./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.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/mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 19:05:13,664 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 19:05:13,725 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 19:05:13,729 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 19:05:13,730 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 19:05:13,753 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 19:05:13,753 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 19:05:13,754 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 19:05:13,754 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 19:05:13,757 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 19:05:13,757 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 19:05:13,757 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 19:05:13,758 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 19:05:13,759 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 19:05:13,759 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 19:05:13,760 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 19:05:13,760 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 19:05:13,760 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 19:05:13,760 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 19:05:13,760 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 19:05:13,761 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 19:05:13,761 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 19:05:13,761 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 19:05:13,761 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 19:05:13,762 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 19:05:13,762 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 19:05:13,762 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 19:05:13,762 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 19:05:13,763 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 19:05:13,763 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 19:05:13,764 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 19:05:13,764 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 19:05:13,764 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:05:13,764 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 19:05:13,764 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 19:05:13,764 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 19:05:13,765 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 19:05:13,765 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 19:05:13,765 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 19:05:13,765 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 19:05:13,765 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 19:05:13,766 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 19:05:13,766 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 19:05:13,766 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 19:05:13,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 19:05:14,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 19:05:14,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 19:05:14,010 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 19:05:14,011 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 19:05:14,011 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-21 19:05:14,088 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 19:05:14,088 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 19:05:14,088 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-21 19:05:15,037 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 19:05:15,243 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 19:05:15,247 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-21 19:05:15,267 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad49fc0c2/a21461de2a8b4eaeb60f0b68b9ee1979/FLAGd2d8d29e2 [2024-06-21 19:05:15,281 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad49fc0c2/a21461de2a8b4eaeb60f0b68b9ee1979 [2024-06-21 19:05:15,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 19:05:15,282 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 19:05:15,284 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 19:05:15,284 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 19:05:15,288 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 19:05:15,288 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:05:14" (1/2) ... [2024-06-21 19:05:15,289 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69c1c916 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:05:15, skipping insertion in model container [2024-06-21 19:05:15,290 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:05:14" (1/2) ... [2024-06-21 19:05:15,291 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@11d1d2af and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:05:15, skipping insertion in model container [2024-06-21 19:05:15,292 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:05:15" (2/2) ... [2024-06-21 19:05:15,293 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69c1c916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:05:15, skipping insertion in model container [2024-06-21 19:05:15,293 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:05:15" (2/2) ... [2024-06-21 19:05:15,294 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 19:05:15,313 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 19:05:15,314 INFO L97 edCorrectnessWitness]: Location invariant before [L829-L829] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 19:05:15,314 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 19:05:15,315 INFO L97 edCorrectnessWitness]: Location invariant before [L828-L828] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )y$r_buff0_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff0 >= 0LL) && (0LL - (long long )y$r_buff1_thd3) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )y$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )a >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$r_buff1_thd3 >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff0_used >= 0LL) && (long long )y$r_buff0_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$r_buff1_thd3 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff0_used >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1 >= 0LL) && (long long )y$w_buff0 - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff0_used - (long long )y$w_buff1_used >= 0LL) && (long long )y$w_buff1 - (long long )y$w_buff1_used >= 0LL) [2024-06-21 19:05:15,315 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 19:05:15,315 INFO L106 edCorrectnessWitness]: ghost_update [L824-L824] multithreaded = 1; [2024-06-21 19:05:15,351 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 19:05:15,612 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:05:15,621 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 19:05:15,733 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:05:15,781 INFO L206 MainTranslator]: Completed translation [2024-06-21 19:05:15,783 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:05:15 WrapperNode [2024-06-21 19:05:15,783 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 19:05:15,784 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 19:05:15,784 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 19:05:15,784 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 19:05:15,789 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:05:15" (1/1) ... [2024-06-21 19:05:15,813 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:05:15" (1/1) ... [2024-06-21 19:05:15,896 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 151 [2024-06-21 19:05:15,897 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 19:05:15,898 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 19:05:15,898 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 19:05:15,898 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 19:05:15,907 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:05:15" (1/1) ... [2024-06-21 19:05:15,907 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:05:15" (1/1) ... [2024-06-21 19:05:15,918 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:05:15" (1/1) ... [2024-06-21 19:05:15,940 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 19:05:15,946 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:05:15" (1/1) ... [2024-06-21 19:05:15,946 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:05:15" (1/1) ... [2024-06-21 19:05:15,957 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:05:15" (1/1) ... [2024-06-21 19:05:15,979 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:05:15" (1/1) ... [2024-06-21 19:05:15,982 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:05:15" (1/1) ... [2024-06-21 19:05:15,984 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:05:15" (1/1) ... [2024-06-21 19:05:15,988 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 19:05:15,988 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 19:05:15,988 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 19:05:15,989 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 19:05:15,989 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:05:15" (1/1) ... [2024-06-21 