:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:33:57,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:33:57,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768200539] [2024-06-21 19:33:57,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768200539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:33:57,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:33:57,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:33:57,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948797574] [2024-06-21 19:33:57,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:33:57,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:33:57,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:33:57,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:33:57,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:33:57,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:33:57,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 156 transitions, 1792 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:33:57,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:33:57,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:33:57,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:33:58,898 INFO L124 PetriNetUnfolderBase]: 1984/3194 cut-off events. [2024-06-21 19:33:58,898 INFO L125 PetriNetUnfolderBase]: For 41051/41067 co-relation queries the response was YES. [2024-06-21 19:33:58,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17154 conditions, 3194 events. 1984/3194 cut-off events. For 41051/41067 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17977 event pairs, 521 based on Foata normal form. 26/3216 useless extension candidates. Maximal degree in co-relation 17087. Up to 2773 conditions per place. [2024-06-21 19:33:58,921 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 169 selfloop transitions, 24 changer transitions 0/198 dead transitions. [2024-06-21 19:33:58,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 198 transitions, 2339 flow [2024-06-21 19:33:58,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:33:58,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:33:58,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 19:33:58,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 19:33:58,924 INFO L175 Difference]: Start difference. First operand has 136 places, 156 transitions, 1792 flow. Second operand 9 states and 157 transitions. [2024-06-21 19:33:58,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 198 transitions, 2339 flow [2024-06-21 19:33:58,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 198 transitions, 2290 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 19:33:58,978 INFO L231 Difference]: Finished difference. Result has 139 places, 159 transitions, 1846 flow [2024-06-21 19:33:58,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1846, PETRI_PLACES=139, PETRI_TRANSITIONS=159} [2024-06-21 19:33:58,979 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-21 19:33:58,979 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 159 transitions, 1846 flow [2024-06-21 19:33:58,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:33:58,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:33:58,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:33:58,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 19:33:58,980 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)] === [2024-06-21 19:33:58,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:33:58,981 INFO L85 PathProgramCache]: Analyzing trace with hash -351268825, now seen corresponding path program 4 times [2024-06-21 19:33:58,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:33:58,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041112503] [2024-06-21 19:33:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:33:58,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:33:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:34:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:34:02,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:34:02,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041112503] [2024-06-21 19:34:02,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041112503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:34:02,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:34:02,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:34:02,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287204562] [2024-06-21 19:34:02,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:34:02,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:34:02,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:34:02,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:34:02,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:34:02,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:34:02,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 159 transitions, 1846 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:02,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:34:02,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:34:02,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:34:04,043 INFO L124 PetriNetUnfolderBase]: 2052/3306 cut-off events. [2024-06-21 19:34:04,043 INFO L125 PetriNetUnfolderBase]: For 45603/45613 co-relation queries the response was YES. [2024-06-21 19:34:04,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17739 conditions, 3306 events. 2052/3306 cut-off events. For 45603/45613 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18738 event pairs, 562 based on Foata normal form. 20/3321 useless extension candidates. Maximal degree in co-relation 17670. Up to 2856 conditions per place. [2024-06-21 19:34:04,065 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 143 selfloop transitions, 46 changer transitions 0/194 dead transitions. [2024-06-21 19:34:04,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 194 transitions, 2336 flow [2024-06-21 19:34:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:34:04,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:34:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 19:34:04,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 19:34:04,074 INFO L175 Difference]: Start difference. First operand has 139 places, 159 transitions, 1846 flow. Second operand 9 states and 156 transitions. [2024-06-21 19:34:04,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 194 transitions, 2336 flow [2024-06-21 19:34:04,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 194 transitions, 2307 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 19:34:04,125 INFO L231 Difference]: Finished difference. Result has 143 places, 160 transitions, 1926 flow [2024-06-21 19:34:04,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1817, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1926, PETRI_PLACES=143, PETRI_TRANSITIONS=160} [2024-06-21 19:34:04,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-21 19:34:04,126 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 160 transitions, 1926 flow [2024-06-21 19:34:04,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:04,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:34:04,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:34:04,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 19:34:04,128 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)] === [2024-06-21 19:34:04,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:34:04,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1377844093, now seen corresponding path program 5 times [2024-06-21 19:34:04,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:34:04,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927357940] [2024-06-21 19:34:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:34:04,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:34:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:34:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:34:07,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:34:07,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927357940] [2024-06-21 19:34:07,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927357940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:34:07,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:34:07,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:34:07,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6620676] [2024-06-21 19:34:07,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:34:07,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:34:07,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:34:07,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:34:07,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:34:07,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:34:07,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 160 transitions, 1926 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:07,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:34:07,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:34:07,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:34:09,244 INFO L124 PetriNetUnfolderBase]: 2120/3434 cut-off events. [2024-06-21 19:34:09,245 INFO L125 PetriNetUnfolderBase]: For 49026/49036 co-relation queries the response was YES. [2024-06-21 19:34:09,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18536 conditions, 3434 events. 2120/3434 cut-off events. For 49026/49036 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19783 event pairs, 580 based on Foata normal form. 20/3449 useless extension candidates. Maximal degree in co-relation 18465. Up to 2972 conditions per place. [2024-06-21 19:34:09,270 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 146 selfloop transitions, 44 changer transitions 0/195 dead transitions. [2024-06-21 19:34:09,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 195 transitions, 2420 flow [2024-06-21 19:34:09,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:34:09,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:34:09,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 19:34:09,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 19:34:09,272 INFO L175 Difference]: Start difference. First operand has 143 places, 160 transitions, 1926 flow. Second operand 9 states and 156 transitions. [2024-06-21 19:34:09,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 195 transitions, 2420 flow [2024-06-21 19:34:09,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 195 transitions, 2323 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 19:34:09,335 INFO L231 Difference]: Finished difference. Result has 145 places, 161 transitions, 1936 flow [2024-06-21 19:34:09,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1829, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1936, PETRI_PLACES=145, PETRI_TRANSITIONS=161} [2024-06-21 19:34:09,336 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-21 19:34:09,336 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 161 transitions, 1936 flow [2024-06-21 19:34:09,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:09,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:34:09,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:34:09,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 19:34:09,337 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)] === [2024-06-21 19:34:09,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:34:09,337 INFO L85 PathProgramCache]: Analyzing trace with hash -356779075, now seen corresponding path program 6 times [2024-06-21 19:34:09,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:34:09,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625969911] [2024-06-21 19:34:09,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:34:09,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:34:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:34:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:34:12,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:34:12,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625969911] [2024-06-21 19:34:12,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625969911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:34:12,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:34:12,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:34:12,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172606069] [2024-06-21 19:34:12,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:34:12,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:34:12,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:34:12,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:34:12,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:34:13,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:34:13,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 161 transitions, 1936 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:13,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:34:13,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:34:13,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:34:14,528 INFO L124 PetriNetUnfolderBase]: 2168/3530 cut-off events. [2024-06-21 19:34:14,528 INFO L125 PetriNetUnfolderBase]: For 51389/51399 co-relation queries the response was YES. [2024-06-21 19:34:14,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18969 conditions, 3530 events. 2168/3530 cut-off events. For 51389/51399 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 20539 event pairs, 578 based on Foata normal form. 16/3541 useless extension candidates. Maximal degree in co-relation 18898. Up to 2838 conditions per place. [2024-06-21 19:34:14,554 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 149 selfloop transitions, 47 changer transitions 0/201 dead transitions. [2024-06-21 19:34:14,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 201 transitions, 2476 flow [2024-06-21 19:34:14,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:34:14,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:34:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 19:34:14,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-21 19:34:14,556 INFO L175 Difference]: Start difference. First operand has 145 places, 161 transitions, 1936 flow. Second operand 9 states and 158 transitions. [2024-06-21 19:34:14,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 201 transitions, 2476 flow [2024-06-21 19:34:14,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 201 transitions, 2357 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 19:34:14,626 INFO L231 Difference]: Finished difference. Result has 147 places, 164 transitions, 1962 flow [2024-06-21 19:34:14,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1817, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1962, PETRI_PLACES=147, PETRI_TRANSITIONS=164} [2024-06-21 19:34:14,627 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-21 19:34:14,627 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 164 transitions, 1962 flow [2024-06-21 19:34:14,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:14,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:34:14,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:34:14,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 19:34:14,628 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)] === [2024-06-21 19:34:14,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:34:14,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1372266511, now seen corresponding path program 1 times [2024-06-21 19:34:14,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:34:14,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799722757] [2024-06-21 19:34:14,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:34:14,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:34:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:34:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:34:18,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:34:18,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799722757] [2024-06-21 19:34:18,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799722757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:34:18,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:34:18,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:34:18,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221302847] [2024-06-21 19:34:18,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:34:18,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:34:18,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:34:18,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:34:18,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:34:18,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:34:18,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 164 transitions, 1962 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:18,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:34:18,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:34:18,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:34:19,743 INFO L124 PetriNetUnfolderBase]: 2332/3818 cut-off events. [2024-06-21 19:34:19,743 INFO L125 PetriNetUnfolderBase]: For 59852/59862 co-relation queries the response was YES. [2024-06-21 19:34:19,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20597 conditions, 3818 events. 2332/3818 cut-off events. For 59852/59862 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 22736 event pairs, 557 based on Foata normal form. 16/3829 useless extension candidates. Maximal degree in co-relation 20525. Up to 2826 conditions per place. [2024-06-21 19:34:19,774 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 152 selfloop transitions, 51 changer transitions 0/208 dead transitions. [2024-06-21 19:34:19,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 208 transitions, 2638 flow [2024-06-21 19:34:19,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:34:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:34:19,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 19:34:19,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 19:34:19,777 INFO L175 Difference]: Start difference. First operand has 147 places, 164 transitions, 1962 flow. Second operand 9 states and 161 transitions. [2024-06-21 19:34:19,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 208 transitions, 2638 flow [2024-06-21 19:34:19,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 208 transitions, 2571 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 19:34:19,867 INFO L231 Difference]: Finished difference. Result has 152 places, 169 transitions, 2082 flow [2024-06-21 19:34:19,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1895, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2082, PETRI_PLACES=152, PETRI_TRANSITIONS=169} [2024-06-21 19:34:19,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-21 19:34:19,867 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 169 transitions, 2082 flow [2024-06-21 19:34:19,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:19,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:34:19,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:34:19,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 19:34:19,868 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)] === [2024-06-21 19:34:19,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:34:19,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1327265935, now seen corresponding path program 2 times [2024-06-21 19:34:19,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:34:19,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931906346] [2024-06-21 19:34:19,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:34:19,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:34:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:34:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:34:24,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:34:24,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931906346] [2024-06-21 19:34:24,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931906346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:34:24,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:34:24,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:34:24,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369741247] [2024-06-21 19:34:24,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:34:24,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:34:24,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:34:24,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:34:24,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:34:24,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:34:24,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 169 transitions, 2082 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:24,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:34:24,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:34:24,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:34:25,634 INFO L124 PetriNetUnfolderBase]: 2352/3858 cut-off events. [2024-06-21 19:34:25,635 INFO L125 PetriNetUnfolderBase]: For 63441/63451 co-relation queries the response was YES. [2024-06-21 19:34:25,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21172 conditions, 3858 events. 2352/3858 cut-off events. For 63441/63451 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23062 event pairs, 591 based on Foata normal form. 16/3869 useless extension candidates. Maximal degree in co-relation 21097. Up to 2754 conditions per place. [2024-06-21 19:34:25,668 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 157 selfloop transitions, 53 changer transitions 0/215 dead transitions. [2024-06-21 19:34:25,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 215 transitions, 2752 flow [2024-06-21 19:34:25,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:34:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:34:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 19:34:25,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 19:34:25,670 INFO L175 Difference]: Start difference. First operand has 152 places, 169 transitions, 2082 flow. Second operand 10 states and 177 transitions. [2024-06-21 19:34:25,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 215 transitions, 2752 flow [2024-06-21 19:34:25,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 215 transitions, 2677 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 19:34:25,782 INFO L231 Difference]: Finished difference. Result has 157 places, 170 transitions, 2137 flow [2024-06-21 19:34:25,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2137, PETRI_PLACES=157, PETRI_TRANSITIONS=170} [2024-06-21 19:34:25,783 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 19:34:25,783 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 170 transitions, 2137 flow [2024-06-21 19:34:25,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:25,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:34:25,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:34:25,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 19:34:25,784 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)] === [2024-06-21 19:34:25,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:34:25,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1512122651, now seen corresponding path program 7 times [2024-06-21 19:34:25,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:34:25,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566817553] [2024-06-21 19:34:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:34:25,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:34:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:34:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:34:28,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:34:28,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566817553] [2024-06-21 19:34:28,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566817553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:34:28,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:34:28,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:34:28,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710569503] [2024-06-21 19:34:28,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:34:28,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:34:28,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:34:28,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:34:28,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:34:28,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:34:28,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 170 transitions, 2137 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:28,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:34:28,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:34:28,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:34:30,154 INFO L124 PetriNetUnfolderBase]: 2488/4114 cut-off events. [2024-06-21 19:34:30,154 INFO L125 PetriNetUnfolderBase]: For 71711/71721 co-relation queries the response was YES. [2024-06-21 19:34:30,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22701 conditions, 4114 events. 2488/4114 cut-off events. For 71711/71721 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 25185 event pairs, 579 based on Foata normal form. 16/4125 useless extension candidates. Maximal degree in co-relation 22624. Up to 2963 conditions per place. [2024-06-21 19:34:30,189 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 167 selfloop transitions, 48 changer transitions 0/220 dead transitions. [2024-06-21 19:34:30,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 220 transitions, 2905 flow [2024-06-21 19:34:30,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:34:30,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:34:30,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 19:34:30,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 19:34:30,191 INFO L175 Difference]: Start difference. First operand has 157 places, 170 transitions, 2137 flow. Second operand 9 states and 164 transitions. [2024-06-21 19:34:30,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 220 transitions, 2905 flow [2024-06-21 19:34:30,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 220 transitions, 2782 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 19:34:30,359 INFO L231 Difference]: Finished difference. Result has 161 places, 177 transitions, 2249 flow [2024-06-21 19:34:30,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2249, PETRI_PLACES=161, PETRI_TRANSITIONS=177} [2024-06-21 19:34:30,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-21 19:34:30,359 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 177 transitions, 2249 flow [2024-06-21 19:34:30,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:30,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:34:30,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:34:30,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 19:34:30,360 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)] === [2024-06-21 19:34:30,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:34:30,361 INFO L85 PathProgramCache]: Analyzing trace with hash 736609937, now seen corresponding path program 8 times [2024-06-21 19:34:30,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:34:30,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149596591] [2024-06-21 19:34:30,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:34:30,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:34:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:34:33,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:34:33,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:34:33,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149596591] [2024-06-21 19:34:33,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149596591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:34:33,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:34:33,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:34:33,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262058592] [2024-06-21 19:34:33,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:34:33,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:34:33,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:34:33,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:34:33,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:34:33,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:34:33,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 177 transitions, 2249 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:33,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:34:33,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:34:33,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:34:34,740 INFO L124 PetriNetUnfolderBase]: 2460/4064 cut-off events. [2024-06-21 19:34:34,740 INFO L125 PetriNetUnfolderBase]: For 72331/72341 co-relation queries the response was YES. [2024-06-21 19:34:34,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22423 conditions, 4064 events. 2460/4064 cut-off events. For 72331/72341 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 24772 event pairs, 633 based on Foata normal form. 20/4079 useless extension candidates. Maximal degree in co-relation 22343. Up to 3477 conditions per place. [2024-06-21 19:34:34,772 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 162 selfloop transitions, 39 changer transitions 0/206 dead transitions. [2024-06-21 19:34:34,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 206 transitions, 2743 flow [2024-06-21 19:34:34,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:34:34,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:34:34,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 19:34:34,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 19:34:34,774 INFO L175 Difference]: Start difference. First operand has 161 places, 177 transitions, 2249 flow. Second operand 8 states and 142 transitions. [2024-06-21 19:34:34,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 206 transitions, 2743 flow [2024-06-21 19:34:34,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 206 transitions, 2645 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 19:34:34,914 INFO L231 Difference]: Finished difference. Result has 163 places, 177 transitions, 2243 flow [2024-06-21 19:34:34,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2151, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2243, PETRI_PLACES=163, PETRI_TRANSITIONS=177} [2024-06-21 19:34:34,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-21 19:34:34,915 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 177 transitions, 2243 flow [2024-06-21 19:34:34,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:34,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:34:34,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:34:34,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 19:34:34,916 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)] === [2024-06-21 19:34:34,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:34:34,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1600688411, now seen corresponding path program 9 times [2024-06-21 19:34:34,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:34:34,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879298703] [2024-06-21 19:34:34,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:34:34,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:34:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:34:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:34:37,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:34:37,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879298703] [2024-06-21 19:34:37,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879298703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:34:37,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:34:37,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:34:37,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855258545] [2024-06-21 19:34:37,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:34:37,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:34:37,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:34:37,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:34:37,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:34:37,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:34:37,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 177 transitions, 2243 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:37,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:34:37,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:34:37,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:34:39,130 INFO L124 PetriNetUnfolderBase]: 2440/4038 cut-off events. [2024-06-21 19:34:39,130 INFO L125 PetriNetUnfolderBase]: For 65588/65598 co-relation queries the response was YES. [2024-06-21 19:34:39,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21869 conditions, 4038 events. 2440/4038 cut-off events. For 65588/65598 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24597 event pairs, 579 based on Foata normal form. 16/4049 useless extension candidates. Maximal degree in co-relation 21789. Up to 3233 conditions per place. [2024-06-21 19:34:39,163 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 165 selfloop transitions, 42 changer transitions 0/212 dead transitions. [2024-06-21 19:34:39,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 212 transitions, 2814 flow [2024-06-21 19:34:39,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:34:39,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:34:39,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 19:34:39,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 19:34:39,165 INFO L175 Difference]: Start difference. First operand has 163 places, 177 transitions, 2243 flow. Second operand 8 states and 143 transitions. [2024-06-21 19:34:39,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 212 transitions, 2814 flow [2024-06-21 19:34:39,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 212 transitions, 2722 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 19:34:39,291 INFO L231 Difference]: Finished difference. Result has 166 places, 180 transitions, 2316 flow [2024-06-21 19:34:39,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2163, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2316, PETRI_PLACES=166, PETRI_TRANSITIONS=180} [2024-06-21 19:34:39,292 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-21 19:34:39,292 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 180 transitions, 2316 flow [2024-06-21 19:34:39,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:39,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:34:39,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:34:39,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 19:34:39,293 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:34:39,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:34:39,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1550898617, now seen corresponding path program 10 times [2024-06-21 19:34:39,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:34:39,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924881148] [2024-06-21 19:34:39,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:34:39,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:34:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:34:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:34:41,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:34:41,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924881148] [2024-06-21 19:34:41,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924881148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:34:41,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:34:41,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:34:41,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993029053] [2024-06-21 19:34:41,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:34:41,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:34:41,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:34:41,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:34:41,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:34:41,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 19:34:41,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 180 transitions, 2316 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:41,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:34:41,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 19:34:41,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:34:43,009 INFO L124 PetriNetUnfolderBase]: 1902/3429 cut-off events. [2024-06-21 19:34:43,010 INFO L125 PetriNetUnfolderBase]: For 57421/57518 co-relation queries the response was YES. [2024-06-21 19:34:43,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18619 conditions, 3429 events. 1902/3429 cut-off events. For 57421/57518 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 22667 event pairs, 217 based on Foata normal form. 67/3404 useless extension candidates. Maximal degree in co-relation 18537. Up to 2080 conditions per place. [2024-06-21 19:34:43,040 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 114 selfloop transitions, 51 changer transitions 0/205 dead transitions. [2024-06-21 19:34:43,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 205 transitions, 2707 flow [2024-06-21 19:34:43,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:34:43,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:34:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 19:34:43,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-21 19:34:43,042 INFO L175 Difference]: Start difference. First operand has 166 places, 180 transitions, 2316 flow. Second operand 7 states and 135 transitions. [2024-06-21 19:34:43,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 205 transitions, 2707 flow [2024-06-21 19:34:43,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 205 transitions, 2659 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 19:34:43,144 INFO L231 Difference]: Finished difference. Result has 169 places, 183 transitions, 2443 flow [2024-06-21 19:34:43,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2214, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2443, PETRI_PLACES=169, PETRI_TRANSITIONS=183} [2024-06-21 19:34:43,144 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-21 19:34:43,144 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 183 transitions, 2443 flow [2024-06-21 19:34:43,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:43,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:34:43,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:34:43,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 19:34:43,146 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:34:43,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:34:43,160 INFO L85 PathProgramCache]: Analyzing trace with hash -26616784, now seen corresponding path program 1 times [2024-06-21 19:34:43,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:34:43,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197931357] [2024-06-21 19:34:43,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:34:43,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:34:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:34:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:34:46,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:34:46,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197931357] [2024-06-21 19:34:46,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197931357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:34:46,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:34:46,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:34:46,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227186121] [2024-06-21 19:34:46,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:34:46,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:34:46,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:34:46,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:34:46,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:34:46,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:34:46,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 183 transitions, 2443 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:46,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:34:46,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:34:46,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:34:48,257 INFO L124 PetriNetUnfolderBase]: 2419/4012 cut-off events. [2024-06-21 19:34:48,257 INFO L125 PetriNetUnfolderBase]: For 63975/63975 co-relation queries the response was YES. [2024-06-21 19:34:48,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22280 conditions, 4012 events. 