19:05:15,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:05:15,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 19:05:16,046 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 19:05:16,052 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 19:05:16,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 19:05:16,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 19:05:16,074 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 19:05:16,075 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 19:05:16,075 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 19:05:16,075 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 19:05:16,075 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 19:05:16,075 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 19:05:16,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 19:05:16,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 19:05:16,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 19:05:16,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 19:05:16,076 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 19:05:16,170 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 19:05:16,171 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 19:05:16,490 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 19:05:16,490 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 19:05:16,647 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 19:05:16,647 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 19:05:16,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:05:16 BoogieIcfgContainer [2024-06-21 19:05:16,648 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 19:05:16,651 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 19:05:16,651 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 19:05:16,653 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 19:05:16,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:05:14" (1/4) ... [2024-06-21 19:05:16,654 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b29e94c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:05:16, skipping insertion in model container [2024-06-21 19:05:16,654 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 07:05:15" (2/4) ... [2024-06-21 19:05:16,654 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b29e94c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:05:16, skipping insertion in model container [2024-06-21 19:05:16,654 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:05:15" (3/4) ... [2024-06-21 19:05:16,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b29e94c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:05:16, skipping insertion in model container [2024-06-21 19:05:16,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:05:16" (4/4) ... [2024-06-21 19:05:16,658 INFO L112 eAbstractionObserver]: Analyzing ICFG mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-21 19:05:16,672 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 19:05:16,672 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 19:05:16,673 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 19:05:16,716 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 19:05:16,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 19:05:16,773 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 19:05:16,773 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:05:16,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 19:05:16,776 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 19:05:16,779 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 19:05:16,790 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 19:05:16,797 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;@33dff7b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 19:05:16,797 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 19:05:16,802 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 19:05:16,802 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 19:05:16,802 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:05:16,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:16,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 19:05:16,803 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 19:05:16,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:16,809 INFO L85 PathProgramCache]: Analyzing trace with hash 368893735, now seen corresponding path program 1 times [2024-06-21 19:05:16,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:16,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537049073] [2024-06-21 19:05:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:16,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:17,796 INFO 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 19:05:17,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:17,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537049073] [2024-06-21 19:05:17,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537049073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:17,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:17,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 19:05:17,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23542867] [2024-06-21 19:05:17,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:17,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 19:05:17,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:17,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 19:05:17,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 19:05:17,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 19:05:17,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 19:05:17,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:17,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 19:05:17,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:18,212 INFO L124 PetriNetUnfolderBase]: 1359/2149 cut-off events. [2024-06-21 19:05:18,212 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 19:05:18,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4263 conditions, 2149 events. 1359/2149 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10665 event pairs, 941 based on Foata normal form. 1/2073 useless extension candidates. Maximal degree in co-relation 4251. Up to 2029 conditions per place. [2024-06-21 19:05:18,225 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 32 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-21 19:05:18,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 173 flow [2024-06-21 19:05:18,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 19:05:18,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 19:05:18,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-06-21 19:05:18,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-21 19:05:18,254 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 75 transitions. [2024-06-21 19:05:18,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 173 flow [2024-06-21 19:05:18,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 19:05:18,260 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 19:05:18,261 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 19:05:18,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 19:05:18,264 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 19:05:18,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 19:05:18,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:18,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:18,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 19:05:18,265 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 19:05:18,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:18,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1975373562, now seen corresponding path program 1 times [2024-06-21 19:05:18,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:18,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113484636] [2024-06-21 19:05:18,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:18,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:18,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:18,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113484636] [2024-06-21 19:05:18,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113484636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:18,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:18,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 19:05:18,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816748393] [2024-06-21 19:05:18,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:18,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 19:05:18,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:18,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 19:05:18,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 19:05:19,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 19:05:19,008 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 19:05:19,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:19,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 19:05:19,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:19,282 INFO L124 PetriNetUnfolderBase]: 1560/2387 cut-off events. [2024-06-21 19:05:19,282 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2024-06-21 19:05:19,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5403 conditions, 2387 events. 1560/2387 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11610 event pairs, 930 based on Foata normal form. 3/2352 useless extension candidates. Maximal degree in co-relation 5391. Up to 2302 conditions per place. [2024-06-21 19:05:19,293 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 40 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-21 19:05:19,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 242 flow [2024-06-21 19:05:19,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:05:19,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:05:19,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-21 19:05:19,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-21 19:05:19,298 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 94 transitions. [2024-06-21 19:05:19,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 242 flow [2024-06-21 19:05:19,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 19:05:19,301 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 19:05:19,301 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 19:05:19,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 19:05:19,302 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 19:05:19,302 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 19:05:19,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:19,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:19,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 19:05:19,305 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 19:05:19,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:19,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1107037196, now seen corresponding path program 1 times [2024-06-21 19:05:19,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:19,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814331316] [2024-06-21 19:05:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:19,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:19,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:19,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:19,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814331316] [2024-06-21 19:05:19,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814331316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:19,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:19,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:05:19,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896843051] [2024-06-21 19:05:19,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:19,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:05:19,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:19,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:05:19,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:05:20,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 19:05:20,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 19:05:20,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:20,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 19:05:20,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:20,371 INFO L124 PetriNetUnfolderBase]: 1568/2406 cut-off events. [2024-06-21 19:05:20,371 INFO L125 PetriNetUnfolderBase]: For 1320/1320 co-relation queries the response was YES. [2024-06-21 19:05:20,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6039 conditions, 2406 events. 1568/2406 cut-off events. For 1320/1320 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11798 event pairs, 669 based on Foata normal form. 5/2390 useless extension candidates. Maximal degree in co-relation 6025. Up to 2248 conditions per place. [2024-06-21 19:05:20,383 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 53 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-21 19:05:20,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 75 transitions, 396 flow [2024-06-21 19:05:20,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:05:20,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:05:20,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 19:05:20,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-21 19:05:20,388 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 123 transitions. [2024-06-21 19:05:20,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 75 transitions, 396 flow [2024-06-21 19:05:20,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 382 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 19:05:20,391 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-21 19:05:20,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-21 19:05:20,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-21 19:05:20,393 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-21 19:05:20,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 19:05:20,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:20,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:20,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 19:05:20,394 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:20,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:20,394 INFO L85 PathProgramCache]: Analyzing trace with hash 2146270291, now seen corresponding path program 1 times [2024-06-21 19:05:20,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:20,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189598017] [2024-06-21 19:05:20,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:20,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:21,285 INFO 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 19:05:21,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:21,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189598017] [2024-06-21 19:05:21,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189598017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:21,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:21,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:05:21,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358193787] [2024-06-21 19:05:21,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:21,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:05:21,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:21,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:05:21,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:05:21,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 19:05:21,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:21,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:21,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 19:05:21,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:21,694 INFO L124 PetriNetUnfolderBase]: 1580/2426 cut-off events. [2024-06-21 19:05:21,694 INFO L125 PetriNetUnfolderBase]: For 3144/3147 co-relation queries the response was YES. [2024-06-21 19:05:21,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7183 conditions, 2426 events. 1580/2426 cut-off events. For 3144/3147 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11893 event pairs, 481 based on Foata normal form. 12/2417 useless extension candidates. Maximal degree in co-relation 7166. Up to 2216 conditions per place. [2024-06-21 19:05:21,707 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 57 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-21 19:05:21,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 82 transitions, 499 flow [2024-06-21 19:05:21,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:05:21,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:05:21,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 19:05:21,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-21 19:05:21,709 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 141 transitions. [2024-06-21 19:05:21,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 82 transitions, 499 flow [2024-06-21 19:05:21,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 82 transitions, 491 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 19:05:21,716 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 293 flow [2024-06-21 19:05:21,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-21 19:05:21,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-21 19:05:21,718 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 293 flow [2024-06-21 19:05:21,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:21,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:21,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:21,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 19:05:21,719 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 19:05:21,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:21,719 INFO L85 PathProgramCache]: Analyzing trace with hash 706560531, now seen corresponding path program 1 times [2024-06-21 19:05:21,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:21,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437099152] [2024-06-21 19:05:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:21,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:22,584 INFO 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 19:05:22,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:22,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437099152] [2024-06-21 19:05:22,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437099152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:22,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:22,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:05:22,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678418608] [2024-06-21 19:05:22,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:22,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:05:22,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:22,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:05:22,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:05:22,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:05:22,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 293 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:22,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:22,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:05:22,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:23,076 INFO L124 PetriNetUnfolderBase]: 1368/2164 cut-off events. [2024-06-21 19:05:23,077 INFO L125 PetriNetUnfolderBase]: For 4021/4021 co-relation queries the response was YES. [2024-06-21 19:05:23,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6935 conditions, 2164 events. 