2419/4012 cut-off events. For 63975/63975 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24576 event pairs, 845 based on Foata normal form. 3/4013 useless extension candidates. Maximal degree in co-relation 22195. Up to 3765 conditions per place. [2024-06-21 19:34:48,288 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 188 selfloop transitions, 27 changer transitions 0/220 dead transitions. [2024-06-21 19:34:48,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 220 transitions, 3084 flow [2024-06-21 19:34:48,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:34:48,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:34:48,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 19:34:48,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 19:34:48,289 INFO L175 Difference]: Start difference. First operand has 169 places, 183 transitions, 2443 flow. Second operand 8 states and 137 transitions. [2024-06-21 19:34:48,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 220 transitions, 3084 flow [2024-06-21 19:34:48,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 220 transitions, 2990 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 19:34:48,407 INFO L231 Difference]: Finished difference. Result has 173 places, 197 transitions, 2563 flow [2024-06-21 19:34:48,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2351, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2563, PETRI_PLACES=173, PETRI_TRANSITIONS=197} [2024-06-21 19:34:48,407 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-21 19:34:48,408 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 197 transitions, 2563 flow [2024-06-21 19:34:48,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:48,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:34:48,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:34:48,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 19:34:48,408 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:34:48,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:34:48,409 INFO L85 PathProgramCache]: Analyzing trace with hash -403446252, now seen corresponding path program 1 times [2024-06-21 19:34:48,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:34:48,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379130236] [2024-06-21 19:34:48,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:34:48,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:34:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:34:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:34:51,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:34:51,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379130236] [2024-06-21 19:34:51,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379130236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:34:51,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:34:51,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:34:51,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729813972] [2024-06-21 19:34:51,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:34:51,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:34:51,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:34:51,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:34:51,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:34:51,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:34:51,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 197 transitions, 2563 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:51,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:34:51,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:34:51,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:34:53,134 INFO L124 PetriNetUnfolderBase]: 2429/4029 cut-off events. [2024-06-21 19:34:53,135 INFO L125 PetriNetUnfolderBase]: For 60907/60923 co-relation queries the response was YES. [2024-06-21 19:34:53,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22430 conditions, 4029 events. 2429/4029 cut-off events. For 60907/60923 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24755 event pairs, 854 based on Foata normal form. 16/4042 useless extension candidates. Maximal degree in co-relation 22346. Up to 3690 conditions per place. [2024-06-21 19:34:53,171 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 188 selfloop transitions, 33 changer transitions 0/226 dead transitions. [2024-06-21 19:34:53,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 226 transitions, 3211 flow [2024-06-21 19:34:53,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:34:53,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:34:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 19:34:53,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 19:34:53,173 INFO L175 Difference]: Start difference. First operand has 173 places, 197 transitions, 2563 flow. Second operand 7 states and 125 transitions. [2024-06-21 19:34:53,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 226 transitions, 3211 flow [2024-06-21 19:34:53,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 226 transitions, 3142 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-21 19:34:53,304 INFO L231 Difference]: Finished difference. Result has 178 places, 203 transitions, 2646 flow [2024-06-21 19:34:53,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2497, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2646, PETRI_PLACES=178, PETRI_TRANSITIONS=203} [2024-06-21 19:34:53,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-21 19:34:53,304 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 203 transitions, 2646 flow [2024-06-21 19:34:53,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:53,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:34:53,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:34:53,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 19:34:53,305 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:34:53,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:34:53,305 INFO L85 PathProgramCache]: Analyzing trace with hash -403326282, now seen corresponding path program 2 times [2024-06-21 19:34:53,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:34:53,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457291520] [2024-06-21 19:34:53,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:34:53,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:34:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:34:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:34:56,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:34:56,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457291520] [2024-06-21 19:34:56,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457291520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:34:56,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:34:56,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:34:56,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784983188] [2024-06-21 19:34:56,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:34:56,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:34:56,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:34:56,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:34:56,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:34:56,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:34:56,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 203 transitions, 2646 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:56,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:34:56,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:34:56,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:34:57,689 INFO L124 PetriNetUnfolderBase]: 2454/4070 cut-off events. [2024-06-21 19:34:57,689 INFO L125 PetriNetUnfolderBase]: For 62782/62798 co-relation queries the response was YES. [2024-06-21 19:34:57,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23038 conditions, 4070 events. 2454/4070 cut-off events. For 62782/62798 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25030 event pairs, 854 based on Foata normal form. 16/4083 useless extension candidates. Maximal degree in co-relation 22951. Up to 3772 conditions per place. [2024-06-21 19:34:57,723 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 193 selfloop transitions, 31 changer transitions 0/229 dead transitions. [2024-06-21 19:34:57,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 229 transitions, 3271 flow [2024-06-21 19:34:57,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:34:57,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:34:57,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 19:34:57,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-21 19:34:57,728 INFO L175 Difference]: Start difference. First operand has 178 places, 203 transitions, 2646 flow. Second operand 8 states and 127 transitions. [2024-06-21 19:34:57,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 229 transitions, 3271 flow [2024-06-21 19:34:57,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 229 transitions, 3223 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 19:34:57,838 INFO L231 Difference]: Finished difference. Result has 183 places, 211 transitions, 2780 flow [2024-06-21 19:34:57,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2607, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2780, PETRI_PLACES=183, PETRI_TRANSITIONS=211} [2024-06-21 19:34:57,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-21 19:34:57,839 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 211 transitions, 2780 flow [2024-06-21 19:34:57,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:34:57,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:34:57,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:34:57,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 19:34:57,839 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:34:57,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:34:57,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1220568842, now seen corresponding path program 3 times [2024-06-21 19:34:57,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:34:57,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399810397] [2024-06-21 19:34:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:34:57,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:34:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:35:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:35:00,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:35:00,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399810397] [2024-06-21 19:35:00,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399810397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:35:00,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:35:00,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:35:00,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992862722] [2024-06-21 19:35:00,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:35:00,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:35:00,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:35:00,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:35:00,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:35:00,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:35:00,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 211 transitions, 2780 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:00,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:35:00,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:35:00,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:35:02,168 INFO L124 PetriNetUnfolderBase]: 2448/4063 cut-off events. [2024-06-21 19:35:02,169 INFO L125 PetriNetUnfolderBase]: For 66167/66218 co-relation queries the response was YES. [2024-06-21 19:35:02,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23131 conditions, 4063 events. 2448/4063 cut-off events. For 66167/66218 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25053 event pairs, 867 based on Foata normal form. 33/4090 useless extension candidates. Maximal degree in co-relation 23042. Up to 3754 conditions per place. [2024-06-21 19:35:02,199 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 33 changer transitions 0/228 dead transitions. [2024-06-21 19:35:02,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 228 transitions, 3309 flow [2024-06-21 19:35:02,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:35:02,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:35:02,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-21 19:35:02,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-21 19:35:02,201 INFO L175 Difference]: Start difference. First operand has 183 places, 211 transitions, 2780 flow. Second operand 9 states and 136 transitions. [2024-06-21 19:35:02,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 228 transitions, 3309 flow [2024-06-21 19:35:02,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 228 transitions, 3218 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 19:35:02,319 INFO L231 Difference]: Finished difference. Result has 187 places, 211 transitions, 2762 flow [2024-06-21 19:35:02,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2689, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2762, PETRI_PLACES=187, PETRI_TRANSITIONS=211} [2024-06-21 19:35:02,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-21 19:35:02,320 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 211 transitions, 2762 flow [2024-06-21 19:35:02,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:02,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:35:02,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:35:02,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 19:35:02,320 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)] === [2024-06-21 19:35:02,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:35:02,321 INFO L85 PathProgramCache]: Analyzing trace with hash -825118613, now seen corresponding path program 1 times [2024-06-21 19:35:02,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:35:02,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511684789] [2024-06-21 19:35:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:35:02,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:35:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:35:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:35:06,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:35:06,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511684789] [2024-06-21 19:35:06,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511684789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:35:06,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:35:06,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:35:06,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059792278] [2024-06-21 19:35:06,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:35:06,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:35:06,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:35:06,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:35:06,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:35:06,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:35:06,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 211 transitions, 2762 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:06,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:35:06,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:35:06,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:35:08,825 INFO L124 PetriNetUnfolderBase]: 2447/4049 cut-off events. [2024-06-21 19:35:08,825 INFO L125 PetriNetUnfolderBase]: For 65450/65450 co-relation queries the response was YES. [2024-06-21 19:35:08,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23129 conditions, 4049 events. 2447/4049 cut-off events. For 65450/65450 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 24703 event pairs, 647 based on Foata normal form. 3/4050 useless extension candidates. Maximal degree in co-relation 23039. Up to 3744 conditions per place. [2024-06-21 19:35:08,863 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 189 selfloop transitions, 57 changer transitions 0/251 dead transitions. [2024-06-21 19:35:08,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 251 transitions, 3488 flow [2024-06-21 19:35:08,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:35:08,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:35:08,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 187 transitions. [2024-06-21 19:35:08,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37103174603174605 [2024-06-21 19:35:08,865 INFO L175 Difference]: Start difference. First operand has 187 places, 211 transitions, 2762 flow. Second operand 12 states and 187 transitions. [2024-06-21 19:35:08,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 251 transitions, 3488 flow [2024-06-21 19:35:08,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 251 transitions, 3370 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 19:35:08,991 INFO L231 Difference]: Finished difference. Result has 192 places, 225 transitions, 2950 flow [2024-06-21 19:35:08,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2649, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2950, PETRI_PLACES=192, PETRI_TRANSITIONS=225} [2024-06-21 19:35:08,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-21 19:35:08,992 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 225 transitions, 2950 flow [2024-06-21 19:35:08,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:08,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:35:08,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:35:08,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 19:35:08,993 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:35:08,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:35:08,993 INFO L85 PathProgramCache]: Analyzing trace with hash -2032120039, now seen corresponding path program 1 times [2024-06-21 19:35:08,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:35:08,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938278934] [2024-06-21 19:35:08,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:35:08,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:35:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:35:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:35:12,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:35:12,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938278934] [2024-06-21 19:35:12,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938278934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:35:12,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:35:12,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:35:12,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486299315] [2024-06-21 19:35:12,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:35:12,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:35:12,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:35:12,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:35:12,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:35:12,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:35:12,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 225 transitions, 2950 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:12,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:35:12,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:35:12,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:35:14,370 INFO L124 PetriNetUnfolderBase]: 2460/4075 cut-off events. [2024-06-21 19:35:14,370 INFO L125 PetriNetUnfolderBase]: For 73022/73022 co-relation queries the response was YES. [2024-06-21 19:35:14,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23983 conditions, 4075 events. 2460/4075 cut-off events. For 73022/73022 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 24882 event pairs, 822 based on Foata normal form. 1/4074 useless extension candidates. Maximal degree in co-relation 23892. Up to 3791 conditions per place. [2024-06-21 19:35:14,400 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 237 selfloop transitions, 35 changer transitions 0/277 dead transitions. [2024-06-21 19:35:14,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 277 transitions, 4019 flow [2024-06-21 19:35:14,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:35:14,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:35:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 19:35:14,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 19:35:14,402 INFO L175 Difference]: Start difference. First operand has 192 places, 225 transitions, 2950 flow. Second operand 8 states and 140 transitions. [2024-06-21 19:35:14,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 277 transitions, 4019 flow [2024-06-21 19:35:14,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 277 transitions, 3910 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 19:35:14,522 INFO L231 Difference]: Finished difference. Result has 198 places, 247 transitions, 3251 flow [2024-06-21 19:35:14,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2843, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3251, PETRI_PLACES=198, PETRI_TRANSITIONS=247} [2024-06-21 19:35:14,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-21 19:35:14,522 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 247 transitions, 3251 flow [2024-06-21 19:35:14,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:14,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:35:14,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:35:14,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 19:35:14,523 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:35:14,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:35:14,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2028395389, now seen corresponding path program 2 times [2024-06-21 19:35:14,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:35:14,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327631503] [2024-06-21 19:35:14,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:35:14,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:35:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:35:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:35:17,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:35:17,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327631503] [2024-06-21 19:35:17,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327631503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:35:17,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:35:17,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:35:17,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320280722] [2024-06-21 19:35:17,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:35:17,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:35:17,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:35:17,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:35:17,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:35:17,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:35:17,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 247 transitions, 3251 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:17,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:35:17,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:35:17,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:35:19,879 INFO L124 PetriNetUnfolderBase]: 2491/4118 cut-off events. [2024-06-21 19:35:19,880 INFO L125 PetriNetUnfolderBase]: For 79233/79233 co-relation queries the response was YES. [2024-06-21 19:35:19,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25011 conditions, 4118 events. 2491/4118 cut-off events. For 79233/79233 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25161 event pairs, 833 based on Foata normal form. 1/4117 useless extension candidates. Maximal degree in co-relation 24914. Up to 3853 conditions per place. [2024-06-21 19:35:19,920 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 245 selfloop transitions, 39 changer transitions 0/289 dead transitions. [2024-06-21 19:35:19,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 289 transitions, 4299 flow [2024-06-21 19:35:19,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:35:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:35:19,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-21 19:35:19,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3593073593073593 [2024-06-21 19:35:19,922 INFO L175 Difference]: Start difference. First operand has 198 places, 247 transitions, 3251 flow. Second operand 11 states and 166 transitions. [2024-06-21 19:35:19,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 289 transitions, 4299 flow [2024-06-21 19:35:20,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 289 transitions, 4199 flow, removed 50 selfloop flow, removed 0 redundant places. [2024-06-21 19:35:20,108 INFO L231 Difference]: Finished difference. Result has 214 places, 266 transitions, 3565 flow [2024-06-21 19:35:20,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3193, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3565, PETRI_PLACES=214, PETRI_TRANSITIONS=266} [2024-06-21 19:35:20,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-21 19:35:20,109 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 266 transitions, 3565 flow [2024-06-21 19:35:20,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:20,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:35:20,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:35:20,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 19:35:20,109 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:35:20,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:35:20,110 INFO L85 PathProgramCache]: Analyzing trace with hash -2028400969, now seen corresponding path program 3 times [2024-06-21 19:35:20,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:35:20,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042677036] [2024-06-21 19:35:20,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:35:20,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:35:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:35:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:35:23,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:35:23,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042677036] [2024-06-21 19:35:23,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042677036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:35:23,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:35:23,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:35:23,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108398880] [2024-06-21 19:35:23,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:35:23,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:35:23,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:35:23,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:35:23,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:35:23,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:35:23,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 266 transitions, 3565 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:23,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:35:23,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:35:23,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:35:25,375 INFO L124 PetriNetUnfolderBase]: 2488/4120 cut-off events. [2024-06-21 19:35:25,376 INFO L125 PetriNetUnfolderBase]: For 83174/83174 co-relation queries the response was YES. [2024-06-21 19:35:25,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25363 conditions, 4120 events. 2488/4120 cut-off events. For 83174/83174 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25246 event pairs, 833 based on Foata normal form. 1/4119 useless extension candidates. Maximal degree in co-relation 25257. Up to 3851 conditions per place. [2024-06-21 19:35:25,413 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 245 selfloop transitions, 36 changer transitions 0/286 dead transitions. [2024-06-21 19:35:25,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 286 transitions, 4275 flow [2024-06-21 19:35:25,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:35:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:35:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 19:35:25,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-21 19:35:25,424 INFO L175 Difference]: Start difference. First operand has 214 places, 266 transitions, 3565 flow. Second operand 9 states and 143 transitions. [2024-06-21 19:35:25,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 286 transitions, 4275 flow [2024-06-21 19:35:25,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 286 transitions, 4169 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 19:35:25,621 INFO L231 Difference]: Finished difference. Result has 219 places, 266 transitions, 3537 flow [2024-06-21 19:35:25,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3459, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3537, PETRI_PLACES=219, PETRI_TRANSITIONS=266} [2024-06-21 19:35:25,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-21 19:35:25,623 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 266 transitions, 3537 flow [2024-06-21 19:35:25,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:25,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:35:25,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:35:25,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 19:35:25,624 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:35:25,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:35:25,624 INFO L85 PathProgramCache]: Analyzing trace with hash 817079205, now seen corresponding path program 4 times [2024-06-21 19:35:25,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:35:25,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114003932] [2024-06-21 19:35:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:35:25,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:35:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:35:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:35:29,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:35:29,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114003932] [2024-06-21 19:35:29,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114003932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:35:29,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:35:29,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:35:29,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899302950] [2024-06-21 19:35:29,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:35:29,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:35:29,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:35:29,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:35:29,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:35:29,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:35:29,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 266 transitions, 3537 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:29,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:35:29,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:35:29,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:35:30,869 INFO L124 PetriNetUnfolderBase]: 2506/4142 cut-off events. [2024-06-21 19:35:30,869 INFO L125 PetriNetUnfolderBase]: For 87876/87891 co-relation queries the response was YES. [2024-06-21 19:35:30,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25723 conditions, 4142 events. 2506/4142 cut-off events. For 87876/87891 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25338 event pairs, 835 based on Foata normal form. 11/4150 useless extension candidates. Maximal degree in co-relation 25615. Up to 3847 conditions per place. [2024-06-21 19:35:30,914 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 244 selfloop transitions, 49 changer transitions 0/298 dead transitions. [2024-06-21 19:35:30,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 298 transitions, 4575 flow [2024-06-21 19:35:30,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:35:30,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:35:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 177 transitions. [2024-06-21 19:35:30,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-21 19:35:30,917 INFO L175 Difference]: Start difference. First operand has 219 places, 266 transitions, 3537 flow. Second operand 12 states and 177 transitions. [2024-06-21 19:35:30,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 298 transitions, 4575 flow [2024-06-21 19:35:31,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 298 transitions, 4518 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 19:35:31,195 INFO L231 Difference]: Finished difference. Result has 229 places, 277 transitions, 3780 flow [2024-06-21 19:35:31,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3780, PETRI_PLACES=229, PETRI_TRANSITIONS=277} [2024-06-21 19:35:31,196 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-21 19:35:31,196 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 277 transitions, 3780 flow [2024-06-21 19:35:31,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:31,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:35:31,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:35:31,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 19:35:31,197 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)] === [2024-06-21 19:35:31,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:35:31,197 INFO L85 PathProgramCache]: Analyzing trace with hash -832291145, now seen corresponding path program 5 times [2024-06-21 19:35:31,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:35:31,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499104832] [2024-06-21 19:35:31,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:35:31,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:35:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:35:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:35:34,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:35:34,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499104832] [2024-06-21 19:35:34,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499104832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:35:34,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:35:34,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:35:34,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577963319] [2024-06-21 19:35:34,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:35:34,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:35:34,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:35:34,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:35:34,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:35:34,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:35:34,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 277 transitions, 3780 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:34,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:35:34,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:35:34,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:35:36,378 INFO L124 PetriNetUnfolderBase]: 2503/4144 cut-off events. [2024-06-21 19:35:36,378 INFO L125 PetriNetUnfolderBase]: For 93425/93440 co-relation queries the response was YES. [2024-06-21 19:35:36,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26227 conditions, 4144 events. 2503/4144 cut-off events. For 93425/93440 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25385 event pairs, 835 based on Foata normal form. 11/4152 useless extension candidates. Maximal degree in co-relation 26114. Up to 3845 conditions per place. [2024-06-21 19:35:36,425 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 244 selfloop transitions, 46 changer transitions 0/295 dead transitions. [2024-06-21 19:35:36,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 295 transitions, 4600 flow [2024-06-21 19:35:36,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:35:36,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:35:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-21 19:35:36,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-06-21 19:35:36,427 INFO L175 Difference]: Start difference. First operand has 229 places, 277 transitions, 3780 flow. Second operand 10 states and 152 transitions. [2024-06-21 19:35:36,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 295 transitions, 4600 flow [2024-06-21 19:35:36,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 295 transitions, 4427 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-21 19:35:36,654 INFO L231 Difference]: Finished difference. Result has 234 places, 277 transitions, 3705 flow [2024-06-21 19:35:36,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3607, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3705, PETRI_PLACES=234, PETRI_TRANSITIONS=277} [2024-06-21 19:35:36,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-21 19:35:36,655 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 277 transitions, 3705 flow [2024-06-21 19:35:36,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:36,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:35:36,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:35:36,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 19:35:36,656 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:35:36,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:35:36,656 INFO L85 PathProgramCache]: Analyzing trace with hash -824933915, now seen corresponding path program 6 times [2024-06-21 19:35:36,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:35:36,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362459467] [2024-06-21 19:35:36,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:35:36,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:35:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:35:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:35:40,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:35:40,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362459467] [2024-06-21 19:35:40,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362459467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:35:40,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:35:40,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:35:40,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961786339] [2024-06-21 19:35:40,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:35:40,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:35:40,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:35:40,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:35:40,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:35:40,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:35:40,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 277 transitions, 3705 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:40,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:35:40,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:35:40,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:35:42,392 INFO L124 PetriNetUnfolderBase]: 2500/4136 cut-off events. [2024-06-21 19:35:42,392 INFO L125 PetriNetUnfolderBase]: For 96218/96233 co-relation queries the response was YES. [2024-06-21 19:35:42,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26097 conditions, 4136 events. 2500/4136 cut-off events. For 96218/96233 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25332 event pairs, 841 based on Foata normal form. 11/4144 useless extension candidates. Maximal degree in co-relation 25984. Up to 3843 conditions per place. [2024-06-21 19:35:42,434 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 234 selfloop transitions, 62 changer transitions 0/301 dead transitions. [2024-06-21 19:35:42,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 301 transitions, 4587 flow [2024-06-21 19:35:42,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:35:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:35:42,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 158 transitions. [2024-06-21 19:35:42,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.341991341991342 [2024-06-21 19:35:42,438 INFO L175 Difference]: Start difference. First operand has 234 places, 277 transitions, 3705 flow. Second operand 11 states and 158 transitions. [2024-06-21 19:35:42,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 301 transitions, 4587 flow [2024-06-21 19:35:42,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 301 transitions, 4495 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 19:35:42,683 INFO L231 Difference]: Finished difference. Result has 238 places, 286 transitions, 3943 flow [2024-06-21 19:35:42,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3623, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3943, PETRI_PLACES=238, PETRI_TRANSITIONS=286} [2024-06-21 19:35:42,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-21 19:35:42,683 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 286 transitions, 3943 flow [2024-06-21 19:35:42,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:42,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:35:42,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:35:42,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 19:35:42,684 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:35:42,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:35:42,685 INFO L85 PathProgramCache]: Analyzing trace with hash 247821009, now seen corresponding path program 1 times [2024-06-21 19:35:42,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:35:42,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884363419] [2024-06-21 19:35:42,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:35:42,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:35:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:35:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:35:48,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:35:48,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884363419] [2024-06-21 19:35:48,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884363419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:35:48,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:35:48,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:35:48,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131928147] [2024-06-21 19:35:48,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:35:48,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:35:48,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:35:48,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:35:48,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:35:48,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:35:48,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 286 transitions, 3943 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:48,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:35:48,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:35:48,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:35:49,824 INFO L124 PetriNetUnfolderBase]: 2518/4170 cut-off events. [2024-06-21 19:35:49,824 INFO L125 PetriNetUnfolderBase]: For 102066/102076 co-relation queries the response was YES. [2024-06-21 19:35:49,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26559 conditions, 4170 events. 