1368/2164 cut-off events. For 4021/4021 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10905 event pairs, 562 based on Foata normal form. 2/2133 useless extension candidates. Maximal degree in co-relation 6914. Up to 2036 conditions per place. [2024-06-21 19:05:23,091 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 48 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-21 19:05:23,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 449 flow [2024-06-21 19:05:23,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:05:23,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:05:23,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-21 19:05:23,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 19:05:23,092 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 293 flow. Second operand 5 states and 96 transitions. [2024-06-21 19:05:23,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 449 flow [2024-06-21 19:05:23,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 64 transitions, 397 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 19:05:23,100 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 290 flow [2024-06-21 19:05:23,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=290, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-21 19:05:23,102 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-21 19:05:23,102 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 290 flow [2024-06-21 19:05:23,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:23,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:23,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:23,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 19:05:23,104 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 19:05:23,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:23,104 INFO L85 PathProgramCache]: Analyzing trace with hash 413751189, now seen corresponding path program 1 times [2024-06-21 19:05:23,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:23,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383829126] [2024-06-21 19:05:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:23,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:24,078 INFO 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 19:05:24,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:24,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383829126] [2024-06-21 19:05:24,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383829126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:24,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:24,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:05:24,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849087771] [2024-06-21 19:05:24,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:24,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:05:24,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:24,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:05:24,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:05:24,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:05:24,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 290 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:24,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:24,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:05:24,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:24,700 INFO L124 PetriNetUnfolderBase]: 1358/2222 cut-off events. [2024-06-21 19:05:24,700 INFO L125 PetriNetUnfolderBase]: For 4714/4714 co-relation queries the response was YES. [2024-06-21 19:05:24,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6999 conditions, 2222 events. 1358/2222 cut-off events. For 4714/4714 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11525 event pairs, 526 based on Foata normal form. 4/2215 useless extension candidates. Maximal degree in co-relation 6974. Up to 2004 conditions per place. [2024-06-21 19:05:24,713 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 53 selfloop transitions, 13 changer transitions 0/72 dead transitions. [2024-06-21 19:05:24,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 478 flow [2024-06-21 19:05:24,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:05:24,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:05:24,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 19:05:24,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 19:05:24,715 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 290 flow. Second operand 6 states and 114 transitions. [2024-06-21 19:05:24,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 478 flow [2024-06-21 19:05:24,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 459 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 19:05:24,720 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 331 flow [2024-06-21 19:05:24,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-21 19:05:24,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-21 19:05:24,722 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 331 flow [2024-06-21 19:05:24,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:24,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:24,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:24,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 19:05:24,723 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 19:05:24,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:24,724 INFO L85 PathProgramCache]: Analyzing trace with hash 384460754, now seen corresponding path program 1 times [2024-06-21 19:05:24,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:24,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797428172] [2024-06-21 19:05:24,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:24,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:25,724 INFO 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 19:05:25,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:25,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797428172] [2024-06-21 19:05:25,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797428172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:25,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:25,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:05:25,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838536966] [2024-06-21 19:05:25,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:25,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:05:25,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:25,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:05:25,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:05:25,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:25,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 331 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:25,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:25,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:25,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:26,336 INFO L124 PetriNetUnfolderBase]: 1641/2561 cut-off events. [2024-06-21 19:05:26,337 INFO L125 PetriNetUnfolderBase]: For 7410/7416 co-relation queries the response was YES. [2024-06-21 19:05:26,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8885 conditions, 2561 events. 