2518/4170 cut-off events. For 102066/102076 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25607 event pairs, 836 based on Foata normal form. 9/4176 useless extension candidates. Maximal degree in co-relation 26444. Up to 3853 conditions per place. [2024-06-21 19:35:49,875 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 267 selfloop transitions, 50 changer transitions 0/322 dead transitions. [2024-06-21 19:35:49,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 322 transitions, 4938 flow [2024-06-21 19:35:49,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:35:49,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:35:49,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-21 19:35:49,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-21 19:35:49,877 INFO L175 Difference]: Start difference. First operand has 238 places, 286 transitions, 3943 flow. Second operand 10 states and 161 transitions. [2024-06-21 19:35:49,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 322 transitions, 4938 flow [2024-06-21 19:35:50,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 322 transitions, 4809 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 19:35:50,204 INFO L231 Difference]: Finished difference. Result has 242 places, 297 transitions, 4063 flow [2024-06-21 19:35:50,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3830, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4063, PETRI_PLACES=242, PETRI_TRANSITIONS=297} [2024-06-21 19:35:50,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-21 19:35:50,205 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 297 transitions, 4063 flow [2024-06-21 19:35:50,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:50,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:35:50,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:35:50,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 19:35:50,206 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:35:50,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:35:50,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1543830643, now seen corresponding path program 2 times [2024-06-21 19:35:50,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:35:50,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532099922] [2024-06-21 19:35:50,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:35:50,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:35:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:35:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:35:55,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:35:55,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532099922] [2024-06-21 19:35:55,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532099922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:35:55,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:35:55,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:35:55,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137845209] [2024-06-21 19:35:55,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:35:55,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:35:55,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:35:55,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:35:55,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:35:55,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:35:55,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 297 transitions, 4063 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:55,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:35:55,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:35:55,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:35:56,873 INFO L124 PetriNetUnfolderBase]: 2531/4192 cut-off events. [2024-06-21 19:35:56,873 INFO L125 PetriNetUnfolderBase]: For 103255/103265 co-relation queries the response was YES. [2024-06-21 19:35:56,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26554 conditions, 4192 events. 2531/4192 cut-off events. For 103255/103265 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25804 event pairs, 837 based on Foata normal form. 9/4198 useless extension candidates. Maximal degree in co-relation 26439. Up to 3882 conditions per place. [2024-06-21 19:35:56,916 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 269 selfloop transitions, 47 changer transitions 0/321 dead transitions. [2024-06-21 19:35:56,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 321 transitions, 4896 flow [2024-06-21 19:35:56,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:35:56,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:35:56,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-21 19:35:56,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3595238095238095 [2024-06-21 19:35:56,918 INFO L175 Difference]: Start difference. First operand has 242 places, 297 transitions, 4063 flow. Second operand 10 states and 151 transitions. [2024-06-21 19:35:56,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 321 transitions, 4896 flow [2024-06-21 19:35:57,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 321 transitions, 4776 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-21 19:35:57,121 INFO L231 Difference]: Finished difference. Result has 250 places, 303 transitions, 4138 flow [2024-06-21 19:35:57,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3950, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4138, PETRI_PLACES=250, PETRI_TRANSITIONS=303} [2024-06-21 19:35:57,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 19:35:57,122 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 303 transitions, 4138 flow [2024-06-21 19:35:57,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:35:57,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:35:57,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:35:57,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 19:35:57,123 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:35:57,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:35:57,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1049269457, now seen corresponding path program 3 times [2024-06-21 19:35:57,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:35:57,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775420183] [2024-06-21 19:35:57,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:35:57,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:35:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:01,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:01,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775420183] [2024-06-21 19:36:01,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775420183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:01,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:01,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:36:01,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421126753] [2024-06-21 19:36:01,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:01,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:36:01,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:01,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:36:01,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:36:01,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:36:01,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 303 transitions, 4138 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:01,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:01,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:36:01,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:03,144 INFO L124 PetriNetUnfolderBase]: 2556/4225 cut-off events. [2024-06-21 19:36:03,145 INFO L125 PetriNetUnfolderBase]: For 108211/108211 co-relation queries the response was YES. [2024-06-21 19:36:03,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26953 conditions, 4225 events. 2556/4225 cut-off events. For 108211/108211 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 25915 event pairs, 824 based on Foata normal form. 3/4226 useless extension candidates. Maximal degree in co-relation 26836. Up to 3817 conditions per place. [2024-06-21 19:36:03,194 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 250 selfloop transitions, 101 changer transitions 0/356 dead transitions. [2024-06-21 19:36:03,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 356 transitions, 5366 flow [2024-06-21 19:36:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:36:03,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:36:03,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 205 transitions. [2024-06-21 19:36:03,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40674603174603174 [2024-06-21 19:36:03,201 INFO L175 Difference]: Start difference. First operand has 250 places, 303 transitions, 4138 flow. Second operand 12 states and 205 transitions. [2024-06-21 19:36:03,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 356 transitions, 5366 flow [2024-06-21 19:36:03,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 356 transitions, 5288 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 19:36:03,462 INFO L231 Difference]: Finished difference. Result has 259 places, 321 transitions, 4572 flow [2024-06-21 19:36:03,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4060, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4572, PETRI_PLACES=259, PETRI_TRANSITIONS=321} [2024-06-21 19:36:03,464 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-21 19:36:03,464 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 321 transitions, 4572 flow [2024-06-21 19:36:03,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:03,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:03,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:03,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 19:36:03,465 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:36:03,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:03,465 INFO L85 PathProgramCache]: Analyzing trace with hash -212453299, now seen corresponding path program 4 times [2024-06-21 19:36:03,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:03,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445610564] [2024-06-21 19:36:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:03,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:07,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:07,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445610564] [2024-06-21 19:36:07,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445610564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:07,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:07,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:36:07,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162714532] [2024-06-21 19:36:07,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:07,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:36:07,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:07,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:36:07,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:36:07,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:36:07,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 321 transitions, 4572 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:07,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:07,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:36:07,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:09,476 INFO L124 PetriNetUnfolderBase]: 2605/4290 cut-off events. [2024-06-21 19:36:09,476 INFO L125 PetriNetUnfolderBase]: For 123714/123723 co-relation queries the response was YES. [2024-06-21 19:36:09,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28568 conditions, 4290 events. 2605/4290 cut-off events. For 123714/123723 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 26288 event pairs, 818 based on Foata normal form. 9/4296 useless extension candidates. Maximal degree in co-relation 28447. Up to 3865 conditions per place. [2024-06-21 19:36:09,517 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 239 selfloop transitions, 128 changer transitions 0/372 dead transitions. [2024-06-21 19:36:09,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 372 transitions, 6046 flow [2024-06-21 19:36:09,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:36:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:36:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-21 19:36:09,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 19:36:09,521 INFO L175 Difference]: Start difference. First operand has 259 places, 321 transitions, 4572 flow. Second operand 12 states and 195 transitions. [2024-06-21 19:36:09,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 372 transitions, 6046 flow [2024-06-21 19:36:09,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 372 transitions, 5743 flow, removed 98 selfloop flow, removed 7 redundant places. [2024-06-21 19:36:09,767 INFO L231 Difference]: Finished difference. Result has 265 places, 345 transitions, 4973 flow [2024-06-21 19:36:09,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4322, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4973, PETRI_PLACES=265, PETRI_TRANSITIONS=345} [2024-06-21 19:36:09,768 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-21 19:36:09,768 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 345 transitions, 4973 flow [2024-06-21 19:36:09,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:09,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:09,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:09,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 19:36:09,769 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:36:09,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:09,769 INFO L85 PathProgramCache]: Analyzing trace with hash 710875539, now seen corresponding path program 5 times [2024-06-21 19:36:09,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:09,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488467865] [2024-06-21 19:36:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:09,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:14,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:14,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488467865] [2024-06-21 19:36:14,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488467865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:14,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:14,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:36:14,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522819533] [2024-06-21 19:36:14,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:14,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:36:14,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:14,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:36:14,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:36:14,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:36:14,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 345 transitions, 4973 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:14,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:14,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:36:14,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:17,294 INFO L124 PetriNetUnfolderBase]: 2606/4294 cut-off events. [2024-06-21 19:36:17,294 INFO L125 PetriNetUnfolderBase]: For 131597/131606 co-relation queries the response was YES. [2024-06-21 19:36:17,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28788 conditions, 4294 events. 2606/4294 cut-off events. For 131597/131606 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 26314 event pairs, 818 based on Foata normal form. 9/4300 useless extension candidates. Maximal degree in co-relation 28667. Up to 3869 conditions per place. [2024-06-21 19:36:17,348 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 241 selfloop transitions, 135 changer transitions 0/381 dead transitions. [2024-06-21 19:36:17,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 381 transitions, 6273 flow [2024-06-21 19:36:17,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:36:17,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:36:17,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 196 transitions. [2024-06-21 19:36:17,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 19:36:17,350 INFO L175 Difference]: Start difference. First operand has 265 places, 345 transitions, 4973 flow. Second operand 12 states and 196 transitions. [2024-06-21 19:36:17,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 381 transitions, 6273 flow [2024-06-21 19:36:17,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 381 transitions, 6099 flow, removed 76 selfloop flow, removed 2 redundant places. [2024-06-21 19:36:17,941 INFO L231 Difference]: Finished difference. Result has 277 places, 354 transitions, 5330 flow [2024-06-21 19:36:17,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4823, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5330, PETRI_PLACES=277, PETRI_TRANSITIONS=354} [2024-06-21 19:36:17,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-21 19:36:17,941 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 354 transitions, 5330 flow [2024-06-21 19:36:17,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:17,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:17,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:17,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 19:36:17,942 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:36:17,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:17,943 INFO L85 PathProgramCache]: Analyzing trace with hash -31054767, now seen corresponding path program 6 times [2024-06-21 19:36:17,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:17,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920699089] [2024-06-21 19:36:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:17,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:23,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:23,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920699089] [2024-06-21 19:36:23,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920699089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:23,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:23,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:36:23,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718560706] [2024-06-21 19:36:23,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:23,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:36:23,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:23,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:36:23,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:36:23,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:36:23,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 354 transitions, 5330 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:23,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:23,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:36:23,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:26,356 INFO L124 PetriNetUnfolderBase]: 2600/4280 cut-off events. [2024-06-21 19:36:26,356 INFO L125 PetriNetUnfolderBase]: For 140987/140996 co-relation queries the response was YES. [2024-06-21 19:36:26,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28975 conditions, 4280 events. 2600/4280 cut-off events. For 140987/140996 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 26168 event pairs, 819 based on Foata normal form. 9/4286 useless extension candidates. Maximal degree in co-relation 28850. Up to 3864 conditions per place. [2024-06-21 19:36:26,406 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 123 changer transitions 0/378 dead transitions. [2024-06-21 19:36:26,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 378 transitions, 6233 flow [2024-06-21 19:36:26,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:36:26,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:36:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-21 19:36:26,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 19:36:26,409 INFO L175 Difference]: Start difference. First operand has 277 places, 354 transitions, 5330 flow. Second operand 12 states and 192 transitions. [2024-06-21 19:36:26,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 378 transitions, 6233 flow [2024-06-21 19:36:26,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 378 transitions, 5955 flow, removed 61 selfloop flow, removed 8 redundant places. [2024-06-21 19:36:26,761 INFO L231 Difference]: Finished difference. Result has 281 places, 353 transitions, 5235 flow [2024-06-21 19:36:26,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4926, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5235, PETRI_PLACES=281, PETRI_TRANSITIONS=353} [2024-06-21 19:36:26,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-21 19:36:26,762 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 353 transitions, 5235 flow [2024-06-21 19:36:26,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:26,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:26,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:26,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 19:36:26,762 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)] === [2024-06-21 19:36:26,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:26,763 INFO L85 PathProgramCache]: Analyzing trace with hash -31470477, now seen corresponding path program 7 times [2024-06-21 19:36:26,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:26,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007543589] [2024-06-21 19:36:26,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:26,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:32,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:32,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:32,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007543589] [2024-06-21 19:36:32,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007543589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:32,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:32,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:36:32,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728452907] [2024-06-21 19:36:32,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:32,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:36:32,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:32,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:36:32,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:36:32,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:36:32,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 353 transitions, 5235 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:32,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:32,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:36:32,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:34,218 INFO L124 PetriNetUnfolderBase]: 2592/4273 cut-off events. [2024-06-21 19:36:34,218 INFO L125 PetriNetUnfolderBase]: For 129989/130028 co-relation queries the response was YES. [2024-06-21 19:36:34,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28534 conditions, 4273 events. 2592/4273 cut-off events. For 129989/130028 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 26209 event pairs, 844 based on Foata normal form. 24/4291 useless extension candidates. Maximal degree in co-relation 28411. Up to 3967 conditions per place. [2024-06-21 19:36:34,266 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 316 selfloop transitions, 47 changer transitions 0/368 dead transitions. [2024-06-21 19:36:34,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 368 transitions, 6107 flow [2024-06-21 19:36:34,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:36:34,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:36:34,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-21 19:36:34,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-21 19:36:34,277 INFO L175 Difference]: Start difference. First operand has 281 places, 353 transitions, 5235 flow. Second operand 9 states and 139 transitions. [2024-06-21 19:36:34,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 368 transitions, 6107 flow [2024-06-21 19:36:34,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 368 transitions, 5878 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 19:36:34,668 INFO L231 Difference]: Finished difference. Result has 283 places, 354 transitions, 5134 flow [2024-06-21 19:36:34,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5018, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5134, PETRI_PLACES=283, PETRI_TRANSITIONS=354} [2024-06-21 19:36:34,669 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-21 19:36:34,669 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 354 transitions, 5134 flow [2024-06-21 19:36:34,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:34,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:34,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:34,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 19:36:34,669 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)] === [2024-06-21 19:36:34,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:34,671 INFO L85 PathProgramCache]: Analyzing trace with hash 191141391, now seen corresponding path program 1 times [2024-06-21 19:36:34,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:34,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483213622] [2024-06-21 19:36:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:34,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:42,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:42,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483213622] [2024-06-21 19:36:42,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483213622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:42,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:42,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:36:42,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223120904] [2024-06-21 19:36:42,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:42,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:36:42,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:42,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:36:42,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:36:42,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:36:42,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 354 transitions, 5134 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-21 19:36:42,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:42,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:36:42,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:44,021 INFO L124 PetriNetUnfolderBase]: 2521/4176 cut-off events. [2024-06-21 19:36:44,021 INFO L125 PetriNetUnfolderBase]: For 139478/139478 co-relation queries the response was YES. [2024-06-21 19:36:44,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27731 conditions, 4176 events. 2521/4176 cut-off events. For 139478/139478 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 25614 event pairs, 618 based on Foata normal form. 12/4156 useless extension candidates. Maximal degree in co-relation 27608. Up to 3674 conditions per place. [2024-06-21 19:36:44,079 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 276 selfloop transitions, 55 changer transitions 0/382 dead transitions. [2024-06-21 19:36:44,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 382 transitions, 5922 flow [2024-06-21 19:36:44,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:36:44,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:36:44,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 19:36:44,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:36:44,080 INFO L175 Difference]: Start difference. First operand has 283 places, 354 transitions, 5134 flow. Second operand 10 states and 170 transitions. [2024-06-21 19:36:44,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 382 transitions, 5922 flow [2024-06-21 19:36:44,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 382 transitions, 5826 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 19:36:44,385 INFO L231 Difference]: Finished difference. Result has 288 places, 355 transitions, 5177 flow [2024-06-21 19:36:44,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5038, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5177, PETRI_PLACES=288, PETRI_TRANSITIONS=355} [2024-06-21 19:36:44,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-21 19:36:44,386 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 355 transitions, 5177 flow [2024-06-21 19:36:44,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-21 19:36:44,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:44,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:44,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 19:36:44,386 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)] === [2024-06-21 19:36:44,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:44,387 INFO L85 PathProgramCache]: Analyzing trace with hash 205426191, now seen corresponding path program 2 times [2024-06-21 19:36:44,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:44,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121646069] [2024-06-21 19:36:44,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:44,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:49,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:49,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121646069] [2024-06-21 19:36:49,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121646069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:49,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:49,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:36:49,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713820994] [2024-06-21 19:36:49,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:49,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:36:49,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:49,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:36:49,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:36:49,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:36:49,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 355 transitions, 5177 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-21 19:36:49,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:49,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:36:49,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:51,021 INFO L124 PetriNetUnfolderBase]: 2571/4263 cut-off events. [2024-06-21 19:36:51,021 INFO L125 PetriNetUnfolderBase]: For 133250/133250 co-relation queries the response was YES. [2024-06-21 19:36:51,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28061 conditions, 4263 events. 2571/4263 cut-off events. For 133250/133250 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 26166 event pairs, 598 based on Foata normal form. 8/4244 useless extension candidates. Maximal degree in co-relation 27936. Up to 3622 conditions per place. [2024-06-21 19:36:51,071 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 277 selfloop transitions, 60 changer transitions 0/388 dead transitions. [2024-06-21 19:36:51,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 388 transitions, 6020 flow [2024-06-21 19:36:51,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:36:51,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:36:51,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-21 19:36:51,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-21 19:36:51,073 INFO L175 Difference]: Start difference. First operand has 288 places, 355 transitions, 5177 flow. Second operand 11 states and 180 transitions. [2024-06-21 19:36:51,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 388 transitions, 6020 flow [2024-06-21 19:36:51,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 388 transitions, 5919 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 19:36:51,407 INFO L231 Difference]: Finished difference. Result has 294 places, 358 transitions, 5268 flow [2024-06-21 19:36:51,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5076, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5268, PETRI_PLACES=294, PETRI_TRANSITIONS=358} [2024-06-21 19:36:51,408 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-21 19:36:51,408 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 358 transitions, 5268 flow [2024-06-21 19:36:51,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-21 19:36:51,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:51,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:51,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 19:36:51,408 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)] === [2024-06-21 19:36:51,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:51,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1425928405, now seen corresponding path program 1 times [2024-06-21 19:36:51,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:51,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384649872] [2024-06-21 19:36:51,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:51,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:36:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:36:55,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:36:55,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384649872] [2024-06-21 19:36:55,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384649872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:36:55,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:36:55,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:36:55,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99521174] [2024-06-21 19:36:55,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:36:55,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:36:55,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:36:55,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:36:55,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:36:55,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:36:55,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 358 transitions, 5268 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:55,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:36:55,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:36:55,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:36:57,268 INFO L124 PetriNetUnfolderBase]: 2676/4415 cut-off events. [2024-06-21 19:36:57,268 INFO L125 PetriNetUnfolderBase]: For 136213/136223 co-relation queries the response was YES. [2024-06-21 19:36:57,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29081 conditions, 4415 events. 2676/4415 cut-off events. For 136213/136223 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 27095 event pairs, 780 based on Foata normal form. 12/4424 useless extension candidates. Maximal degree in co-relation 28954. Up to 3885 conditions per place. [2024-06-21 19:36:57,334 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 322 selfloop transitions, 67 changer transitions 0/394 dead transitions. [2024-06-21 19:36:57,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 394 transitions, 6341 flow [2024-06-21 19:36:57,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:36:57,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:36:57,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 19:36:57,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 19:36:57,336 INFO L175 Difference]: Start difference. First operand has 294 places, 358 transitions, 5268 flow. Second operand 9 states and 151 transitions. [2024-06-21 19:36:57,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 394 transitions, 6341 flow [2024-06-21 19:36:57,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 394 transitions, 6244 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 19:36:57,712 INFO L231 Difference]: Finished difference. Result has 296 places, 362 transitions, 5380 flow [2024-06-21 19:36:57,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5171, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5380, PETRI_PLACES=296, PETRI_TRANSITIONS=362} [2024-06-21 19:36:57,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-21 19:36:57,713 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 362 transitions, 5380 flow [2024-06-21 19:36:57,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:36:57,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:36:57,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:36:57,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 19:36:57,714 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:36:57,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:36:57,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1428785365, now seen corresponding path program 2 times [2024-06-21 19:36:57,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:36:57,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429139874] [2024-06-21 19:36:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:36:57,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:36:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:01,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:01,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429139874] [2024-06-21 19:37:01,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429139874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:01,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:01,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:37:01,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513625526] [2024-06-21 19:37:01,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:01,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:37:01,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:01,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:37:01,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:37:01,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:01,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 362 transitions, 5380 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:01,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:01,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:01,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:03,342 INFO L124 PetriNetUnfolderBase]: 2692/4440 cut-off events. [2024-06-21 19:37:03,342 INFO L125 PetriNetUnfolderBase]: For 141543/141553 co-relation queries the response was YES. [2024-06-21 19:37:03,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29413 conditions, 4440 events. 