1641/2561 cut-off events. For 7410/7416 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12666 event pairs, 694 based on Foata normal form. 8/2549 useless extension candidates. Maximal degree in co-relation 8858. Up to 2307 conditions per place. [2024-06-21 19:05:26,357 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 59 selfloop transitions, 29 changer transitions 0/93 dead transitions. [2024-06-21 19:05:26,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 93 transitions, 713 flow [2024-06-21 19:05:26,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:05:26,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:05:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-21 19:05:26,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4801587301587302 [2024-06-21 19:05:26,359 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 331 flow. Second operand 6 states and 121 transitions. [2024-06-21 19:05:26,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 93 transitions, 713 flow [2024-06-21 19:05:26,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 93 transitions, 683 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 19:05:26,365 INFO L231 Difference]: Finished difference. Result has 65 places, 71 transitions, 478 flow [2024-06-21 19:05:26,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=478, PETRI_PLACES=65, PETRI_TRANSITIONS=71} [2024-06-21 19:05:26,366 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2024-06-21 19:05:26,366 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 71 transitions, 478 flow [2024-06-21 19:05:26,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:26,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:26,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:26,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 19:05:26,367 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 19:05:26,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:26,367 INFO L85 PathProgramCache]: Analyzing trace with hash 399861554, now seen corresponding path program 2 times [2024-06-21 19:05:26,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:26,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178567044] [2024-06-21 19:05:26,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:26,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:27,337 INFO 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 19:05:27,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:27,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178567044] [2024-06-21 19:05:27,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178567044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:27,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:27,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:05:27,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663854454] [2024-06-21 19:05:27,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:27,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:05:27,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:27,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:05:27,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:05:27,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:27,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 71 transitions, 478 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:27,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:27,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:27,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:27,965 INFO L124 PetriNetUnfolderBase]: 1633/2539 cut-off events. [2024-06-21 19:05:27,965 INFO L125 PetriNetUnfolderBase]: For 8984/8986 co-relation queries the response was YES. [2024-06-21 19:05:27,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9217 conditions, 2539 events. 1633/2539 cut-off events. For 8984/8986 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12436 event pairs, 696 based on Foata normal form. 4/2521 useless extension candidates. Maximal degree in co-relation 9187. Up to 2299 conditions per place. [2024-06-21 19:05:27,980 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 51 selfloop transitions, 33 changer transitions 0/89 dead transitions. [2024-06-21 19:05:27,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 89 transitions, 732 flow [2024-06-21 19:05:27,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:05:27,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:05:27,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-21 19:05:27,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 19:05:27,981 INFO L175 Difference]: Start difference. First operand has 65 places, 71 transitions, 478 flow. Second operand 6 states and 117 transitions. [2024-06-21 19:05:27,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 89 transitions, 732 flow [2024-06-21 19:05:27,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 89 transitions, 701 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-21 19:05:27,990 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 531 flow [2024-06-21 19:05:27,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=531, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2024-06-21 19:05:27,990 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-21 19:05:27,991 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 531 flow [2024-06-21 19:05:27,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:27,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:27,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:27,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 19:05:27,991 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 19:05:27,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:27,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1994533264, now seen corresponding path program 3 times [2024-06-21 19:05:27,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:27,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001243357] [2024-06-21 19:05:27,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:27,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:28,711 INFO 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 19:05:28,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:28,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001243357] [2024-06-21 19:05:28,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001243357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:28,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:28,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:05:28,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422785318] [2024-06-21 19:05:28,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:28,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:05:28,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:28,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:05:28,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:05:28,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:28,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 531 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:28,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:28,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:28,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:29,251 INFO L124 PetriNetUnfolderBase]: 1672/2599 cut-off events. [2024-06-21 19:05:29,252 INFO L125 PetriNetUnfolderBase]: For 11275/11283 co-relation queries the response was YES. [2024-06-21 19:05:29,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9808 conditions, 2599 events. 1672/2599 cut-off events. For 11275/11283 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12824 event pairs, 684 based on Foata normal form. 10/2595 useless extension candidates. Maximal degree in co-relation 9775. Up to 2324 conditions per place. [2024-06-21 19:05:29,287 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 62 selfloop transitions, 44 changer transitions 0/111 dead transitions. [2024-06-21 19:05:29,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 111 transitions, 982 flow [2024-06-21 19:05:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:05:29,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:05:29,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-21 19:05:29,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-21 19:05:29,289 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 531 flow. Second operand 6 states and 124 transitions. [2024-06-21 19:05:29,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 111 transitions, 982 flow [2024-06-21 19:05:29,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 111 transitions, 927 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 19:05:29,300 INFO L231 Difference]: Finished difference. Result has 76 places, 88 transitions, 780 flow [2024-06-21 19:05:29,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=780, PETRI_PLACES=76, PETRI_TRANSITIONS=88} [2024-06-21 19:05:29,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-21 19:05:29,302 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 88 transitions, 780 flow [2024-06-21 19:05:29,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:29,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:29,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:29,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 19:05:29,302 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 19:05:29,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:29,303 INFO L85 PathProgramCache]: Analyzing trace with hash -18068258, now seen corresponding path program 1 times [2024-06-21 19:05:29,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:29,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555975839] [2024-06-21 19:05:29,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:29,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:30,517 INFO 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 19:05:30,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:30,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555975839] [2024-06-21 19:05:30,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555975839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:30,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:30,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:05:30,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207330420] [2024-06-21 19:05:30,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:30,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:05:30,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:30,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:05:30,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:05:30,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:30,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 88 transitions, 780 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:30,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:30,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:30,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:31,220 INFO L124 PetriNetUnfolderBase]: 1780/2754 cut-off events. [2024-06-21 19:05:31,220 INFO L125 PetriNetUnfolderBase]: For 14853/14861 co-relation queries the response was YES. [2024-06-21 19:05:31,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10866 conditions, 2754 events. 1780/2754 cut-off events. For 14853/14861 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 13574 event pairs, 485 based on Foata normal form. 11/2741 useless extension candidates. Maximal degree in co-relation 10830. Up to 2259 conditions per place. [2024-06-21 19:05:31,235 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 73 selfloop transitions, 50 changer transitions 0/128 dead transitions. [2024-06-21 19:05:31,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 128 transitions, 1266 flow [2024-06-21 19:05:31,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:05:31,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:05:31,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 19:05:31,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-21 19:05:31,236 INFO L175 Difference]: Start difference. First operand has 76 places, 88 transitions, 780 flow. Second operand 7 states and 143 transitions. [2024-06-21 19:05:31,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 128 transitions, 1266 flow [2024-06-21 19:05:31,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 128 transitions, 1162 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 19:05:31,249 INFO L231 Difference]: Finished difference. Result has 78 places, 98 transitions, 865 flow [2024-06-21 19:05:31,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=865, PETRI_PLACES=78, PETRI_TRANSITIONS=98} [2024-06-21 19:05:31,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-21 19:05:31,250 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 98 transitions, 865 flow [2024-06-21 19:05:31,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:31,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:31,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:31,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 19:05:31,250 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 19:05:31,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:31,251 INFO L85 PathProgramCache]: Analyzing trace with hash -489192716, now seen corresponding path program 2 times [2024-06-21 19:05:31,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:31,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235833767] [2024-06-21 19:05:31,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:31,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:32,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:32,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:32,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235833767] [2024-06-21 19:05:32,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235833767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:32,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:32,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:05:32,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725151004] [2024-06-21 19:05:32,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:32,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:05:32,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:32,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:05:32,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:05:32,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:32,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 98 transitions, 865 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:32,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:32,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:32,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:33,238 INFO L124 PetriNetUnfolderBase]: 1834/2829 cut-off events. [2024-06-21 19:05:33,238 INFO L125 PetriNetUnfolderBase]: For 18292/18294 co-relation queries the response was YES. [2024-06-21 19:05:33,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11984 conditions, 2829 events. 1834/2829 cut-off events. For 18292/18294 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 13936 event pairs, 474 based on Foata normal form. 6/2800 useless extension candidates. Maximal degree in co-relation 11947. Up to 2295 conditions per place. [2024-06-21 19:05:33,254 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 71 selfloop transitions, 63 changer transitions 0/139 dead transitions. [2024-06-21 19:05:33,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 139 transitions, 1436 flow [2024-06-21 19:05:33,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:05:33,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:05:33,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-21 19:05:33,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-21 19:05:33,256 INFO L175 Difference]: Start difference. First operand has 78 places, 98 transitions, 865 flow. Second operand 7 states and 144 transitions. [2024-06-21 19:05:33,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 139 transitions, 1436 flow [2024-06-21 19:05:33,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 139 transitions, 1409 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 19:05:33,275 INFO L231 Difference]: Finished difference. Result has 83 places, 108 transitions, 1067 flow [2024-06-21 19:05:33,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1067, PETRI_PLACES=83, PETRI_TRANSITIONS=108} [2024-06-21 19:05:33,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-21 19:05:33,276 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 108 transitions, 1067 flow [2024-06-21 19:05:33,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:33,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:33,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:33,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 19:05:33,276 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 19:05:33,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:33,277 INFO L85 PathProgramCache]: Analyzing trace with hash -959951276, now seen corresponding path program 3 times [2024-06-21 19:05:33,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:33,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417129806] [2024-06-21 19:05:33,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:33,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:34,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:34,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417129806] [2024-06-21 19:05:34,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417129806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:34,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:34,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:05:34,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625184172] [2024-06-21 19:05:34,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:34,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:05:34,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:34,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:05:34,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:05:34,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:34,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 108 transitions, 1067 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:34,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:34,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:34,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:35,205 INFO L124 PetriNetUnfolderBase]: 1824/2815 cut-off events. [2024-06-21 19:05:35,205 INFO L125 PetriNetUnfolderBase]: For 21962/21964 co-relation queries the response was YES. [2024-06-21 19:05:35,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12571 conditions, 2815 events. 