2692/4440 cut-off events. For 141543/141553 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 27351 event pairs, 844 based on Foata normal form. 12/4449 useless extension candidates. Maximal degree in co-relation 29285. Up to 4047 conditions per place. [2024-06-21 19:37:03,383 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 322 selfloop transitions, 62 changer transitions 0/389 dead transitions. [2024-06-21 19:37:03,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 389 transitions, 6291 flow [2024-06-21 19:37:03,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:37:03,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:37:03,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 19:37:03,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 19:37:03,385 INFO L175 Difference]: Start difference. First operand has 296 places, 362 transitions, 5380 flow. Second operand 9 states and 145 transitions. [2024-06-21 19:37:03,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 389 transitions, 6291 flow [2024-06-21 19:37:03,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 389 transitions, 6193 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 19:37:03,692 INFO L231 Difference]: Finished difference. Result has 301 places, 364 transitions, 5452 flow [2024-06-21 19:37:03,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5292, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5452, PETRI_PLACES=301, PETRI_TRANSITIONS=364} [2024-06-21 19:37:03,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-21 19:37:03,692 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 364 transitions, 5452 flow [2024-06-21 19:37:03,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:03,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:03,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:03,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 19:37:03,693 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:03,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:03,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1428790325, now seen corresponding path program 1 times [2024-06-21 19:37:03,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:03,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045689655] [2024-06-21 19:37:03,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:03,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:08,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:08,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045689655] [2024-06-21 19:37:08,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045689655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:08,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:08,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:37:08,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769275934] [2024-06-21 19:37:08,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:08,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:37:08,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:08,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:37:08,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:37:08,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:08,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 364 transitions, 5452 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:08,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:08,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:08,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:10,175 INFO L124 PetriNetUnfolderBase]: 2689/4422 cut-off events. [2024-06-21 19:37:10,175 INFO L125 PetriNetUnfolderBase]: For 140257/140257 co-relation queries the response was YES. [2024-06-21 19:37:10,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29469 conditions, 4422 events. 2689/4422 cut-off events. For 140257/140257 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27042 event pairs, 836 based on Foata normal form. 1/4421 useless extension candidates. Maximal degree in co-relation 29339. Up to 4104 conditions per place. [2024-06-21 19:37:10,227 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 318 selfloop transitions, 63 changer transitions 0/386 dead transitions. [2024-06-21 19:37:10,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 386 transitions, 6373 flow [2024-06-21 19:37:10,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:37:10,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:37:10,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 19:37:10,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 19:37:10,229 INFO L175 Difference]: Start difference. First operand has 301 places, 364 transitions, 5452 flow. Second operand 8 states and 139 transitions. [2024-06-21 19:37:10,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 386 transitions, 6373 flow [2024-06-21 19:37:10,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 386 transitions, 6183 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 19:37:10,595 INFO L231 Difference]: Finished difference. Result has 301 places, 365 transitions, 5409 flow [2024-06-21 19:37:10,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5268, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5409, PETRI_PLACES=301, PETRI_TRANSITIONS=365} [2024-06-21 19:37:10,599 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-21 19:37:10,599 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 365 transitions, 5409 flow [2024-06-21 19:37:10,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:10,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:10,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:10,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 19:37:10,600 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:10,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:10,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1544076535, now seen corresponding path program 3 times [2024-06-21 19:37:10,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:10,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639135462] [2024-06-21 19:37:10,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:10,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:14,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:14,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639135462] [2024-06-21 19:37:14,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639135462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:14,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:14,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:37:14,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970859316] [2024-06-21 19:37:14,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:14,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:37:14,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:14,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:37:14,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:37:14,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:14,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 365 transitions, 5409 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:14,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:14,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:14,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:16,032 INFO L124 PetriNetUnfolderBase]: 2705/4460 cut-off events. [2024-06-21 19:37:16,032 INFO L125 PetriNetUnfolderBase]: For 149275/149285 co-relation queries the response was YES. [2024-06-21 19:37:16,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29623 conditions, 4460 events. 2705/4460 cut-off events. For 149275/149285 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 27499 event pairs, 843 based on Foata normal form. 12/4469 useless extension candidates. Maximal degree in co-relation 29492. Up to 4126 conditions per place. [2024-06-21 19:37:16,081 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 334 selfloop transitions, 47 changer transitions 0/386 dead transitions. [2024-06-21 19:37:16,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 386 transitions, 6274 flow [2024-06-21 19:37:16,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:37:16,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:37:16,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 19:37:16,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-21 19:37:16,083 INFO L175 Difference]: Start difference. First operand has 301 places, 365 transitions, 5409 flow. Second operand 9 states and 140 transitions. [2024-06-21 19:37:16,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 386 transitions, 6274 flow [2024-06-21 19:37:16,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 386 transitions, 6156 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 19:37:16,441 INFO L231 Difference]: Finished difference. Result has 305 places, 367 transitions, 5427 flow [2024-06-21 19:37:16,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5293, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5427, PETRI_PLACES=305, PETRI_TRANSITIONS=367} [2024-06-21 19:37:16,441 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-21 19:37:16,442 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 367 transitions, 5427 flow [2024-06-21 19:37:16,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:16,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:16,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:16,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 19:37:16,442 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:16,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:16,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1049434315, now seen corresponding path program 2 times [2024-06-21 19:37:16,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:16,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623468557] [2024-06-21 19:37:16,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:16,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:20,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:20,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623468557] [2024-06-21 19:37:20,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623468557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:20,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:20,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:37:20,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491740676] [2024-06-21 19:37:20,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:20,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:37:20,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:20,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:37:20,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:37:21,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:21,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 367 transitions, 5427 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:21,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:21,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:21,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:22,924 INFO L124 PetriNetUnfolderBase]: 2710/4453 cut-off events. [2024-06-21 19:37:22,925 INFO L125 PetriNetUnfolderBase]: For 148997/148997 co-relation queries the response was YES. [2024-06-21 19:37:22,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29756 conditions, 4453 events. 2710/4453 cut-off events. For 148997/148997 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 27221 event pairs, 836 based on Foata normal form. 1/4452 useless extension candidates. Maximal degree in co-relation 29623. Up to 4178 conditions per place. [2024-06-21 19:37:22,971 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 335 selfloop transitions, 47 changer transitions 0/387 dead transitions. [2024-06-21 19:37:22,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 387 transitions, 6372 flow [2024-06-21 19:37:22,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:37:22,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:37:22,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 19:37:22,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 19:37:22,973 INFO L175 Difference]: Start difference. First operand has 305 places, 367 transitions, 5427 flow. Second operand 9 states and 144 transitions. [2024-06-21 19:37:22,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 387 transitions, 6372 flow [2024-06-21 19:37:23,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 387 transitions, 6266 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 19:37:23,410 INFO L231 Difference]: Finished difference. Result has 307 places, 370 transitions, 5462 flow [2024-06-21 19:37:23,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5321, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5462, PETRI_PLACES=307, PETRI_TRANSITIONS=370} [2024-06-21 19:37:23,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-21 19:37:23,411 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 370 transitions, 5462 flow [2024-06-21 19:37:23,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:23,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:23,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:23,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 19:37:23,412 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:23,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:23,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1049254825, now seen corresponding path program 3 times [2024-06-21 19:37:23,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:23,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107235923] [2024-06-21 19:37:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:23,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:28,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:28,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107235923] [2024-06-21 19:37:28,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107235923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:28,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:28,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:37:28,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507584411] [2024-06-21 19:37:28,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:28,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:37:28,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:28,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:37:28,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:37:28,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:28,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 370 transitions, 5462 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:28,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:28,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:28,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:30,319 INFO L124 PetriNetUnfolderBase]: 2707/4457 cut-off events. [2024-06-21 19:37:30,319 INFO L125 PetriNetUnfolderBase]: For 151992/151992 co-relation queries the response was YES. [2024-06-21 19:37:30,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29722 conditions, 4457 events. 2707/4457 cut-off events. For 151992/151992 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 27351 event pairs, 836 based on Foata normal form. 1/4456 useless extension candidates. Maximal degree in co-relation 29588. Up to 4175 conditions per place. [2024-06-21 19:37:30,368 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 335 selfloop transitions, 49 changer transitions 0/389 dead transitions. [2024-06-21 19:37:30,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 389 transitions, 6289 flow [2024-06-21 19:37:30,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:37:30,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:37:30,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 165 transitions. [2024-06-21 19:37:30,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-21 19:37:30,370 INFO L175 Difference]: Start difference. First operand has 307 places, 370 transitions, 5462 flow. Second operand 11 states and 165 transitions. [2024-06-21 19:37:30,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 389 transitions, 6289 flow [2024-06-21 19:37:30,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 389 transitions, 6174 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 19:37:30,767 INFO L231 Difference]: Finished difference. Result has 311 places, 371 transitions, 5471 flow [2024-06-21 19:37:30,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5354, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5471, PETRI_PLACES=311, PETRI_TRANSITIONS=371} [2024-06-21 19:37:30,768 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-21 19:37:30,768 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 371 transitions, 5471 flow [2024-06-21 19:37:30,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:30,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:30,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:30,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 19:37:30,769 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:30,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:30,769 INFO L85 PathProgramCache]: Analyzing trace with hash 765564629, now seen corresponding path program 4 times [2024-06-21 19:37:30,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:30,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987040242] [2024-06-21 19:37:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:30,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:34,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:34,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987040242] [2024-06-21 19:37:34,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987040242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:34,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:34,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:37:34,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15516986] [2024-06-21 19:37:34,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:34,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:37:34,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:34,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:37:34,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:37:34,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:34,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 371 transitions, 5471 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:34,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:34,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:34,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:36,093 INFO L124 PetriNetUnfolderBase]: 2697/4456 cut-off events. [2024-06-21 19:37:36,094 INFO L125 PetriNetUnfolderBase]: For 153494/153536 co-relation queries the response was YES. [2024-06-21 19:37:36,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29425 conditions, 4456 events. 2697/4456 cut-off events. For 153494/153536 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27562 event pairs, 854 based on Foata normal form. 29/4479 useless extension candidates. Maximal degree in co-relation 29291. Up to 4105 conditions per place. [2024-06-21 19:37:36,147 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 330 selfloop transitions, 52 changer transitions 0/387 dead transitions. [2024-06-21 19:37:36,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 387 transitions, 6298 flow [2024-06-21 19:37:36,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:37:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:37:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2024-06-21 19:37:36,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3547619047619048 [2024-06-21 19:37:36,149 INFO L175 Difference]: Start difference. First operand has 311 places, 371 transitions, 5471 flow. Second operand 10 states and 149 transitions. [2024-06-21 19:37:36,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 387 transitions, 6298 flow [2024-06-21 19:37:36,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 387 transitions, 6184 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 19:37:36,578 INFO L231 Difference]: Finished difference. Result has 312 places, 371 transitions, 5467 flow [2024-06-21 19:37:36,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5357, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5467, PETRI_PLACES=312, PETRI_TRANSITIONS=371} [2024-06-21 19:37:36,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-21 19:37:36,579 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 371 transitions, 5467 flow [2024-06-21 19:37:36,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:36,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:36,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:36,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 19:37:36,580 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:36,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:36,580 INFO L85 PathProgramCache]: Analyzing trace with hash 196861015, now seen corresponding path program 4 times [2024-06-21 19:37:36,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:36,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589173888] [2024-06-21 19:37:36,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:36,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:41,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:41,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589173888] [2024-06-21 19:37:41,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589173888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:41,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:41,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:37:41,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810602512] [2024-06-21 19:37:41,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:41,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:37:41,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:41,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:37:41,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:37:41,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:41,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 371 transitions, 5467 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:41,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:41,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:41,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:43,086 INFO L124 PetriNetUnfolderBase]: 2702/4453 cut-off events. [2024-06-21 19:37:43,087 INFO L125 PetriNetUnfolderBase]: For 151163/151172 co-relation queries the response was YES. [2024-06-21 19:37:43,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29547 conditions, 4453 events. 2702/4453 cut-off events. For 151163/151172 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27351 event pairs, 836 based on Foata normal form. 7/4457 useless extension candidates. Maximal degree in co-relation 29413. Up to 4143 conditions per place. [2024-06-21 19:37:43,137 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 320 selfloop transitions, 65 changer transitions 0/390 dead transitions. [2024-06-21 19:37:43,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 390 transitions, 6431 flow [2024-06-21 19:37:43,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:37:43,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:37:43,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 160 transitions. [2024-06-21 19:37:43,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3463203463203463 [2024-06-21 19:37:43,138 INFO L175 Difference]: Start difference. First operand has 312 places, 371 transitions, 5467 flow. Second operand 11 states and 160 transitions. [2024-06-21 19:37:43,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 390 transitions, 6431 flow [2024-06-21 19:37:43,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 390 transitions, 6310 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 19:37:43,608 INFO L231 Difference]: Finished difference. Result has 315 places, 375 transitions, 5539 flow [2024-06-21 19:37:43,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5346, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5539, PETRI_PLACES=315, PETRI_TRANSITIONS=375} [2024-06-21 19:37:43,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-21 19:37:43,609 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 375 transitions, 5539 flow [2024-06-21 19:37:43,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:43,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:43,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:43,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 19:37:43,609 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)] === [2024-06-21 19:37:43,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:43,610 INFO L85 PathProgramCache]: Analyzing trace with hash -31040135, now seen corresponding path program 5 times [2024-06-21 19:37:43,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:43,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903095264] [2024-06-21 19:37:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:43,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:47,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:47,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903095264] [2024-06-21 19:37:47,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903095264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:47,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:47,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:37:47,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634204262] [2024-06-21 19:37:47,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:47,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:37:47,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:47,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:37:47,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:37:47,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:47,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 375 transitions, 5539 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:47,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:47,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:47,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:49,563 INFO L124 PetriNetUnfolderBase]: 2707/4454 cut-off events. [2024-06-21 19:37:49,564 INFO L125 PetriNetUnfolderBase]: For 155268/155277 co-relation queries the response was YES. [2024-06-21 19:37:49,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29653 conditions, 4454 events. 2707/4454 cut-off events. For 155268/155277 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27271 event pairs, 836 based on Foata normal form. 7/4458 useless extension candidates. Maximal degree in co-relation 29518. Up to 4149 conditions per place. [2024-06-21 19:37:49,617 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 323 selfloop transitions, 66 changer transitions 0/394 dead transitions. [2024-06-21 19:37:49,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 394 transitions, 6506 flow [2024-06-21 19:37:49,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:37:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:37:49,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 178 transitions. [2024-06-21 19:37:49,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3531746031746032 [2024-06-21 19:37:49,619 INFO L175 Difference]: Start difference. First operand has 315 places, 375 transitions, 5539 flow. Second operand 12 states and 178 transitions. [2024-06-21 19:37:49,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 394 transitions, 6506 flow [2024-06-21 19:37:50,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 394 transitions, 6377 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 19:37:50,139 INFO L231 Difference]: Finished difference. Result has 319 places, 378 transitions, 5598 flow [2024-06-21 19:37:50,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5417, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5598, PETRI_PLACES=319, PETRI_TRANSITIONS=378} [2024-06-21 19:37:50,140 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-21 19:37:50,140 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 378 transitions, 5598 flow [2024-06-21 19:37:50,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:50,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:50,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:50,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 19:37:50,141 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:50,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:50,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1626822703, now seen corresponding path program 6 times [2024-06-21 19:37:50,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:50,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795004902] [2024-06-21 19:37:50,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:50,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:37:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:37:54,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:37:54,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795004902] [2024-06-21 19:37:54,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795004902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:37:54,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:37:54,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:37:54,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680596207] [2024-06-21 19:37:54,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:37:54,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:37:54,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:37:54,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:37:54,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:37:54,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:37:54,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 378 transitions, 5598 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:54,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:37:54,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:37:54,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:37:56,399 INFO L124 PetriNetUnfolderBase]: 2704/4452 cut-off events. [2024-06-21 19:37:56,400 INFO L125 PetriNetUnfolderBase]: For 154031/154040 co-relation queries the response was YES. [2024-06-21 19:37:56,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29567 conditions, 4452 events. 2704/4452 cut-off events. For 154031/154040 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 27284 event pairs, 836 based on Foata normal form. 7/4456 useless extension candidates. Maximal degree in co-relation 29433. Up to 4146 conditions per place. [2024-06-21 19:37:56,445 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 321 selfloop transitions, 65 changer transitions 0/391 dead transitions. [2024-06-21 19:37:56,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 391 transitions, 6400 flow [2024-06-21 19:37:56,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:37:56,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:37:56,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-21 19:37:56,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3595238095238095 [2024-06-21 19:37:56,447 INFO L175 Difference]: Start difference. First operand has 319 places, 378 transitions, 5598 flow. Second operand 10 states and 151 transitions. [2024-06-21 19:37:56,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 391 transitions, 6400 flow [2024-06-21 19:37:56,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 391 transitions, 6244 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 19:37:56,922 INFO L231 Difference]: Finished difference. Result has 320 places, 378 transitions, 5580 flow [2024-06-21 19:37:56,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5442, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5580, PETRI_PLACES=320, PETRI_TRANSITIONS=378} [2024-06-21 19:37:56,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-21 19:37:56,923 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 378 transitions, 5580 flow [2024-06-21 19:37:56,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:37:56,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:37:56,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:37:56,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 19:37:56,924 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:37:56,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:37:56,924 INFO L85 PathProgramCache]: Analyzing trace with hash 523141464, now seen corresponding path program 1 times [2024-06-21 19:37:56,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:37:56,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338045937] [2024-06-21 19:37:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:37:56,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:37:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:03,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:03,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338045937] [2024-06-21 19:38:03,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338045937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:03,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:03,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:38:03,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367738208] [2024-06-21 19:38:03,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:03,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:38:03,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:03,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:38:03,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:38:03,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:38:03,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 378 transitions, 5580 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:03,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:03,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:38:03,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:05,732 INFO L124 PetriNetUnfolderBase]: 2788/4580 cut-off events. [2024-06-21 19:38:05,732 INFO L125 PetriNetUnfolderBase]: For 160523/160527 co-relation queries the response was YES. [2024-06-21 19:38:05,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30982 conditions, 4580 events. 2788/4580 cut-off events. For 160523/160527 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 27971 event pairs, 656 based on Foata normal form. 2/4577 useless extension candidates. Maximal degree in co-relation 30847. Up to 4232 conditions per place. [2024-06-21 19:38:05,784 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 386 selfloop transitions, 48 changer transitions 0/439 dead transitions. [2024-06-21 19:38:05,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 439 transitions, 7177 flow [2024-06-21 19:38:05,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:38:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:38:05,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 19:38:05,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:38:05,791 INFO L175 Difference]: Start difference. First operand has 320 places, 378 transitions, 5580 flow. Second operand 10 states and 170 transitions. [2024-06-21 19:38:05,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 439 transitions, 7177 flow [2024-06-21 19:38:06,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 439 transitions, 7039 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:38:06,368 INFO L231 Difference]: Finished difference. Result has 323 places, 402 transitions, 6069 flow [2024-06-21 19:38:06,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5444, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6069, PETRI_PLACES=323, PETRI_TRANSITIONS=402} [2024-06-21 19:38:06,377 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-21 19:38:06,377 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 402 transitions, 6069 flow [2024-06-21 19:38:06,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:06,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:06,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:06,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 19:38:06,377 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:06,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:06,378 INFO L85 PathProgramCache]: Analyzing trace with hash 523261434, now seen corresponding path program 2 times [2024-06-21 19:38:06,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:06,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854269214] [2024-06-21 19:38:06,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:06,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:12,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:12,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854269214] [2024-06-21 19:38:12,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854269214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:12,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:12,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:38:12,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543130352] [2024-06-21 19:38:12,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:12,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:38:12,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:12,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:38:12,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:38:12,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:38:12,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 402 transitions, 6069 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:12,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:12,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:38:12,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:14,173 INFO L124 PetriNetUnfolderBase]: 2798/4606 cut-off events. [2024-06-21 19:38:14,173 INFO L125 PetriNetUnfolderBase]: For 165212/165216 co-relation queries the response was YES. [2024-06-21 19:38:14,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31662 conditions, 4606 events. 2798/4606 cut-off events. For 165212/165216 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 28219 event pairs, 649 based on Foata normal form. 2/4603 useless extension candidates. Maximal degree in co-relation 31524. Up to 4260 conditions per place. [2024-06-21 19:38:14,224 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 389 selfloop transitions, 46 changer transitions 0/440 dead transitions. [2024-06-21 19:38:14,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 440 transitions, 7174 flow [2024-06-21 19:38:14,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:38:14,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:38:14,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 19:38:14,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 19:38:14,225 INFO L175 Difference]: Start difference. First operand has 323 places, 402 transitions, 6069 flow. Second operand 9 states and 156 transitions. [2024-06-21 19:38:14,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 440 transitions, 7174 flow [2024-06-21 19:38:14,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 440 transitions, 7091 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-21 19:38:14,750 INFO L231 Difference]: Finished difference. Result has 331 places, 409 transitions, 6220 flow [2024-06-21 19:38:14,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6006, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6220, PETRI_PLACES=331, PETRI_TRANSITIONS=409} [2024-06-21 19:38:14,751 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-21 19:38:14,751 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 409 transitions, 6220 flow [2024-06-21 19:38:14,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:14,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:14,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:14,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 19:38:14,752 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:14,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:14,752 INFO L85 PathProgramCache]: Analyzing trace with hash 367655306, now seen corresponding path program 3 times [2024-06-21 19:38:14,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:14,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503199174] [2024-06-21 19:38:14,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:14,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:21,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:21,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:21,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503199174] [2024-06-21 19:38:21,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503199174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:21,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:21,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:38:21,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482976448] [2024-06-21 19:38:21,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:21,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:38:21,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:21,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:38:21,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:38:21,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:38:21,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 409 transitions, 6220 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:21,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:21,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:38:21,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:24,171 INFO L124 PetriNetUnfolderBase]: 2813/4631 cut-off events. [2024-06-21 19:38:24,171 INFO L125 PetriNetUnfolderBase]: For 171513/171517 co-relation queries the response was YES. [2024-06-21 19:38:24,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32042 conditions, 4631 events. 2813/4631 cut-off events. For 171513/171517 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 28381 event pairs, 649 based on Foata normal form. 2/4628 useless extension candidates. Maximal degree in co-relation 31901. Up to 4274 conditions per place. [2024-06-21 19:38:24,224 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 391 selfloop transitions, 56 changer transitions 0/452 dead transitions. [2024-06-21 19:38:24,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 452 transitions, 7396 flow [2024-06-21 19:38:24,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:38:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:38:24,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 200 transitions. [2024-06-21 19:38:24,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3663003663003663 [2024-06-21 19:38:24,226 INFO L175 Difference]: Start difference. First operand has 331 places, 409 transitions, 6220 flow. Second operand 13 states and 200 transitions. [2024-06-21 19:38:24,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 452 transitions, 7396 flow [2024-06-21 19:38:24,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 452 transitions, 7274 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 19:38:24,729 INFO L231 Difference]: Finished difference. Result has 339 places, 419 transitions, 6411 flow [2024-06-21 19:38:24,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6110, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6411, PETRI_PLACES=339, PETRI_TRANSITIONS=419} [2024-06-21 19:38:24,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-21 19:38:24,730 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 419 transitions, 6411 flow [2024-06-21 19:38:24,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:24,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:24,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:24,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 19:38:24,731 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:24,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:24,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1167764998, now seen corresponding path program 4 times [2024-06-21 19:38:24,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:24,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16799166] [2024-06-21 19:38:24,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:24,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:30,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:30,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16799166] [2024-06-21 19:38:30,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16799166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:30,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:30,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:38:30,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184453267] [2024-06-21 19:38:30,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:30,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:38:30,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:30,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:38:30,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:38:30,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:38:30,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 419 transitions, 6411 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:30,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:30,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:38:30,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:32,954 INFO L124 PetriNetUnfolderBase]: 2996/4947 cut-off events. [2024-06-21 19:38:32,954 INFO L125 PetriNetUnfolderBase]: For 185553/185577 co-relation queries the response was YES. [2024-06-21 19:38:32,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34174 conditions, 4947 events. 2996/4947 cut-off events. For 185553/185577 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 30828 event pairs, 718 based on Foata normal form. 5/4941 useless extension candidates. Maximal degree in co-relation 34031. Up to 4124 conditions per place. [2024-06-21 19:38:33,007 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 368 selfloop transitions, 151 changer transitions 0/524 dead transitions. [2024-06-21 19:38:33,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 524 transitions, 8876 flow [2024-06-21 19:38:33,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:38:33,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:38:33,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 19:38:33,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 19:38:33,009 INFO L175 Difference]: Start difference. First operand has 339 places, 419 transitions, 6411 flow. Second operand 9 states and 170 transitions. [2024-06-21 19:38:33,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 524 transitions, 8876 flow [2024-06-21 19:38:33,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 524 transitions, 8740 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 19:38:33,607 INFO L231 Difference]: Finished difference. Result has 342 places, 473 transitions, 7362 flow [2024-06-21 19:38:33,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6275, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7362, PETRI_PLACES=342, PETRI_TRANSITIONS=473} [2024-06-21 19:38:33,608 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-21 19:38:33,608 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 473 transitions, 7362 flow [2024-06-21 19:38:33,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:33,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:33,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:33,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 19:38:33,609 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:33,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:33,609 INFO L85 PathProgramCache]: Analyzing trace with hash -524876300, now seen corresponding path program 5 times [2024-06-21 19:38:33,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:33,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637865448] [2024-06-21 19:38:33,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:33,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:39,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:39,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637865448] [2024-06-21 19:38:39,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637865448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:39,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:39,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:38:39,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128009530] [2024-06-21 19:38:39,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:39,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:38:39,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:39,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:38:39,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:38:40,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:38:40,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 473 transitions, 7362 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:40,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:40,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:38:40,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:42,330 INFO L124 PetriNetUnfolderBase]: 3009/4969 cut-off events. [2024-06-21 19:38:42,331 INFO L125 PetriNetUnfolderBase]: For 196556/196580 co-relation queries the response was YES. [2024-06-21 19:38:42,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35415 conditions, 4969 events. 3009/4969 cut-off events. For 196556/196580 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 31037 event pairs, 718 based on Foata normal form. 5/4963 useless extension candidates. Maximal degree in co-relation 35268. Up to 4139 conditions per place. [2024-06-21 19:38:42,396 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 364 selfloop transitions, 157 changer transitions 0/526 dead transitions. [2024-06-21 19:38:42,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 526 transitions, 9277 flow [2024-06-21 19:38:42,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:38:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:38:42,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 19:38:42,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 19:38:42,398 INFO L175 Difference]: Start difference. First operand has 342 places, 473 transitions, 7362 flow. Second operand 9 states and 166 transitions. [2024-06-21 19:38:42,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 526 transitions, 9277 flow [2024-06-21 19:38:43,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 526 transitions, 9138 flow, removed 67 selfloop flow, removed 1 redundant places. [2024-06-21 19:38:43,222 INFO L231 Difference]: Finished difference. Result has 351 places, 481 transitions, 7725 flow [2024-06-21 19:38:43,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7255, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7725, PETRI_PLACES=351, PETRI_TRANSITIONS=481} [2024-06-21 19:38:43,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-21 19:38:43,223 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 481 transitions, 7725 flow [2024-06-21 19:38:43,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:43,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:43,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:43,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 19:38:43,223 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:38:43,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:43,225 INFO L85 PathProgramCache]: Analyzing trace with hash -192138280, now seen corresponding path program 1 times [2024-06-21 19:38:43,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:43,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820624026] [2024-06-21 19:38:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:43,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:38:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:38:49,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:38:49,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820624026] [2024-06-21 19:38:49,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820624026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:38:49,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:38:49,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:38:49,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771565980] [2024-06-21 19:38:49,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:38:49,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:38:49,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:38:49,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:38:49,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:38:49,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:38:49,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 481 transitions, 7725 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:49,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:38:49,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:38:49,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:38:51,786 INFO L124 PetriNetUnfolderBase]: 3094/5100 cut-off events. [2024-06-21 19:38:51,786 INFO L125 PetriNetUnfolderBase]: For 210766/210796 co-relation queries the response was YES. [2024-06-21 19:38:51,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36853 conditions, 5100 events. 3094/5100 cut-off events. For 210766/210796 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 31945 event pairs, 862 based on Foata normal form. 18/5111 useless extension candidates. Maximal degree in co-relation 36702. Up to 4483 conditions per place. [2024-06-21 19:38:51,852 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 429 selfloop transitions, 127 changer transitions 0/561 dead transitions. [2024-06-21 19:38:51,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 561 transitions, 10066 flow [2024-06-21 19:38:51,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:38:51,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:38:51,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 212 transitions. [2024-06-21 19:38:51,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3882783882783883 [2024-06-21 19:38:51,854 INFO L175 Difference]: Start difference. First operand has 351 places, 481 transitions, 7725 flow. Second operand 13 states and 212 transitions. [2024-06-21 19:38:51,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 561 transitions, 10066 flow [2024-06-21 19:38:52,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 561 transitions, 9779 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 19:38:52,731 INFO L231 Difference]: Finished difference. Result has 361 places, 519 transitions, 8442 flow [2024-06-21 19:38:52,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7438, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8442, PETRI_PLACES=361, PETRI_TRANSITIONS=519} [2024-06-21 19:38:52,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-21 19:38:52,732 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 519 transitions, 8442 flow [2024-06-21 19:38:52,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:38:52,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:38:52,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:38:52,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 19:38:52,733 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)] === [2024-06-21 19:38:52,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:38:52,733 INFO L85 PathProgramCache]: Analyzing trace with hash -197799562, now seen corresponding path program 6 times [2024-06-21 19:38:52,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:38:52,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938269074] [2024-06-21 19:38:52,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:38:52,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:38:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:01,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:01,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938269074] [2024-06-21 19:39:01,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938269074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:01,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:01,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:39:01,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611953177] [2024-06-21 19:39:01,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:01,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:39:01,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:01,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:39:01,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:39:01,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:39:01,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 519 transitions, 8442 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:01,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:01,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:39:01,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:03,940 INFO L124 PetriNetUnfolderBase]: 3091/5075 cut-off events. [2024-06-21 19:39:03,941 INFO L125 PetriNetUnfolderBase]: For 215917/215941 co-relation queries the response was YES. [2024-06-21 19:39:03,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37268 conditions, 5075 events. 3091/5075 cut-off events. For 215917/215941 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 31518 event pairs, 719 based on Foata normal form. 5/5069 useless extension candidates. Maximal degree in co-relation 37114. Up to 4254 conditions per place. [2024-06-21 19:39:04,007 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 405 selfloop transitions, 153 changer transitions 0/563 dead transitions. [2024-06-21 19:39:04,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 563 transitions, 10347 flow [2024-06-21 19:39:04,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:39:04,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:39:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 19:39:04,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 19:39:04,009 INFO L175 Difference]: Start difference. First operand has 361 places, 519 transitions, 8442 flow. Second operand 9 states and 172 transitions. [2024-06-21 19:39:04,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 563 transitions, 10347 flow [2024-06-21 19:39:04,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 563 transitions, 10114 flow, removed 90 selfloop flow, removed 3 redundant places. [2024-06-21 19:39:04,761 INFO L231 Difference]: Finished difference. Result has 367 places, 519 transitions, 8523 flow [2024-06-21 19:39:04,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8209, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8523, PETRI_PLACES=367, PETRI_TRANSITIONS=519} [2024-06-21 19:39:04,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-21 19:39:04,762 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 519 transitions, 8523 flow [2024-06-21 19:39:04,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:04,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:04,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:04,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 19:39:04,763 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)] === [2024-06-21 19:39:04,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:04,763 INFO L85 PathProgramCache]: Analyzing trace with hash -197679592, now seen corresponding path program 7 times [2024-06-21 19:39:04,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:04,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676431454] [2024-06-21 19:39:04,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:04,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:11,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:11,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676431454] [2024-06-21 19:39:11,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676431454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:11,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:11,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:39:11,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243441352] [2024-06-21 19:39:11,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:11,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:39:11,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:11,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:39:11,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:39:11,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:39:11,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 519 transitions, 8523 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:11,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:11,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:39:11,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:13,637 INFO L124 PetriNetUnfolderBase]: 3101/5098 cut-off events. [2024-06-21 19:39:13,638 INFO L125 PetriNetUnfolderBase]: For 223407/223440 co-relation queries the response was YES. [2024-06-21 19:39:13,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37581 conditions, 5098 events. 3101/5098 cut-off events. For 223407/223440 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31770 event pairs, 682 based on Foata normal form. 17/5106 useless extension candidates. Maximal degree in co-relation 37425. Up to 4525 conditions per place. [2024-06-21 19:39:13,696 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 456 selfloop transitions, 97 changer transitions 0/558 dead transitions. [2024-06-21 19:39:13,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 558 transitions, 9874 flow [2024-06-21 19:39:13,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:39:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:39:13,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 19:39:13,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-21 19:39:13,698 INFO L175 Difference]: Start difference. First operand has 367 places, 519 transitions, 8523 flow. Second operand 9 states and 158 transitions. [2024-06-21 19:39:13,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 558 transitions, 9874 flow [2024-06-21 19:39:14,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 558 transitions, 9560 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 19:39:14,492 INFO L231 Difference]: Finished difference. Result has 371 places, 528 transitions, 8550 flow [2024-06-21 19:39:14,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8226, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8550, PETRI_PLACES=371, PETRI_TRANSITIONS=528} [2024-06-21 19:39:14,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-21 19:39:14,493 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 528 transitions, 8550 flow [2024-06-21 19:39:14,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:14,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:14,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:14,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 19:39:14,494 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:14,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:14,494 INFO L85 PathProgramCache]: Analyzing trace with hash -188425162, now seen corresponding path program 8 times [2024-06-21 19:39:14,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:14,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886799667] [2024-06-21 19:39:14,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:14,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:20,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:20,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886799667] [2024-06-21 19:39:20,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886799667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:20,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:20,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:39:20,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552016450] [2024-06-21 19:39:20,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:20,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:39:20,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:20,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:39:20,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:39:20,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:39:20,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 528 transitions, 8550 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:20,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:20,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:39:20,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:23,589 INFO L124 PetriNetUnfolderBase]: 3119/5129 cut-off events. [2024-06-21 19:39:23,589 INFO L125 PetriNetUnfolderBase]: For 230327/230360 co-relation queries the response was YES. [2024-06-21 19:39:23,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37773 conditions, 5129 events. 3119/5129 cut-off events. For 230327/230360 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 32045 event pairs, 682 based on Foata normal form. 17/5137 useless extension candidates. Maximal degree in co-relation 37615. Up to 4536 conditions per place. [2024-06-21 19:39:23,657 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 449 selfloop transitions, 112 changer transitions 0/566 dead transitions. [2024-06-21 19:39:23,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 566 transitions, 10052 flow [2024-06-21 19:39:23,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:39:23,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:39:23,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-21 19:39:23,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 19:39:23,659 INFO L175 Difference]: Start difference. First operand has 371 places, 528 transitions, 8550 flow. Second operand 12 states and 188 transitions. [2024-06-21 19:39:23,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 566 transitions, 10052 flow [2024-06-21 19:39:24,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 566 transitions, 9784 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 19:39:24,420 INFO L231 Difference]: Finished difference. Result has 378 places, 538 transitions, 8713 flow [2024-06-21 19:39:24,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8297, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8713, PETRI_PLACES=378, PETRI_TRANSITIONS=538} [2024-06-21 19:39:24,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-21 19:39:24,421 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 538 transitions, 8713 flow [2024-06-21 19:39:24,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:24,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:24,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:24,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 19:39:24,422 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:24,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:24,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2089355048, now seen corresponding path program 9 times [2024-06-21 19:39:24,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:24,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453991041] [2024-06-21 19:39:24,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:24,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:33,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:33,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453991041] [2024-06-21 19:39:33,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453991041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:33,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:33,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:39:33,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308170807] [2024-06-21 19:39:33,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:33,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:39:33,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:33,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:39:33,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:39:33,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:39:33,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 538 transitions, 8713 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:33,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:33,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:39:33,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:35,610 INFO L124 PetriNetUnfolderBase]: 3116/5127 cut-off events. [2024-06-21 19:39:35,610 INFO L125 PetriNetUnfolderBase]: For 235081/235114 co-relation queries the response was YES. [2024-06-21 19:39:35,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37714 conditions, 5127 events. 3116/5127 cut-off events. For 235081/235114 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 32042 event pairs, 682 based on Foata normal form. 17/5135 useless extension candidates. Maximal degree in co-relation 37554. Up to 4533 conditions per place. [2024-06-21 19:39:35,682 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 447 selfloop transitions, 111 changer transitions 0/563 dead transitions. [2024-06-21 19:39:35,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 563 transitions, 9920 flow [2024-06-21 19:39:35,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:39:35,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:39:35,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 19:39:35,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 19:39:35,684 INFO L175 Difference]: Start difference. First operand has 378 places, 538 transitions, 8713 flow. Second operand 9 states and 155 transitions. [2024-06-21 19:39:35,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 563 transitions, 9920 flow [2024-06-21 19:39:36,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 563 transitions, 9704 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 19:39:36,671 INFO L231 Difference]: Finished difference. Result has 382 places, 538 transitions, 8725 flow [2024-06-21 19:39:36,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8497, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8725, PETRI_PLACES=382, PETRI_TRANSITIONS=538} [2024-06-21 19:39:36,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-21 19:39:36,674 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 538 transitions, 8725 flow [2024-06-21 19:39:36,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:36,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:36,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:36,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 19:39:36,674 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:36,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:36,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1824507922, now seen corresponding path program 2 times [2024-06-21 19:39:36,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:36,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896709811] [2024-06-21 19:39:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:36,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:43,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:43,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896709811] [2024-06-21 19:39:43,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896709811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:43,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:43,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:39:43,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720684496] [2024-06-21 19:39:43,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:43,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:39:43,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:43,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:39:43,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:39:43,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:39:43,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 538 transitions, 8725 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:43,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:43,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:39:43,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:46,253 INFO L124 PetriNetUnfolderBase]: 3137/5177 cut-off events. [2024-06-21 19:39:46,254 INFO L125 PetriNetUnfolderBase]: For 245192/245231 co-relation queries the response was YES. [2024-06-21 19:39:46,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38123 conditions, 5177 events. 3137/5177 cut-off events. For 245192/245231 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32597 event pairs, 846 based on Foata normal form. 24/5196 useless extension candidates. Maximal degree in co-relation 37963. Up to 4676 conditions per place. [2024-06-21 19:39:46,321 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 478 selfloop transitions, 100 changer transitions 0/583 dead transitions. [2024-06-21 19:39:46,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 583 transitions, 10519 flow [2024-06-21 19:39:46,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 19:39:46,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 19:39:46,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 224 transitions. [2024-06-21 19:39:46,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35555555555555557 [2024-06-21 19:39:46,323 INFO L175 Difference]: Start difference. First operand has 382 places, 538 transitions, 8725 flow. Second operand 15 states and 224 transitions. [2024-06-21 19:39:46,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 583 transitions, 10519 flow [2024-06-21 19:39:47,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 583 transitions, 10297 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 19:39:47,404 INFO L231 Difference]: Finished difference. Result has 391 places, 548 transitions, 8856 flow [2024-06-21 19:39:47,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8503, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8856, PETRI_PLACES=391, PETRI_TRANSITIONS=548} [2024-06-21 19:39:47,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-21 19:39:47,405 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 548 transitions, 8856 flow [2024-06-21 19:39:47,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:47,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:47,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:47,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 19:39:47,406 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:47,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:47,406 INFO L85 PathProgramCache]: Analyzing trace with hash -2089354676, now seen corresponding path program 3 times [2024-06-21 19:39:47,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:47,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751540601] [2024-06-21 19:39:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:47,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:39:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:39:54,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:39:54,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751540601] [2024-06-21 19:39:54,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751540601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:39:54,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:39:54,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:39:54,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289590940] [2024-06-21 19:39:54,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:39:54,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:39:54,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:39:54,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:39:54,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:39:54,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:39:54,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 548 transitions, 8856 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:54,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:39:54,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:39:54,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:39:56,676 INFO L124 PetriNetUnfolderBase]: 3134/5171 cut-off events. [2024-06-21 19:39:56,677 INFO L125 PetriNetUnfolderBase]: For 249547/249586 co-relation queries the response was YES. [2024-06-21 19:39:56,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38225 conditions, 5171 events. 3134/5171 cut-off events. For 249547/249586 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 32550 event pairs, 846 based on Foata normal form. 24/5190 useless extension candidates. Maximal degree in co-relation 38062. Up to 4674 conditions per place. [2024-06-21 19:39:56,739 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 477 selfloop transitions, 98 changer transitions 0/580 dead transitions. [2024-06-21 19:39:56,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 580 transitions, 10391 flow [2024-06-21 19:39:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:39:56,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:39:56,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 201 transitions. [2024-06-21 19:39:56,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36813186813186816 [2024-06-21 19:39:56,741 INFO L175 Difference]: Start difference. First operand has 391 places, 548 transitions, 8856 flow. Second operand 13 states and 201 transitions. [2024-06-21 19:39:56,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 580 transitions, 10391 flow [2024-06-21 19:39:57,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 580 transitions, 10251 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 19:39:57,680 INFO L231 Difference]: Finished difference. Result has 398 places, 548 transitions, 8918 flow [2024-06-21 19:39:57,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8716, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8918, PETRI_PLACES=398, PETRI_TRANSITIONS=548} [2024-06-21 19:39:57,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-21 19:39:57,680 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 548 transitions, 8918 flow [2024-06-21 19:39:57,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:39:57,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:39:57,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:39:57,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 19:39:57,681 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:39:57,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:39:57,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1003965592, now seen corresponding path program 10 times [2024-06-21 19:39:57,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:39:57,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601067095] [2024-06-21 19:39:57,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:39:57,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:39:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:04,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:04,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601067095] [2024-06-21 19:40:04,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601067095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:04,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:04,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:40:04,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653624814] [2024-06-21 19:40:04,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:04,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:40:04,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:04,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:40:04,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:40:04,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:40:04,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 548 transitions, 8918 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:04,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:04,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:40:04,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:06,411 INFO L124 PetriNetUnfolderBase]: 3154/5183 cut-off events. [2024-06-21 19:40:06,412 INFO L125 PetriNetUnfolderBase]: For 253652/253656 co-relation queries the response was YES. [2024-06-21 19:40:06,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38767 conditions, 5183 events. 3154/5183 cut-off events. For 253652/253656 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32339 event pairs, 649 based on Foata normal form. 2/5180 useless extension candidates. Maximal degree in co-relation 38602. Up to 4772 conditions per place. [2024-06-21 19:40:06,484 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 526 selfloop transitions, 49 changer transitions 0/580 dead transitions. [2024-06-21 19:40:06,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 580 transitions, 10429 flow [2024-06-21 19:40:06,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:40:06,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:40:06,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 19:40:06,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-21 19:40:06,513 INFO L175 Difference]: Start difference. First operand has 398 places, 548 transitions, 8918 flow. Second operand 9 states and 146 transitions. [2024-06-21 19:40:06,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 580 transitions, 10429 flow [2024-06-21 19:40:07,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 580 transitions, 10199 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-21 19:40:07,698 INFO L231 Difference]: Finished difference. Result has 396 places, 561 transitions, 9147 flow [2024-06-21 19:40:07,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8697, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9147, PETRI_PLACES=396, PETRI_TRANSITIONS=561} [2024-06-21 19:40:07,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-21 19:40:07,699 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 561 transitions, 9147 flow [2024-06-21 19:40:07,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:07,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:07,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:07,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 19:40:07,700 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:40:07,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:07,700 INFO L85 PathProgramCache]: Analyzing trace with hash -628398098, now seen corresponding path program 4 times [2024-06-21 19:40:07,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:07,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316198449] [2024-06-21 19:40:07,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:07,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:14,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:14,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316198449] [2024-06-21 19:40:14,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316198449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:14,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:14,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:40:14,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141777481] [2024-06-21 19:40:14,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:14,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:40:14,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:14,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:40:14,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:40:14,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:40:14,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 561 transitions, 9147 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:14,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:14,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:40:14,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:17,405 INFO L124 PetriNetUnfolderBase]: 3244/5343 cut-off events. [2024-06-21 19:40:17,406 INFO L125 PetriNetUnfolderBase]: For 274725/274764 co-relation queries the response was YES. [2024-06-21 19:40:17,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40253 conditions, 5343 events. 