1824/2815 cut-off events. For 21962/21964 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 13897 event pairs, 474 based on Foata normal form. 6/2786 useless extension candidates. Maximal degree in co-relation 12530. Up to 2291 conditions per place. [2024-06-21 19:05:35,218 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 63 selfloop transitions, 67 changer transitions 0/135 dead transitions. [2024-06-21 19:05:35,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 135 transitions, 1496 flow [2024-06-21 19:05:35,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:05:35,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:05:35,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 19:05:35,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-06-21 19:05:35,219 INFO L175 Difference]: Start difference. First operand has 83 places, 108 transitions, 1067 flow. Second operand 7 states and 141 transitions. [2024-06-21 19:05:35,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 135 transitions, 1496 flow [2024-06-21 19:05:35,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 135 transitions, 1468 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-21 19:05:35,242 INFO L231 Difference]: Finished difference. Result has 89 places, 108 transitions, 1183 flow [2024-06-21 19:05:35,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1183, PETRI_PLACES=89, PETRI_TRANSITIONS=108} [2024-06-21 19:05:35,242 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-21 19:05:35,242 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 108 transitions, 1183 flow [2024-06-21 19:05:35,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:35,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:35,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:35,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 19:05:35,243 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 19:05:35,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:35,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1715289718, now seen corresponding path program 4 times [2024-06-21 19:05:35,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:35,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086677806] [2024-06-21 19:05:35,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:35,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:36,164 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 19:05:36,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:36,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086677806] [2024-06-21 19:05:36,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086677806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:36,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:36,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:05:36,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979507105] [2024-06-21 19:05:36,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:36,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:05:36,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:36,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:05:36,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:05:36,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:36,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 108 transitions, 1183 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:36,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:36,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:36,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:36,897 INFO L124 PetriNetUnfolderBase]: 1908/2939 cut-off events. [2024-06-21 19:05:36,897 INFO L125 PetriNetUnfolderBase]: For 25856/25864 co-relation queries the response was YES. [2024-06-21 19:05:36,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13640 conditions, 2939 events. 1908/2939 cut-off events. For 25856/25864 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 14534 event pairs, 482 based on Foata normal form. 11/2932 useless extension candidates. Maximal degree in co-relation 13595. Up to 2351 conditions per place. [2024-06-21 19:05:36,912 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 85 selfloop transitions, 71 changer transitions 0/161 dead transitions. [2024-06-21 19:05:36,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 161 transitions, 1913 flow [2024-06-21 19:05:36,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:05:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:05:36,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-21 19:05:36,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2024-06-21 19:05:36,914 INFO L175 Difference]: Start difference. First operand has 89 places, 108 transitions, 1183 flow. Second operand 7 states and 152 transitions. [2024-06-21 19:05:36,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 161 transitions, 1913 flow [2024-06-21 19:05:36,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 161 transitions, 1697 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 19:05:36,943 INFO L231 Difference]: Finished difference. Result has 92 places, 123 transitions, 1334 flow [2024-06-21 19:05:36,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1334, PETRI_PLACES=92, PETRI_TRANSITIONS=123} [2024-06-21 19:05:36,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-21 19:05:36,944 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 123 transitions, 1334 flow [2024-06-21 19:05:36,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:36,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:36,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:36,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 19:05:36,944 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 19:05:36,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:36,945 INFO L85 PathProgramCache]: Analyzing trace with hash -488946638, now seen corresponding path program 1 times [2024-06-21 19:05:36,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:36,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535239900] [2024-06-21 19:05:36,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:36,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:38,677 INFO 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 19:05:38,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:38,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535239900] [2024-06-21 19:05:38,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535239900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:38,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:38,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:05:38,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510483418] [2024-06-21 19:05:38,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:38,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:05:38,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:38,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:05:38,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:05:38,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:38,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 123 transitions, 1334 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:38,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:38,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:38,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:39,420 INFO L124 PetriNetUnfolderBase]: 1900/2947 cut-off events. [2024-06-21 19:05:39,420 INFO L125 PetriNetUnfolderBase]: For 27942/27944 co-relation queries the response was YES. [2024-06-21 19:05:39,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13679 conditions, 2947 events. 1900/2947 cut-off events. For 27942/27944 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 14681 event pairs, 589 based on Foata normal form. 4/2932 useless extension candidates. Maximal degree in co-relation 13633. Up to 2764 conditions per place. [2024-06-21 19:05:39,435 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 125 selfloop transitions, 15 changer transitions 0/145 dead transitions. [2024-06-21 19:05:39,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 145 transitions, 1702 flow [2024-06-21 19:05:39,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:05:39,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:05:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 19:05:39,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 19:05:39,436 INFO L175 Difference]: Start difference. First operand has 92 places, 123 transitions, 1334 flow. Second operand 8 states and 134 transitions. [2024-06-21 19:05:39,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 145 transitions, 1702 flow [2024-06-21 19:05:39,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 145 transitions, 1609 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 19:05:39,467 INFO L231 Difference]: Finished difference. Result has 97 places, 125 transitions, 1312 flow [2024-06-21 19:05:39,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1312, PETRI_PLACES=97, PETRI_TRANSITIONS=125} [2024-06-21 19:05:39,468 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-21 19:05:39,468 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 125 transitions, 1312 flow [2024-06-21 19:05:39,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:39,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:39,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:39,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 19:05:39,469 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:39,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:39,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1978491202, now seen corresponding path program 1 times [2024-06-21 19:05:39,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:39,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843275444] [2024-06-21 19:05:39,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:39,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:40,252 INFO 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 19:05:40,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:40,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843275444] [2024-06-21 19:05:40,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843275444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:40,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:40,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:05:40,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881328667] [2024-06-21 19:05:40,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:40,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:05:40,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:40,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:05:40,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:05:40,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:05:40,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 125 transitions, 1312 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 19:05:40,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:40,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:05:40,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:40,658 INFO L124 PetriNetUnfolderBase]: 1690/2720 cut-off events. [2024-06-21 19:05:40,658 INFO L125 PetriNetUnfolderBase]: For 26846/26848 co-relation queries the response was YES. [2024-06-21 19:05:40,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12492 conditions, 2720 events. 