3244/5343 cut-off events. For 274725/274764 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33770 event pairs, 846 based on Foata normal form. 24/5362 useless extension candidates. Maximal degree in co-relation 40084. Up to 4758 conditions per place. [2024-06-21 19:40:17,479 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 497 selfloop transitions, 133 changer transitions 0/635 dead transitions. [2024-06-21 19:40:17,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 635 transitions, 11905 flow [2024-06-21 19:40:17,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-21 19:40:17,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-21 19:40:17,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 239 transitions. [2024-06-21 19:40:17,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3556547619047619 [2024-06-21 19:40:17,481 INFO L175 Difference]: Start difference. First operand has 396 places, 561 transitions, 9147 flow. Second operand 16 states and 239 transitions. [2024-06-21 19:40:17,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 635 transitions, 11905 flow [2024-06-21 19:40:18,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 635 transitions, 11803 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 19:40:18,685 INFO L231 Difference]: Finished difference. Result has 414 places, 597 transitions, 10048 flow [2024-06-21 19:40:18,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9045, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10048, PETRI_PLACES=414, PETRI_TRANSITIONS=597} [2024-06-21 19:40:18,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-21 19:40:18,685 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 597 transitions, 10048 flow [2024-06-21 19:40:18,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:18,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:18,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:18,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 19:40:18,686 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:40:18,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:18,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1007690614, now seen corresponding path program 5 times [2024-06-21 19:40:18,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:18,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707171894] [2024-06-21 19:40:18,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:18,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:24,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:24,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707171894] [2024-06-21 19:40:24,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707171894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:24,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:24,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:40:24,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333417575] [2024-06-21 19:40:24,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:24,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:40:24,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:24,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:40:24,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:40:24,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:40:24,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 597 transitions, 10048 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:24,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:24,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:40:24,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:27,661 INFO L124 PetriNetUnfolderBase]: 3241/5336 cut-off events. [2024-06-21 19:40:27,662 INFO L125 PetriNetUnfolderBase]: For 281613/281652 co-relation queries the response was YES. [2024-06-21 19:40:27,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40836 conditions, 5336 events. 3241/5336 cut-off events. For 281613/281652 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 33653 event pairs, 847 based on Foata normal form. 24/5355 useless extension candidates. Maximal degree in co-relation 40661. Up to 4756 conditions per place. [2024-06-21 19:40:27,738 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 496 selfloop transitions, 131 changer transitions 0/632 dead transitions. [2024-06-21 19:40:27,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 632 transitions, 12037 flow [2024-06-21 19:40:27,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:40:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:40:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 214 transitions. [2024-06-21 19:40:27,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-21 19:40:27,740 INFO L175 Difference]: Start difference. First operand has 414 places, 597 transitions, 10048 flow. Second operand 14 states and 214 transitions. [2024-06-21 19:40:27,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 632 transitions, 12037 flow [2024-06-21 19:40:29,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 632 transitions, 11887 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-21 19:40:29,023 INFO L231 Difference]: Finished difference. Result has 424 places, 597 transitions, 10166 flow [2024-06-21 19:40:29,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9898, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10166, PETRI_PLACES=424, PETRI_TRANSITIONS=597} [2024-06-21 19:40:29,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-21 19:40:29,024 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 597 transitions, 10166 flow [2024-06-21 19:40:29,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:29,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:29,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:29,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 19:40:29,024 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:40:29,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:29,025 INFO L85 PathProgramCache]: Analyzing trace with hash 674952594, now seen corresponding path program 11 times [2024-06-21 19:40:29,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:29,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324219564] [2024-06-21 19:40:29,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:29,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:37,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:37,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324219564] [2024-06-21 19:40:37,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324219564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:37,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:37,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:40:37,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985066397] [2024-06-21 19:40:37,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:37,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:40:37,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:37,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:40:37,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:40:37,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:40:37,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 597 transitions, 10166 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:37,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:37,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:40:37,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:39,764 INFO L124 PetriNetUnfolderBase]: 3272/5364 cut-off events. [2024-06-21 19:40:39,764 INFO L125 PetriNetUnfolderBase]: For 293129/293162 co-relation queries the response was YES. [2024-06-21 19:40:39,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41579 conditions, 5364 events. 3272/5364 cut-off events. For 293129/293162 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 33658 event pairs, 683 based on Foata normal form. 17/5372 useless extension candidates. Maximal degree in co-relation 41403. Up to 4711 conditions per place. [2024-06-21 19:40:39,842 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 485 selfloop transitions, 146 changer transitions 0/636 dead transitions. [2024-06-21 19:40:39,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 636 transitions, 11998 flow [2024-06-21 19:40:39,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:40:39,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:40:39,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-21 19:40:39,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2024-06-21 19:40:39,844 INFO L175 Difference]: Start difference. First operand has 424 places, 597 transitions, 10166 flow. Second operand 11 states and 174 transitions. [2024-06-21 19:40:39,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 636 transitions, 11998 flow [2024-06-21 19:40:41,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 636 transitions, 11736 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-21 19:40:41,194 INFO L231 Difference]: Finished difference. Result has 425 places, 614 transitions, 10546 flow [2024-06-21 19:40:41,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9904, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10546, PETRI_PLACES=425, PETRI_TRANSITIONS=614} [2024-06-21 19:40:41,195 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-21 19:40:41,195 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 614 transitions, 10546 flow [2024-06-21 19:40:41,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:41,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:41,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:41,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 19:40:41,195 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:40:41,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:41,196 INFO L85 PathProgramCache]: Analyzing trace with hash 674947014, now seen corresponding path program 12 times [2024-06-21 19:40:41,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:41,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885823270] [2024-06-21 19:40:41,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:41,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:47,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:47,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885823270] [2024-06-21 19:40:47,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885823270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:47,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:47,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:40:47,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498074570] [2024-06-21 19:40:47,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:47,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:40:47,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:47,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:40:47,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:40:47,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:40:47,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 614 transitions, 10546 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:47,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:47,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:40:47,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:40:50,514 INFO L124 PetriNetUnfolderBase]: 3269/5358 cut-off events. [2024-06-21 19:40:50,514 INFO L125 PetriNetUnfolderBase]: For 298628/298661 co-relation queries the response was YES. [2024-06-21 19:40:50,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41835 conditions, 5358 events. 3269/5358 cut-off events. For 298628/298661 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 33566 event pairs, 683 based on Foata normal form. 17/5366 useless extension candidates. Maximal degree in co-relation 41655. Up to 4708 conditions per place. [2024-06-21 19:40:50,591 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 485 selfloop transitions, 147 changer transitions 0/637 dead transitions. [2024-06-21 19:40:50,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 637 transitions, 12004 flow [2024-06-21 19:40:50,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:40:50,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:40:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 197 transitions. [2024-06-21 19:40:50,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3608058608058608 [2024-06-21 19:40:50,593 INFO L175 Difference]: Start difference. First operand has 425 places, 614 transitions, 10546 flow. Second operand 13 states and 197 transitions. [2024-06-21 19:40:50,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 637 transitions, 12004 flow [2024-06-21 19:40:51,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 637 transitions, 11793 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-21 19:40:51,942 INFO L231 Difference]: Finished difference. Result has 434 places, 614 transitions, 10635 flow [2024-06-21 19:40:51,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10335, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10635, PETRI_PLACES=434, PETRI_TRANSITIONS=614} [2024-06-21 19:40:51,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-21 19:40:51,944 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 614 transitions, 10635 flow [2024-06-21 19:40:51,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:51,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:40:51,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:40:51,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 19:40:51,945 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:40:51,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:40:51,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1015047844, now seen corresponding path program 6 times [2024-06-21 19:40:51,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:40:51,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072110477] [2024-06-21 19:40:51,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:40:51,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:40:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:40:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:40:57,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:40:57,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072110477] [2024-06-21 19:40:57,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072110477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:40:57,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:40:57,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:40:57,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645295765] [2024-06-21 19:40:57,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:40:57,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:40:57,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:40:57,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:40:57,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:40:57,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:40:57,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 614 transitions, 10635 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:40:57,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:40:57,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:40:57,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:00,649 INFO L124 PetriNetUnfolderBase]: 3266/5373 cut-off events. [2024-06-21 19:41:00,649 INFO L125 PetriNetUnfolderBase]: For 305509/305548 co-relation queries the response was YES. [2024-06-21 19:41:00,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41823 conditions, 5373 events. 3266/5373 cut-off events. For 305509/305548 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 33970 event pairs, 846 based on Foata normal form. 24/5392 useless extension candidates. Maximal degree in co-relation 41643. Up to 4793 conditions per place. [2024-06-21 19:41:00,718 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 502 selfloop transitions, 145 changer transitions 0/652 dead transitions. [2024-06-21 19:41:00,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 652 transitions, 12731 flow [2024-06-21 19:41:00,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:41:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:41:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 210 transitions. [2024-06-21 19:41:00,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-21 19:41:00,720 INFO L175 Difference]: Start difference. First operand has 434 places, 614 transitions, 10635 flow. Second operand 14 states and 210 transitions. [2024-06-21 19:41:00,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 652 transitions, 12731 flow [2024-06-21 19:41:01,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 652 transitions, 12427 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-21 19:41:01,926 INFO L231 Difference]: Finished difference. Result has 439 places, 622 transitions, 10789 flow [2024-06-21 19:41:01,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10331, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10789, PETRI_PLACES=439, PETRI_TRANSITIONS=622} [2024-06-21 19:41:01,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-21 19:41:01,926 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 622 transitions, 10789 flow [2024-06-21 19:41:01,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:01,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:01,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:01,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 19:41:01,927 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:41:01,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:01,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1858463366, now seen corresponding path program 13 times [2024-06-21 19:41:01,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:01,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743005623] [2024-06-21 19:41:01,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:01,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:08,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:08,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743005623] [2024-06-21 19:41:08,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743005623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:08,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:08,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:41:08,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420742412] [2024-06-21 19:41:08,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:08,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:41:08,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:08,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:41:08,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:41:08,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:41:08,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 622 transitions, 10789 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:08,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:08,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:41:08,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:10,918 INFO L124 PetriNetUnfolderBase]: 3320/5450 cut-off events. [2024-06-21 19:41:10,919 INFO L125 PetriNetUnfolderBase]: For 315311/315317 co-relation queries the response was YES. [2024-06-21 19:41:10,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42700 conditions, 5450 events. 3320/5450 cut-off events. For 315311/315317 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 34293 event pairs, 669 based on Foata normal form. 2/5445 useless extension candidates. Maximal degree in co-relation 42517. Up to 4501 conditions per place. [2024-06-21 19:41:11,009 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 429 selfloop transitions, 240 changer transitions 0/674 dead transitions. [2024-06-21 19:41:11,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 674 transitions, 12783 flow [2024-06-21 19:41:11,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:11,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:11,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 19:41:11,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 19:41:11,011 INFO L175 Difference]: Start difference. First operand has 439 places, 622 transitions, 10789 flow. Second operand 9 states and 163 transitions. [2024-06-21 19:41:11,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 674 transitions, 12783 flow [2024-06-21 19:41:12,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 674 transitions, 12636 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 19:41:12,536 INFO L231 Difference]: Finished difference. Result has 444 places, 642 transitions, 11445 flow [2024-06-21 19:41:12,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10642, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11445, PETRI_PLACES=444, PETRI_TRANSITIONS=642} [2024-06-21 19:41:12,537 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-21 19:41:12,537 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 642 transitions, 11445 flow [2024-06-21 19:41:12,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:12,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:12,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:12,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 19:41:12,539 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)] === [2024-06-21 19:41:12,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:12,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2101443544, now seen corresponding path program 14 times [2024-06-21 19:41:12,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:12,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854381354] [2024-06-21 19:41:12,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:12,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:18,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:18,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854381354] [2024-06-21 19:41:18,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854381354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:18,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:18,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:41:18,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557813932] [2024-06-21 19:41:18,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:18,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:41:18,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:18,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:41:18,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:41:18,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:41:18,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 642 transitions, 11445 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:18,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:18,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:41:18,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:20,752 INFO L124 PetriNetUnfolderBase]: 3330/5466 cut-off events. [2024-06-21 19:41:20,752 INFO L125 PetriNetUnfolderBase]: For 323460/323466 co-relation queries the response was YES. [2024-06-21 19:41:20,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43522 conditions, 5466 events. 3330/5466 cut-off events. For 323460/323466 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 34459 event pairs, 669 based on Foata normal form. 2/5461 useless extension candidates. Maximal degree in co-relation 43335. Up to 4511 conditions per place. [2024-06-21 19:41:20,828 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 428 selfloop transitions, 243 changer transitions 0/676 dead transitions. [2024-06-21 19:41:20,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 676 transitions, 13262 flow [2024-06-21 19:41:20,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:41:20,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:41:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 19:41:20,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 19:41:20,830 INFO L175 Difference]: Start difference. First operand has 444 places, 642 transitions, 11445 flow. Second operand 9 states and 160 transitions. [2024-06-21 19:41:20,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 676 transitions, 13262 flow [2024-06-21 19:41:22,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 676 transitions, 12839 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-21 19:41:22,604 INFO L231 Difference]: Finished difference. Result has 451 places, 649 transitions, 11663 flow [2024-06-21 19:41:22,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11053, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11663, PETRI_PLACES=451, PETRI_TRANSITIONS=649} [2024-06-21 19:41:22,614 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-21 19:41:22,614 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 649 transitions, 11663 flow [2024-06-21 19:41:22,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:22,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:22,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:22,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 19:41:22,615 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)] === [2024-06-21 19:41:22,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:22,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2101443172, now seen corresponding path program 7 times [2024-06-21 19:41:22,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:22,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26972384] [2024-06-21 19:41:22,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:22,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:31,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:31,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26972384] [2024-06-21 19:41:31,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26972384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:31,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:31,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:41:31,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132754340] [2024-06-21 19:41:31,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:31,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:41:31,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:31,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:41:31,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:41:31,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:41:31,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 649 transitions, 11663 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:31,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:31,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:41:31,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:34,014 INFO L124 PetriNetUnfolderBase]: 3359/5524 cut-off events. [2024-06-21 19:41:34,014 INFO L125 PetriNetUnfolderBase]: For 340767/340788 co-relation queries the response was YES. [2024-06-21 19:41:34,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44297 conditions, 5524 events. 3359/5524 cut-off events. For 340767/340788 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 35024 event pairs, 844 based on Foata normal form. 17/5537 useless extension candidates. Maximal degree in co-relation 44106. Up to 4920 conditions per place. [2024-06-21 19:41:34,093 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 553 selfloop transitions, 130 changer transitions 0/688 dead transitions. [2024-06-21 19:41:34,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 688 transitions, 13587 flow [2024-06-21 19:41:34,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:41:34,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:41:34,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-21 19:41:34,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3874458874458874 [2024-06-21 19:41:34,095 INFO L175 Difference]: Start difference. First operand has 451 places, 649 transitions, 11663 flow. Second operand 11 states and 179 transitions. [2024-06-21 19:41:34,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 688 transitions, 13587 flow [2024-06-21 19:41:35,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 688 transitions, 13254 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 19:41:35,804 INFO L231 Difference]: Finished difference. Result has 458 places, 658 transitions, 11766 flow [2024-06-21 19:41:35,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11330, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11766, PETRI_PLACES=458, PETRI_TRANSITIONS=658} [2024-06-21 19:41:35,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-21 19:41:35,805 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 658 transitions, 11766 flow [2024-06-21 19:41:35,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:35,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:35,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:35,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 19:41:35,806 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)] === [2024-06-21 19:41:35,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:35,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1746764422, now seen corresponding path program 8 times [2024-06-21 19:41:35,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:35,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534970738] [2024-06-21 19:41:35,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:35,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:39,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:39,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534970738] [2024-06-21 19:41:39,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534970738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:39,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:39,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:41:39,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342066413] [2024-06-21 19:41:39,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:39,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:41:39,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:39,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:41:39,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:41:39,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:41:39,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 658 transitions, 11766 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:39,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:39,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:41:39,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:41,788 INFO L124 PetriNetUnfolderBase]: 3422/5607 cut-off events. [2024-06-21 19:41:41,788 INFO L125 PetriNetUnfolderBase]: For 367776/367784 co-relation queries the response was YES. [2024-06-21 19:41:41,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45593 conditions, 5607 events. 3422/5607 cut-off events. For 367776/367784 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 35544 event pairs, 837 based on Foata normal form. 11/5616 useless extension candidates. Maximal degree in co-relation 45400. Up to 4604 conditions per place. [2024-06-21 19:41:41,870 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 406 selfloop transitions, 320 changer transitions 0/731 dead transitions. [2024-06-21 19:41:41,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 731 transitions, 14464 flow [2024-06-21 19:41:41,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:41:41,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:41:41,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 245 transitions. [2024-06-21 19:41:41,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 19:41:41,873 INFO L175 Difference]: Start difference. First operand has 458 places, 658 transitions, 11766 flow. Second operand 14 states and 245 transitions. [2024-06-21 19:41:41,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 731 transitions, 14464 flow [2024-06-21 19:41:43,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 731 transitions, 14214 flow, removed 76 selfloop flow, removed 6 redundant places. [2024-06-21 19:41:43,789 INFO L231 Difference]: Finished difference. Result has 468 places, 684 transitions, 12702 flow [2024-06-21 19:41:43,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11552, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12702, PETRI_PLACES=468, PETRI_TRANSITIONS=684} [2024-06-21 19:41:43,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 425 predicate places. [2024-06-21 19:41:43,790 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 684 transitions, 12702 flow [2024-06-21 19:41:43,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:43,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:43,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:43,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 19:41:43,790 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)] === [2024-06-21 19:41:43,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:43,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1342398650, now seen corresponding path program 9 times [2024-06-21 19:41:43,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:43,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748397271] [2024-06-21 19:41:43,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:43,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:48,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:48,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748397271] [2024-06-21 19:41:48,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748397271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:48,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:48,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:41:48,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341575320] [2024-06-21 19:41:48,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:48,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:41:48,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:48,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:41:48,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:41:48,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:41:48,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 684 transitions, 12702 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:48,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:48,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:41:48,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:41:51,238 INFO L124 PetriNetUnfolderBase]: 3419/5601 cut-off events. [2024-06-21 19:41:51,238 INFO L125 PetriNetUnfolderBase]: For 381653/381674 co-relation queries the response was YES. [2024-06-21 19:41:51,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46826 conditions, 5601 events. 3419/5601 cut-off events. For 381653/381674 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 35427 event pairs, 855 based on Foata normal form. 17/5614 useless extension candidates. Maximal degree in co-relation 46631. Up to 5016 conditions per place. [2024-06-21 19:41:51,324 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 575 selfloop transitions, 128 changer transitions 0/708 dead transitions. [2024-06-21 19:41:51,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 708 transitions, 14353 flow [2024-06-21 19:41:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:41:51,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:41:51,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-21 19:41:51,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-21 19:41:51,326 INFO L175 Difference]: Start difference. First operand has 468 places, 684 transitions, 12702 flow. Second operand 10 states and 161 transitions. [2024-06-21 19:41:51,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 708 transitions, 14353 flow [2024-06-21 19:41:53,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 708 transitions, 13739 flow, removed 149 selfloop flow, removed 10 redundant places. [2024-06-21 19:41:53,479 INFO L231 Difference]: Finished difference. Result has 468 places, 685 transitions, 12389 flow [2024-06-21 19:41:53,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12098, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12389, PETRI_PLACES=468, PETRI_TRANSITIONS=685} [2024-06-21 19:41:53,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 425 predicate places. [2024-06-21 19:41:53,479 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 685 transitions, 12389 flow [2024-06-21 19:41:53,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:53,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:41:53,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:41:53,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 19:41:53,480 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)] === [2024-06-21 19:41:53,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:41:53,481 INFO L85 PathProgramCache]: Analyzing trace with hash -2091266554, now seen corresponding path program 15 times [2024-06-21 19:41:53,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:41:53,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149723036] [2024-06-21 19:41:53,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:41:53,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:41:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:41:58,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:41:58,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:41:58,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149723036] [2024-06-21 19:41:58,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149723036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:41:58,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:41:58,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:41:58,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031654791] [2024-06-21 19:41:58,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:41:58,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:41:58,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:41:58,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:41:58,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:41:58,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:41:58,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 685 transitions, 12389 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:41:58,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:41:58,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:41:58,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:01,526 INFO L124 PetriNetUnfolderBase]: 3440/5626 cut-off events. [2024-06-21 19:42:01,526 INFO L125 PetriNetUnfolderBase]: For 392383/392389 co-relation queries the response was YES. [2024-06-21 19:42:01,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46733 conditions, 5626 events. 3440/5626 cut-off events. For 392383/392389 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 35414 event pairs, 673 based on Foata normal form. 2/5621 useless extension candidates. Maximal degree in co-relation 46538. Up to 4658 conditions per place. [2024-06-21 19:42:01,613 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 452 selfloop transitions, 260 changer transitions 0/717 dead transitions. [2024-06-21 19:42:01,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 717 transitions, 14347 flow [2024-06-21 19:42:01,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:42:01,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:42:01,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 19:42:01,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 19:42:01,615 INFO L175 Difference]: Start difference. First operand has 468 places, 685 transitions, 12389 flow. Second operand 9 states and 155 transitions. [2024-06-21 19:42:01,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 717 transitions, 14347 flow [2024-06-21 19:42:03,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 717 transitions, 14093 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 19:42:03,645 INFO L231 Difference]: Finished difference. Result has 472 places, 694 transitions, 12829 flow [2024-06-21 19:42:03,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12135, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12829, PETRI_PLACES=472, PETRI_TRANSITIONS=694} [2024-06-21 19:42:03,645 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-21 19:42:03,646 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 694 transitions, 12829 flow [2024-06-21 19:42:03,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:03,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:03,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:03,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 19:42:03,646 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)] === [2024-06-21 19:42:03,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:03,647 INFO L85 PathProgramCache]: Analyzing trace with hash -582105512, now seen corresponding path program 16 times [2024-06-21 19:42:03,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:03,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471542940] [2024-06-21 19:42:03,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:03,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:09,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:09,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471542940] [2024-06-21 19:42:09,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471542940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:09,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:09,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:42:09,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351877545] [2024-06-21 19:42:09,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:09,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:42:09,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:09,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:42:09,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:42:09,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:42:09,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 694 transitions, 12829 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:09,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:09,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:42:09,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:12,498 INFO L124 PetriNetUnfolderBase]: 3461/5661 cut-off events. [2024-06-21 19:42:12,499 INFO L125 PetriNetUnfolderBase]: For 412204/412210 co-relation queries the response was YES. [2024-06-21 19:42:12,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47681 conditions, 5661 events. 3461/5661 cut-off events. For 412204/412210 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 35745 event pairs, 672 based on Foata normal form. 2/5656 useless extension candidates. Maximal degree in co-relation 47484. Up to 4682 conditions per place. [2024-06-21 19:42:12,587 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 486 selfloop transitions, 246 changer transitions 0/737 dead transitions. [2024-06-21 19:42:12,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 737 transitions, 15066 flow [2024-06-21 19:42:12,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:42:12,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:42:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 19:42:12,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 19:42:12,589 INFO L175 Difference]: Start difference. First operand has 472 places, 694 transitions, 12829 flow. Second operand 9 states and 165 transitions. [2024-06-21 19:42:12,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 737 transitions, 15066 flow [2024-06-21 19:42:14,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 737 transitions, 14675 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 19:42:15,009 INFO L231 Difference]: Finished difference. Result has 477 places, 704 transitions, 13161 flow [2024-06-21 19:42:15,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12461, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13161, PETRI_PLACES=477, PETRI_TRANSITIONS=704} [2024-06-21 19:42:15,009 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 434 predicate places. [2024-06-21 19:42:15,010 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 704 transitions, 13161 flow [2024-06-21 19:42:15,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:15,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:15,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:15,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 19:42:15,010 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)] === [2024-06-21 19:42:15,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:15,011 INFO L85 PathProgramCache]: Analyzing trace with hash -576743132, now seen corresponding path program 17 times [2024-06-21 19:42:15,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:15,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739315523] [2024-06-21 19:42:15,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:15,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:21,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:21,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:21,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739315523] [2024-06-21 19:42:21,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739315523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:21,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:21,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:42:21,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196142248] [2024-06-21 19:42:21,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:21,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:42:21,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:21,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:42:21,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:42:21,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:42:21,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 704 transitions, 13161 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:21,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:21,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:42:21,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:24,242 INFO L124 PetriNetUnfolderBase]: 3466/5664 cut-off events. [2024-06-21 19:42:24,243 INFO L125 PetriNetUnfolderBase]: For 422815/422821 co-relation queries the response was YES. [2024-06-21 19:42:24,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47899 conditions, 5664 events. 3466/5664 cut-off events. For 422815/422821 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 35658 event pairs, 673 based on Foata normal form. 2/5659 useless extension candidates. Maximal degree in co-relation 47698. Up to 4688 conditions per place. [2024-06-21 19:42:24,335 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 492 selfloop transitions, 244 changer transitions 0/741 dead transitions. [2024-06-21 19:42:24,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 741 transitions, 15432 flow [2024-06-21 19:42:24,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:42:24,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:42:24,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 19:42:24,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 19:42:24,337 INFO L175 Difference]: Start difference. First operand has 477 places, 704 transitions, 13161 flow. Second operand 9 states and 167 transitions. [2024-06-21 19:42:24,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 741 transitions, 15432 flow [2024-06-21 19:42:26,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 741 transitions, 15041 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-21 19:42:26,438 INFO L231 Difference]: Finished difference. Result has 483 places, 708 transitions, 13364 flow [2024-06-21 19:42:26,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12789, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13364, PETRI_PLACES=483, PETRI_TRANSITIONS=708} [2024-06-21 19:42:26,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 440 predicate places. [2024-06-21 19:42:26,439 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 708 transitions, 13364 flow [2024-06-21 19:42:26,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:26,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:26,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:26,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 19:42:26,440 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)] === [2024-06-21 19:42:26,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:26,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1787374056, now seen corresponding path program 18 times [2024-06-21 19:42:26,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:26,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809868227] [2024-06-21 19:42:26,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:26,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:32,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:32,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809868227] [2024-06-21 19:42:32,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809868227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:32,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:32,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:42:32,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461598643] [2024-06-21 19:42:32,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:32,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:42:32,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:32,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:42:32,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:42:32,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:42:32,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 708 transitions, 13364 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:32,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:32,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:42:32,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:35,423 INFO L124 PetriNetUnfolderBase]: 3476/5682 cut-off events. [2024-06-21 19:42:35,423 INFO L125 PetriNetUnfolderBase]: For 434585/434591 co-relation queries the response was YES. [2024-06-21 19:42:35,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48123 conditions, 5682 events. 3476/5682 cut-off events. For 434585/434591 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 35842 event pairs, 673 based on Foata normal form. 2/5677 useless extension candidates. Maximal degree in co-relation 47919. Up to 5032 conditions per place. [2024-06-21 19:42:35,515 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 608 selfloop transitions, 126 changer transitions 0/739 dead transitions. [2024-06-21 19:42:35,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 739 transitions, 14991 flow [2024-06-21 19:42:35,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:42:35,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:42:35,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 19:42:35,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 19:42:35,517 INFO L175 Difference]: Start difference. First operand has 483 places, 708 transitions, 13364 flow. Second operand 9 states and 154 transitions. [2024-06-21 19:42:35,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 739 transitions, 14991 flow [2024-06-21 19:42:37,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 739 transitions, 14455 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 19:42:37,909 INFO L231 Difference]: Finished difference. Result has 487 places, 714 transitions, 13191 flow [2024-06-21 19:42:37,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12838, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13191, PETRI_PLACES=487, PETRI_TRANSITIONS=714} [2024-06-21 19:42:37,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 444 predicate places. [2024-06-21 19:42:37,910 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 714 transitions, 13191 flow [2024-06-21 19:42:37,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:37,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:37,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:37,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 19:42:37,910 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)] === [2024-06-21 19:42:37,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:37,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1778257824, now seen corresponding path program 10 times [2024-06-21 19:42:37,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:37,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246313818] [2024-06-21 19:42:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:37,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:43,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:43,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246313818] [2024-06-21 19:42:43,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246313818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:43,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:43,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:42:43,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771671779] [2024-06-21 19:42:43,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:43,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:42:43,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:43,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:42:43,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:42:43,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:42:43,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 714 transitions, 13191 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:43,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:43,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:42:43,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:46,519 INFO L124 PetriNetUnfolderBase]: 3473/5699 cut-off events. [2024-06-21 19:42:46,519 INFO L125 PetriNetUnfolderBase]: For 436637/436658 co-relation queries the response was YES. [2024-06-21 19:42:46,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47781 conditions, 5699 events. 3473/5699 cut-off events. For 436637/436658 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 36361 event pairs, 843 based on Foata normal form. 17/5712 useless extension candidates. Maximal degree in co-relation 47576. Up to 5010 conditions per place. [2024-06-21 19:42:46,613 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 587 selfloop transitions, 156 changer transitions 0/748 dead transitions. [2024-06-21 19:42:46,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 748 transitions, 15346 flow [2024-06-21 19:42:46,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:42:46,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:42:46,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-21 19:42:46,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 19:42:46,615 INFO L175 Difference]: Start difference. First operand has 487 places, 714 transitions, 13191 flow. Second operand 12 states and 195 transitions. [2024-06-21 19:42:46,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 748 transitions, 15346 flow [2024-06-21 19:42:48,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 748 transitions, 15036 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 19:42:48,994 INFO L231 Difference]: Finished difference. Result has 492 places, 715 transitions, 13230 flow [2024-06-21 19:42:48,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12881, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13230, PETRI_PLACES=492, PETRI_TRANSITIONS=715} [2024-06-21 19:42:48,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 449 predicate places. [2024-06-21 19:42:48,995 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 715 transitions, 13230 flow [2024-06-21 19:42:48,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:48,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:42:48,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:42:48,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 19:42:48,996 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)] === [2024-06-21 19:42:48,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:42:48,996 INFO L85 PathProgramCache]: Analyzing trace with hash -576444602, now seen corresponding path program 19 times [2024-06-21 19:42:48,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:42:48,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349939953] [2024-06-21 19:42:48,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:42:48,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:42:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:42:55,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:42:55,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:42:55,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349939953] [2024-06-21 19:42:55,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349939953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:42:55,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:42:55,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:42:55,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697130007] [2024-06-21 19:42:55,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:42:55,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:42:55,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:42:55,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:42:55,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:42:55,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:42:55,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 715 transitions, 13230 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:42:55,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:42:55,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:42:55,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:42:58,555 INFO L124 PetriNetUnfolderBase]: 3470/5678 cut-off events. [2024-06-21 19:42:58,555 INFO L125 PetriNetUnfolderBase]: For 440573/440579 co-relation queries the response was YES. [2024-06-21 19:42:58,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47818 conditions, 5678 events. 3470/5678 cut-off events. For 440573/440579 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 35875 event pairs, 671 based on Foata normal form. 2/5673 useless extension candidates. Maximal degree in co-relation 47611. Up to 4691 conditions per place. [2024-06-21 19:42:58,651 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 490 selfloop transitions, 248 changer transitions 0/743 dead transitions. [2024-06-21 19:42:58,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 743 transitions, 15270 flow [2024-06-21 19:42:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:42:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:42:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 19:42:58,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:42:58,653 INFO L175 Difference]: Start difference. First operand has 492 places, 715 transitions, 13230 flow. Second operand 9 states and 162 transitions. [2024-06-21 19:42:58,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 743 transitions, 15270 flow [2024-06-21 19:43:01,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 743 transitions, 14785 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-21 19:43:01,175 INFO L231 Difference]: Finished difference. Result has 492 places, 715 transitions, 13247 flow [2024-06-21 19:43:01,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12745, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13247, PETRI_PLACES=492, PETRI_TRANSITIONS=715} [2024-06-21 19:43:01,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 449 predicate places. [2024-06-21 19:43:01,176 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 715 transitions, 13247 flow [2024-06-21 19:43:01,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:01,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:01,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:01,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 19:43:01,176 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)] === [2024-06-21 19:43:01,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:01,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1778119626, now seen corresponding path program 20 times [2024-06-21 19:43:01,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:01,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78667263] [2024-06-21 19:43:01,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:01,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:07,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:07,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78667263] [2024-06-21 19:43:07,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78667263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:07,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:07,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:43:07,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988963314] [2024-06-21 19:43:07,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:07,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:43:07,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:07,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:43:07,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:43:08,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:43:08,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 715 transitions, 13247 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:08,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:08,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:43:08,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:10,972 INFO L124 PetriNetUnfolderBase]: 3467/5666 cut-off events. [2024-06-21 19:43:10,972 INFO L125 PetriNetUnfolderBase]: For 449089/449095 co-relation queries the response was YES. [2024-06-21 19:43:11,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47697 conditions, 5666 events. 3467/5666 cut-off events. For 449089/449095 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 35780 event pairs, 671 based on Foata normal form. 2/5661 useless extension candidates. Maximal degree in co-relation 47490. Up to 5010 conditions per place. [2024-06-21 19:43:11,215 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 601 selfloop transitions, 133 changer transitions 0/739 dead transitions. [2024-06-21 19:43:11,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 739 transitions, 14939 flow [2024-06-21 19:43:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:43:11,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:43:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 185 transitions. [2024-06-21 19:43:11,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36706349206349204 [2024-06-21 19:43:11,217 INFO L175 Difference]: Start difference. First operand has 492 places, 715 transitions, 13247 flow. Second operand 12 states and 185 transitions. [2024-06-21 19:43:11,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 739 transitions, 14939 flow [2024-06-21 19:43:13,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 739 transitions, 14466 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 19:43:13,274 INFO L231 Difference]: Finished difference. Result has 499 places, 715 transitions, 13046 flow [2024-06-21 19:43:13,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12774, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13046, PETRI_PLACES=499, PETRI_TRANSITIONS=715} [2024-06-21 19:43:13,275 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 456 predicate places. [2024-06-21 19:43:13,275 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 715 transitions, 13046 flow [2024-06-21 19:43:13,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:13,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:13,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:13,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 19:43:13,276 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)] === [2024-06-21 19:43:13,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:13,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1778113674, now seen corresponding path program 11 times [2024-06-21 19:43:13,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:13,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629705881] [2024-06-21 19:43:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:13,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:19,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:19,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629705881] [2024-06-21 19:43:19,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629705881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:19,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:19,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:43:19,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060421675] [2024-06-21 19:43:19,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:19,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:43:19,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:19,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:43:19,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:43:19,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:43:19,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 715 transitions, 13046 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:19,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:19,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:43:19,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:22,316 INFO L124 PetriNetUnfolderBase]: 3472/5699 cut-off events. [2024-06-21 19:43:22,316 INFO L125 PetriNetUnfolderBase]: For 456282/456303 co-relation queries the response was YES. [2024-06-21 19:43:22,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47588 conditions, 5699 events. 3472/5699 cut-off events. For 456282/456303 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 36335 event pairs, 843 based on Foata normal form. 17/5712 useless extension candidates. Maximal degree in co-relation 47380. Up to 5165 conditions per place. [2024-06-21 19:43:22,406 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 653 selfloop transitions, 86 changer transitions 0/744 dead transitions. [2024-06-21 19:43:22,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 744 transitions, 15156 flow [2024-06-21 19:43:22,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:43:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:43:22,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-21 19:43:22,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-21 19:43:22,408 INFO L175 Difference]: Start difference. First operand has 499 places, 715 transitions, 13046 flow. Second operand 11 states and 177 transitions. [2024-06-21 19:43:22,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 744 transitions, 15156 flow [2024-06-21 19:43:24,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 744 transitions, 14835 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 19:43:24,838 INFO L231 Difference]: Finished difference. Result has 502 places, 718 transitions, 12967 flow [2024-06-21 19:43:24,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12725, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12967, PETRI_PLACES=502, PETRI_TRANSITIONS=718} [2024-06-21 19:43:24,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 459 predicate places. [2024-06-21 19:43:24,838 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 718 transitions, 12967 flow [2024-06-21 19:43:24,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:24,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:24,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:24,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 19:43:24,839 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)] === [2024-06-21 19:43:24,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:24,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1448596166, now seen corresponding path program 21 times [2024-06-21 19:43:24,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:24,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489164438] [2024-06-21 19:43:24,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:24,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:33,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:33,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489164438] [2024-06-21 19:43:33,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489164438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:33,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:33,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:43:33,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813925819] [2024-06-21 19:43:33,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:33,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:43:33,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:33,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:43:33,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:43:33,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:43:33,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 718 transitions, 12967 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:33,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:33,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:43:33,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:35,749 INFO L124 PetriNetUnfolderBase]: 3469/5671 cut-off events. [2024-06-21 19:43:35,750 INFO L125 PetriNetUnfolderBase]: For 459541/459547 co-relation queries the response was YES. [2024-06-21 19:43:35,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47402 conditions, 5671 events. 3469/5671 cut-off events. For 459541/459547 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 35816 event pairs, 671 based on Foata normal form. 2/5666 useless extension candidates. Maximal degree in co-relation 47194. Up to 5014 conditions per place. [2024-06-21 19:43:35,834 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 602 selfloop transitions, 132 changer transitions 0/739 dead transitions. [2024-06-21 19:43:35,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 739 transitions, 14485 flow [2024-06-21 19:43:35,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:43:35,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:43:35,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 19:43:35,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 19:43:35,836 INFO L175 Difference]: Start difference. First operand has 502 places, 718 transitions, 12967 flow. Second operand 9 states and 152 transitions. [2024-06-21 19:43:35,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 739 transitions, 14485 flow [2024-06-21 19:43:38,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 739 transitions, 14255 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-21 19:43:38,267 INFO L231 Difference]: Finished difference. Result has 502 places, 718 transitions, 13007 flow [2024-06-21 19:43:38,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12737, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13007, PETRI_PLACES=502, PETRI_TRANSITIONS=718} [2024-06-21 19:43:38,267 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 459 predicate places. [2024-06-21 19:43:38,268 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 718 transitions, 13007 flow [2024-06-21 19:43:38,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:38,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:38,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:38,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 19:43:38,268 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)] === [2024-06-21 19:43:38,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:38,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1778108094, now seen corresponding path program 12 times [2024-06-21 19:43:38,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:38,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296292144] [2024-06-21 19:43:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:38,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:44,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:44,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296292144] [2024-06-21 19:43:44,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296292144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:44,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:44,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:43:44,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509160088] [2024-06-21 19:43:44,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:44,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:43:44,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:44,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:43:44,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:43:44,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:43:44,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 718 transitions, 13007 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:44,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:44,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:43:44,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:43:48,198 INFO L124 PetriNetUnfolderBase]: 3466/5694 cut-off events. [2024-06-21 19:43:48,198 INFO L125 PetriNetUnfolderBase]: For 466899/466920 co-relation queries the response was YES. [2024-06-21 19:43:48,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47498 conditions, 5694 events. 3466/5694 cut-off events. For 466899/466920 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 36300 event pairs, 842 based on Foata normal form. 17/5707 useless extension candidates. Maximal degree in co-relation 47289. Up to 5159 conditions per place. [2024-06-21 19:43:48,301 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 653 selfloop transitions, 88 changer transitions 0/746 dead transitions. [2024-06-21 19:43:48,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 746 transitions, 15075 flow [2024-06-21 19:43:48,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:43:48,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:43:48,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 199 transitions. [2024-06-21 19:43:48,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36446886446886445 [2024-06-21 19:43:48,316 INFO L175 Difference]: Start difference. First operand has 502 places, 718 transitions, 13007 flow. Second operand 13 states and 199 transitions. [2024-06-21 19:43:48,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 746 transitions, 15075 flow [2024-06-21 19:43:51,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 746 transitions, 14783 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 19:43:51,043 INFO L231 Difference]: Finished difference. Result has 507 places, 718 transitions, 12897 flow [2024-06-21 19:43:51,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12715, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12897, PETRI_PLACES=507, PETRI_TRANSITIONS=718} [2024-06-21 19:43:51,044 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 464 predicate places. [2024-06-21 19:43:51,044 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 718 transitions, 12897 flow [2024-06-21 19:43:51,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:51,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:43:51,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:43:51,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 19:43:51,044 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)] === [2024-06-21 19:43:51,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:43:51,045 INFO L85 PathProgramCache]: Analyzing trace with hash -572719363, now seen corresponding path program 1 times [2024-06-21 19:43:51,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:43:51,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742591430] [2024-06-21 19:43:51,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:43:51,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:43:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:43:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:43:57,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:43:57,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742591430] [2024-06-21 19:43:57,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742591430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:43:57,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:43:57,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:43:57,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108610990] [2024-06-21 19:43:57,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:43:57,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:43:57,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:43:57,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:43:57,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:43:57,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:43:57,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 718 transitions, 12897 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:43:57,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:43:57,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:43:57,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:00,229 INFO L124 PetriNetUnfolderBase]: 3463/5687 cut-off events. [2024-06-21 19:44:00,229 INFO L125 PetriNetUnfolderBase]: For 470565/470586 co-relation queries the response was YES. [2024-06-21 19:44:00,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47311 conditions, 5687 events. 3463/5687 cut-off events. For 470565/470586 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 36219 event pairs, 843 based on Foata normal form. 17/5700 useless extension candidates. Maximal degree in co-relation 47101. Up to 5174 conditions per place. [2024-06-21 19:44:00,317 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 660 selfloop transitions, 75 changer transitions 0/740 dead transitions. [2024-06-21 19:44:00,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 740 transitions, 14595 flow [2024-06-21 19:44:00,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:44:00,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:44:00,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 19:44:00,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-21 19:44:00,319 INFO L175 Difference]: Start difference. First operand has 507 places, 718 transitions, 12897 flow. Second operand 9 states and 149 transitions. [2024-06-21 19:44:00,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 740 transitions, 14595 flow [2024-06-21 19:44:03,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 740 transitions, 14379 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-21 19:44:03,094 INFO L231 Difference]: Finished difference. Result has 505 places, 718 transitions, 12839 flow [2024-06-21 19:44:03,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12681, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12839, PETRI_PLACES=505, PETRI_TRANSITIONS=718} [2024-06-21 19:44:03,095 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 462 predicate places. [2024-06-21 19:44:03,095 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 718 transitions, 12839 flow [2024-06-21 19:44:03,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:03,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:03,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:03,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 19:44:03,096 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)] === [2024-06-21 19:44:03,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:03,096 INFO L85 PathProgramCache]: Analyzing trace with hash 621457252, now seen corresponding path program 22 times [2024-06-21 19:44:03,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:03,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787741890] [2024-06-21 19:44:03,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:03,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:44:08,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:08,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787741890] [2024-06-21 19:44:08,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787741890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:08,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:08,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:44:08,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825273156] [2024-06-21 19:44:08,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:08,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:44:08,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:08,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:44:08,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:44:08,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:44:08,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 718 transitions, 12839 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:08,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:08,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:44:08,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:11,744 INFO L124 PetriNetUnfolderBase]: 3512/5745 cut-off events. [2024-06-21 19:44:11,745 INFO L125 PetriNetUnfolderBase]: For 492050/492056 co-relation queries the response was YES. [2024-06-21 19:44:11,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48120 conditions, 5745 events. 3512/5745 cut-off events. For 492050/492056 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 36389 event pairs, 670 based on Foata normal form. 2/5740 useless extension candidates. Maximal degree in co-relation 47910. Up to 5022 conditions per place. [2024-06-21 19:44:11,834 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 571 selfloop transitions, 183 changer transitions 0/759 dead transitions. [2024-06-21 19:44:11,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 759 transitions, 14959 flow [2024-06-21 19:44:11,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:44:11,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:44:11,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-21 19:44:11,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-21 19:44:11,836 INFO L175 Difference]: Start difference. First operand has 505 places, 718 transitions, 12839 flow. Second operand 10 states and 157 transitions. [2024-06-21 19:44:11,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 759 transitions, 14959 flow [2024-06-21 19:44:14,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 759 transitions, 14805 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 19:44:14,460 INFO L231 Difference]: Finished difference. Result has 507 places, 741 transitions, 13528 flow [2024-06-21 19:44:14,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12685, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13528, PETRI_PLACES=507, PETRI_TRANSITIONS=741} [2024-06-21 19:44:14,461 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 464 predicate places. [2024-06-21 19:44:14,461 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 741 transitions, 13528 flow [2024-06-21 19:44:14,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:14,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:14,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:14,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 19:44:14,462 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)] === [2024-06-21 19:44:14,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:14,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1819500285, now seen corresponding path program 2 times [2024-06-21 19:44:14,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:14,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428906632] [2024-06-21 19:44:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:14,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:44:21,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:21,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428906632] [2024-06-21 19:44:21,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428906632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:21,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:21,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:44:21,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070892726] [2024-06-21 19:44:21,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:21,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:44:21,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:21,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:44:21,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:44:21,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:44:21,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 741 transitions, 13528 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:21,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:21,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:44:21,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:23,619 INFO L124 PetriNetUnfolderBase]: 3509/5763 cut-off events. [2024-06-21 19:44:23,619 INFO L125 PetriNetUnfolderBase]: For 500355/500376 co-relation queries the response was YES. [2024-06-21 19:44:23,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48521 conditions, 5763 events. 3509/5763 cut-off events. For 500355/500376 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 36884 event pairs, 844 based on Foata normal form. 17/5776 useless extension candidates. Maximal degree in co-relation 48309. Up to 5252 conditions per place. [2024-06-21 19:44:23,704 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 686 selfloop transitions, 66 changer transitions 0/757 dead transitions. [2024-06-21 19:44:23,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 757 transitions, 15070 flow [2024-06-21 19:44:23,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:44:23,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:44:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-21 19:44:23,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-21 19:44:23,705 INFO L175 Difference]: Start difference. First operand has 507 places, 741 transitions, 13528 flow. Second operand 9 states and 139 transitions. [2024-06-21 19:44:23,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 757 transitions, 15070 flow [2024-06-21 19:44:26,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 757 transitions, 14814 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 19:44:26,270 INFO L231 Difference]: Finished difference. Result has 512 places, 741 transitions, 13412 flow [2024-06-21 19:44:26,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13272, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13412, PETRI_PLACES=512, PETRI_TRANSITIONS=741} [2024-06-21 19:44:26,271 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 469 predicate places. [2024-06-21 19:44:26,271 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 741 transitions, 13412 flow [2024-06-21 19:44:26,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:26,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:26,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:26,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 19:44:26,272 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)] === [2024-06-21 19:44:26,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:26,272 INFO L85 PathProgramCache]: Analyzing trace with hash 626998378, now seen corresponding path program 1 times [2024-06-21 19:44:26,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:26,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050875852] [2024-06-21 19:44:26,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:26,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:44:30,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:30,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050875852] [2024-06-21 19:44:30,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050875852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:30,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:30,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:44:30,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757132547] [2024-06-21 19:44:30,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:30,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:44:30,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:30,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:44:30,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:44:30,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:44:30,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 741 transitions, 13412 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:30,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:30,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:44:30,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:32,996 INFO L124 PetriNetUnfolderBase]: 3549/5807 cut-off events. [2024-06-21 19:44:32,996 INFO L125 PetriNetUnfolderBase]: For 512543/512543 co-relation queries the response was YES. [2024-06-21 19:44:33,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48857 conditions, 5807 events. 3549/5807 cut-off events. For 512543/512543 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 36878 event pairs, 651 based on Foata normal form. 2/5807 useless extension candidates. Maximal degree in co-relation 48644. Up to 4775 conditions per place. [2024-06-21 19:44:33,095 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 546 selfloop transitions, 241 changer transitions 0/792 dead transitions. [2024-06-21 19:44:33,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 792 transitions, 15569 flow [2024-06-21 19:44:33,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:44:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:44:33,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 216 transitions. [2024-06-21 19:44:33,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956043956043956 [2024-06-21 19:44:33,097 INFO L175 Difference]: Start difference. First operand has 512 places, 741 transitions, 13412 flow. Second operand 13 states and 216 transitions. [2024-06-21 19:44:33,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 792 transitions, 15569 flow [2024-06-21 19:44:35,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 792 transitions, 15437 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 19:44:36,140 INFO L231 Difference]: Finished difference. Result has 517 places, 756 transitions, 13984 flow [2024-06-21 19:44:36,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13280, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=13984, PETRI_PLACES=517, PETRI_TRANSITIONS=756} [2024-06-21 19:44:36,141 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 474 predicate places. [2024-06-21 19:44:36,141 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 756 transitions, 13984 flow [2024-06-21 19:44:36,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:36,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:36,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:36,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 19:44:36,141 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)] === [2024-06-21 19:44:36,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:36,141 INFO L85 PathProgramCache]: Analyzing trace with hash 614111554, now seen corresponding path program 13 times [2024-06-21 19:44:36,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:36,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938240394] [2024-06-21 19:44:36,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:36,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:44:42,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:42,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938240394] [2024-06-21 19:44:42,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938240394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:42,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:42,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:44:42,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872774533] [2024-06-21 19:44:42,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:42,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:44:42,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:42,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:44:42,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:44:42,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:44:42,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 756 transitions, 13984 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:42,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:42,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:44:42,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:45,617 INFO L124 PetriNetUnfolderBase]: 3570/5858 cut-off events. [2024-06-21 19:44:45,618 INFO L125 PetriNetUnfolderBase]: For 531975/531996 co-relation queries the response was YES. [2024-06-21 19:44:45,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50254 conditions, 5858 events. 3570/5858 cut-off events. For 531975/531996 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 37496 event pairs, 847 based on Foata normal form. 17/5871 useless extension candidates. Maximal degree in co-relation 50040. Up to 5311 conditions per place. [2024-06-21 19:44:45,714 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 690 selfloop transitions, 90 changer transitions 0/785 dead transitions. [2024-06-21 19:44:45,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 785 transitions, 15932 flow [2024-06-21 19:44:45,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:44:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:44:45,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 181 transitions. [2024-06-21 19:44:45,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35912698412698413 [2024-06-21 19:44:45,716 INFO L175 Difference]: Start difference. First operand has 517 places, 756 transitions, 13984 flow. Second operand 12 states and 181 transitions. [2024-06-21 19:44:45,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 785 transitions, 15932 flow [2024-06-21 19:44:48,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 785 transitions, 15711 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-21 19:44:48,501 INFO L231 Difference]: Finished difference. Result has 521 places, 764 transitions, 14126 flow [2024-06-21 19:44:48,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13763, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14126, PETRI_PLACES=521, PETRI_TRANSITIONS=764} [2024-06-21 19:44:48,502 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 478 predicate places. [2024-06-21 19:44:48,502 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 764 transitions, 14126 flow [2024-06-21 19:44:48,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:48,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:44:48,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:44:48,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 19:44:48,503 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)] === [2024-06-21 19:44:48,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:44:48,511 INFO L85 PathProgramCache]: Analyzing trace with hash 614100022, now seen corresponding path program 23 times [2024-06-21 19:44:48,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:44:48,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211102924] [2024-06-21 19:44:48,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:44:48,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:44:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:44:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:44:54,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:44:54,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211102924] [2024-06-21 19:44:54,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211102924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:44:54,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:44:54,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:44:54,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644751067] [2024-06-21 19:44:54,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:44:54,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:44:54,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:44:54,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:44:54,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:44:54,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:44:54,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 764 transitions, 14126 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:44:54,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:44:54,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:44:54,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:44:58,750 INFO L124 PetriNetUnfolderBase]: 3567/5818 cut-off events. [2024-06-21 19:44:58,750 INFO L125 PetriNetUnfolderBase]: For 535513/535519 co-relation queries the response was YES. [2024-06-21 19:44:58,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50466 conditions, 5818 events. 3567/5818 cut-off events. For 535513/535519 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 36783 event pairs, 674 based on Foata normal form. 2/5813 useless extension candidates. Maximal degree in co-relation 50249. Up to 5100 conditions per place. [2024-06-21 19:44:58,836 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 595 selfloop transitions, 186 changer transitions 0/786 dead transitions. [2024-06-21 19:44:58,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 786 transitions, 16110 flow [2024-06-21 19:44:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:44:58,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:44:58,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 186 transitions. [2024-06-21 19:44:58,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-21 19:44:58,838 INFO L175 Difference]: Start difference. First operand has 521 places, 764 transitions, 14126 flow. Second operand 12 states and 186 transitions. [2024-06-21 19:44:58,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 786 transitions, 16110 flow [2024-06-21 19:45:02,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 786 transitions, 15942 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 19:45:02,198 INFO L231 Difference]: Finished difference. Result has 526 places, 764 transitions, 14336 flow [2024-06-21 19:45:02,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13958, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14336, PETRI_PLACES=526, PETRI_TRANSITIONS=764} [2024-06-21 19:45:02,201 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 483 predicate places. [2024-06-21 19:45:02,201 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 764 transitions, 14336 flow [2024-06-21 19:45:02,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:02,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:02,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:02,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 19:45:02,201 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)] === [2024-06-21 19:45:02,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:02,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1819494116, now seen corresponding path program 24 times [2024-06-21 19:45:02,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:02,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004213858] [2024-06-21 19:45:02,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:02,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:10,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:10,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004213858] [2024-06-21 19:45:10,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004213858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:10,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:10,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:45:10,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772705496] [2024-06-21 19:45:10,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:10,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:45:10,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:10,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:45:10,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:45:10,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:45:10,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 764 transitions, 14336 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:10,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:10,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:45:10,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:15,149 INFO L124 PetriNetUnfolderBase]: 3564/5816 cut-off events. [2024-06-21 19:45:15,150 INFO L125 PetriNetUnfolderBase]: For 541147/541153 co-relation queries the response was YES. [2024-06-21 19:45:15,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50810 conditions, 5816 events. 3564/5816 cut-off events. For 541147/541153 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 36774 event pairs, 676 based on Foata normal form. 2/5811 useless extension candidates. Maximal degree in co-relation 50591. Up to 5097 conditions per place. [2024-06-21 19:45:15,255 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 595 selfloop transitions, 184 changer transitions 0/784 dead transitions. [2024-06-21 19:45:15,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 784 transitions, 16128 flow [2024-06-21 19:45:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:45:15,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:45:15,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-21 19:45:15,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 19:45:15,257 INFO L175 Difference]: Start difference. First operand has 526 places, 764 transitions, 14336 flow. Second operand 11 states and 176 transitions. [2024-06-21 19:45:15,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 784 transitions, 16128 flow [2024-06-21 19:45:18,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 784 transitions, 15785 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 19:45:18,889 INFO L231 Difference]: Finished difference. Result has 530 places, 764 transitions, 14367 flow [2024-06-21 19:45:18,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13993, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14367, PETRI_PLACES=530, PETRI_TRANSITIONS=764} [2024-06-21 19:45:18,890 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 487 predicate places. [2024-06-21 19:45:18,890 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 764 transitions, 14367 flow [2024-06-21 19:45:18,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:18,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:18,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:18,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 19:45:18,891 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)] === [2024-06-21 19:45:18,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:18,892 INFO L85 PathProgramCache]: Analyzing trace with hash 626998564, now seen corresponding path program 14 times [2024-06-21 19:45:18,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:18,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768118193] [2024-06-21 19:45:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:18,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:23,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:23,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768118193] [2024-06-21 19:45:23,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768118193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:23,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:23,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:45:23,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167024623] [2024-06-21 19:45:23,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:23,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:45:23,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:23,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:45:23,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:45:23,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:45:23,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 764 transitions, 14367 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:23,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:23,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:45:23,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:28,089 INFO L124 PetriNetUnfolderBase]: 3640/5953 cut-off events. [2024-06-21 19:45:28,090 INFO L125 PetriNetUnfolderBase]: For 592307/592315 co-relation queries the response was YES. [2024-06-21 19:45:28,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52392 conditions, 5953 events. 3640/5953 cut-off events. For 592307/592315 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 38059 event pairs, 847 based on Foata normal form. 11/5962 useless extension candidates. Maximal degree in co-relation 52172. Up to 5147 conditions per place. [2024-06-21 19:45:28,190 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 568 selfloop transitions, 263 changer transitions 0/836 dead transitions. [2024-06-21 19:45:28,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 836 transitions, 17528 flow [2024-06-21 19:45:28,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-21 19:45:28,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-21 19:45:28,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 286 transitions. [2024-06-21 19:45:28,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-21 19:45:28,193 INFO L175 Difference]: Start difference. First operand has 530 places, 764 transitions, 14367 flow. Second operand 18 states and 286 transitions. [2024-06-21 19:45:28,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 836 transitions, 17528 flow [2024-06-21 19:45:31,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 836 transitions, 17178 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 19:45:31,515 INFO L231 Difference]: Finished difference. Result has 542 places, 794 transitions, 15327 flow [2024-06-21 19:45:31,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14017, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=15327, PETRI_PLACES=542, PETRI_TRANSITIONS=794} [2024-06-21 19:45:31,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 499 predicate places. [2024-06-21 19:45:31,516 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 794 transitions, 15327 flow [2024-06-21 19:45:31,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:31,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:31,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:31,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 19:45:31,516 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)] === [2024-06-21 19:45:31,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:31,517 INFO L85 PathProgramCache]: Analyzing trace with hash 621873334, now seen corresponding path program 15 times [2024-06-21 19:45:31,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:31,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448346290] [2024-06-21 19:45:31,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:31,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:36,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:36,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448346290] [2024-06-21 19:45:36,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448346290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:36,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:36,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:45:36,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743536912] [2024-06-21 19:45:36,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:36,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:45:36,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:36,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:45:36,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:45:36,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:45:36,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 794 transitions, 15327 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:36,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:36,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:45:36,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:39,514 INFO L124 PetriNetUnfolderBase]: 3658/5988 cut-off events. [2024-06-21 19:45:39,515 INFO L125 PetriNetUnfolderBase]: For 627718/627726 co-relation queries the response was YES. [2024-06-21 19:45:39,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53685 conditions, 5988 events. 3658/5988 cut-off events. For 627718/627726 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 38396 event pairs, 850 based on Foata normal form. 10/5996 useless extension candidates. Maximal degree in co-relation 53460. Up to 5163 conditions per place. [2024-06-21 19:45:39,613 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 581 selfloop transitions, 252 changer transitions 0/838 dead transitions. [2024-06-21 19:45:39,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 838 transitions, 17871 flow [2024-06-21 19:45:39,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:45:39,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:45:39,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 219 transitions. [2024-06-21 19:45:39,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010989010989011 [2024-06-21 19:45:39,615 INFO L175 Difference]: Start difference. First operand has 542 places, 794 transitions, 15327 flow. Second operand 13 states and 219 transitions. [2024-06-21 19:45:39,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 838 transitions, 17871 flow [2024-06-21 19:45:42,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 838 transitions, 17168 flow, removed 216 selfloop flow, removed 10 redundant places. [2024-06-21 19:45:42,856 INFO L231 Difference]: Finished difference. Result has 547 places, 803 transitions, 15375 flow [2024-06-21 19:45:42,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14694, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=15375, PETRI_PLACES=547, PETRI_TRANSITIONS=803} [2024-06-21 19:45:42,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 504 predicate places. [2024-06-21 19:45:42,857 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 803 transitions, 15375 flow [2024-06-21 19:45:42,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:42,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:42,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:42,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 19:45:42,858 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)] === [2024-06-21 19:45:42,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:42,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1826846138, now seen corresponding path program 16 times [2024-06-21 19:45:42,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:42,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581416417] [2024-06-21 19:45:42,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:42,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:49,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:49,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581416417] [2024-06-21 19:45:49,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581416417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:49,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:49,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:45:49,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867760783] [2024-06-21 19:45:49,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:49,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:45:49,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:49,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:45:49,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:45:49,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:45:49,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 803 transitions, 15375 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:49,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:49,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:45:49,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:52,294 INFO L124 PetriNetUnfolderBase]: 3655/5986 cut-off events. [2024-06-21 19:45:52,294 INFO L125 PetriNetUnfolderBase]: For 628644/628665 co-relation queries the response was YES. [2024-06-21 19:45:52,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53405 conditions, 5986 events. 3655/5986 cut-off events. For 628644/628665 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 38358 event pairs, 845 based on Foata normal form. 17/5999 useless extension candidates. Maximal degree in co-relation 53177. Up to 5436 conditions per place. [2024-06-21 19:45:52,386 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 734 selfloop transitions, 84 changer transitions 0/823 dead transitions. [2024-06-21 19:45:52,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 823 transitions, 17293 flow [2024-06-21 19:45:52,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:45:52,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:45:52,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 164 transitions. [2024-06-21 19:45:52,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.354978354978355 [2024-06-21 19:45:52,388 INFO L175 Difference]: Start difference. First operand has 547 places, 803 transitions, 15375 flow. Second operand 11 states and 164 transitions. [2024-06-21 19:45:52,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 823 transitions, 17293 flow [2024-06-21 19:45:55,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 823 transitions, 16867 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 19:45:55,650 INFO L231 Difference]: Finished difference. Result has 550 places, 804 transitions, 15165 flow [2024-06-21 19:45:55,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14949, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15165, PETRI_PLACES=550, PETRI_TRANSITIONS=804} [2024-06-21 19:45:55,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 507 predicate places. [2024-06-21 19:45:55,651 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 804 transitions, 15165 flow [2024-06-21 19:45:55,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:55,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:55,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:55,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 19:45:55,652 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)] === [2024-06-21 19:45:55,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:55,652 INFO L85 PathProgramCache]: Analyzing trace with hash 976778314, now seen corresponding path program 1 times [2024-06-21 19:45:55,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:55,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195146863] [2024-06-21 19:45:55,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:55,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:01,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:01,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195146863] [2024-06-21 19:46:01,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195146863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:01,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:01,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:46:01,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443891148] [2024-06-21 19:46:01,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:01,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:46:01,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:01,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:46:01,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:46:01,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:46:01,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 804 transitions, 15165 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:01,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:01,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:46:01,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:03,947 INFO L124 PetriNetUnfolderBase]: 3683/6007 cut-off events. [2024-06-21 19:46:03,948 INFO L125 PetriNetUnfolderBase]: For 652901/652909 co-relation queries the response was YES. [2024-06-21 19:46:04,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53728 conditions, 6007 events. 3683/6007 cut-off events. For 652901/652909 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 38301 event pairs, 850 based on Foata normal form. 12/6017 useless extension candidates. Maximal degree in co-relation 53499. Up to 5195 conditions per place. [2024-06-21 19:46:04,045 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 582 selfloop transitions, 268 changer transitions 0/855 dead transitions. [2024-06-21 19:46:04,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 855 transitions, 17812 flow [2024-06-21 19:46:04,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 19:46:04,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 19:46:04,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 242 transitions. [2024-06-21 19:46:04,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38412698412698415 [2024-06-21 19:46:04,047 INFO L175 Difference]: Start difference. First operand has 550 places, 804 transitions, 15165 flow. Second operand 15 states and 242 transitions. [2024-06-21 19:46:04,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 855 transitions, 17812 flow [2024-06-21 19:46:07,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 855 transitions, 17576 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-21 19:46:07,708 INFO L231 Difference]: Finished difference. Result has 556 places, 818 transitions, 15740 flow [2024-06-21 19:46:07,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14922, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=15740, PETRI_PLACES=556, PETRI_TRANSITIONS=818} [2024-06-21 19:46:07,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 513 predicate places. [2024-06-21 19:46:07,709 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 818 transitions, 15740 flow [2024-06-21 19:46:07,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:07,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:07,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:07,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 19:46:07,709 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)] === [2024-06-21 19:46:07,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:07,710 INFO L85 PathProgramCache]: Analyzing trace with hash -257238470, now seen corresponding path program 17 times [2024-06-21 19:46:07,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:07,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934149794] [2024-06-21 19:46:07,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:07,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:13,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:13,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934149794] [2024-06-21 19:46:13,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934149794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:13,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:13,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:46:13,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552795107] [2024-06-21 19:46:13,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:13,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:46:13,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:13,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:46:13,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:46:13,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:46:13,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 818 transitions, 15740 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:13,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:13,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:46:13,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:17,049 INFO L124 PetriNetUnfolderBase]: 3680/6019 cut-off events. [2024-06-21 19:46:17,049 INFO L125 PetriNetUnfolderBase]: For 655666/655687 co-relation queries the response was YES. [2024-06-21 19:46:17,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54085 conditions, 6019 events. 3680/6019 cut-off events. For 655666/655687 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 38575 event pairs, 845 based on Foata normal form. 17/6032 useless extension candidates. Maximal degree in co-relation 53856. Up to 5449 conditions per place. [2024-06-21 19:46:17,150 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 736 selfloop transitions, 100 changer transitions 0/841 dead transitions. [2024-06-21 19:46:17,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 841 transitions, 17868 flow [2024-06-21 19:46:17,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:46:17,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:46:17,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 204 transitions. [2024-06-21 19:46:17,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3469387755102041 [2024-06-21 19:46:17,152 INFO L175 Difference]: Start difference. First operand has 556 places, 818 transitions, 15740 flow. Second operand 14 states and 204 transitions. [2024-06-21 19:46:17,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 841 transitions, 17868 flow [2024-06-21 19:46:21,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 841 transitions, 17304 flow, removed 38 selfloop flow, removed 10 redundant places. [2024-06-21 19:46:21,096 INFO L231 Difference]: Finished difference. Result has 560 places, 818 transitions, 15382 flow [2024-06-21 19:46:21,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15176, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=718, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=15382, PETRI_PLACES=560, PETRI_TRANSITIONS=818} [2024-06-21 19:46:21,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 517 predicate places. [2024-06-21 19:46:21,097 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 818 transitions, 15382 flow [2024-06-21 19:46:21,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:21,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:21,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:21,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 19:46:21,098 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)] === [2024-06-21 19:46:21,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:21,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1130856710, now seen corresponding path program 18 times [2024-06-21 19:46:21,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:21,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631848375] [2024-06-21 19:46:21,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:21,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15