1690/2720 cut-off events. For 26846/26848 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 13981 event pairs, 548 based on Foata normal form. 1/2702 useless extension candidates. Maximal degree in co-relation 12444. Up to 2505 conditions per place. [2024-06-21 19:05:40,674 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 119 selfloop transitions, 10 changer transitions 0/135 dead transitions. [2024-06-21 19:05:40,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 135 transitions, 1612 flow [2024-06-21 19:05:40,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:05:40,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:05:40,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-21 19:05:40,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-21 19:05:40,676 INFO L175 Difference]: Start difference. First operand has 97 places, 125 transitions, 1312 flow. Second operand 5 states and 92 transitions. [2024-06-21 19:05:40,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 135 transitions, 1612 flow [2024-06-21 19:05:40,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 135 transitions, 1565 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 19:05:40,703 INFO L231 Difference]: Finished difference. Result has 96 places, 128 transitions, 1319 flow [2024-06-21 19:05:40,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1319, PETRI_PLACES=96, PETRI_TRANSITIONS=128} [2024-06-21 19:05:40,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-21 19:05:40,705 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 128 transitions, 1319 flow [2024-06-21 19:05:40,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states 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 19:05:40,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:40,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:40,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 19:05:40,705 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 19:05:40,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:40,706 INFO L85 PathProgramCache]: Analyzing trace with hash -560115186, now seen corresponding path program 1 times [2024-06-21 19:05:40,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:40,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149531221] [2024-06-21 19:05:40,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:40,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:41,903 INFO 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 19:05:41,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:41,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149531221] [2024-06-21 19:05:41,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149531221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:41,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:41,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:05:41,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371633148] [2024-06-21 19:05:41,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:41,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:05:41,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:41,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:05:41,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:05:41,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:41,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 128 transitions, 1319 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 19:05:41,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:41,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:41,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:42,628 INFO L124 PetriNetUnfolderBase]: 1985/3089 cut-off events. [2024-06-21 19:05:42,629 INFO L125 PetriNetUnfolderBase]: For 35748/35753 co-relation queries the response was YES. [2024-06-21 19:05:42,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14855 conditions, 3089 events. 1985/3089 cut-off events. For 35748/35753 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 15485 event pairs, 505 based on Foata normal form. 8/3087 useless extension candidates. Maximal degree in co-relation 14807. Up to 2412 conditions per place. [2024-06-21 19:05:42,646 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 83 selfloop transitions, 82 changer transitions 0/170 dead transitions. [2024-06-21 19:05:42,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 170 transitions, 2061 flow [2024-06-21 19:05:42,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:05:42,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:05:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-21 19:05:42,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931972789115646 [2024-06-21 19:05:42,648 INFO L175 Difference]: Start difference. First operand has 96 places, 128 transitions, 1319 flow. Second operand 7 states and 145 transitions. [2024-06-21 19:05:42,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 170 transitions, 2061 flow [2024-06-21 19:05:42,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 170 transitions, 2029 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 19:05:42,683 INFO L231 Difference]: Finished difference. Result has 100 places, 140 transitions, 1612 flow [2024-06-21 19:05:42,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1287, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1612, PETRI_PLACES=100, PETRI_TRANSITIONS=140} [2024-06-21 19:05:42,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-21 19:05:42,684 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 140 transitions, 1612 flow [2024-06-21 19:05:42,684 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 19:05:42,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:42,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:42,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 19:05:42,684 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 19:05:42,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:42,685 INFO L85 PathProgramCache]: Analyzing trace with hash -560120766, now seen corresponding path program 2 times [2024-06-21 19:05:42,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:42,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923844585] [2024-06-21 19:05:42,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:42,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:43,826 INFO 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 19:05:43,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:43,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923844585] [2024-06-21 19:05:43,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923844585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:43,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:43,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:05:43,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008068895] [2024-06-21 19:05:43,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:43,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:05:43,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:43,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:05:43,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:05:43,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:43,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 140 transitions, 1612 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 19:05:43,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:43,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:43,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:44,609 INFO L124 PetriNetUnfolderBase]: 1969/3075 cut-off events. [2024-06-21 19:05:44,610 INFO L125 PetriNetUnfolderBase]: For 40405/40412 co-relation queries the response was YES. [2024-06-21 19:05:44,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15344 conditions, 3075 events. 1969/3075 cut-off events. For 40405/40412 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 15523 event pairs, 510 based on Foata normal form. 10/3075 useless extension candidates. Maximal degree in co-relation 15294. Up to 2399 conditions per place. [2024-06-21 19:05:44,627 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 81 selfloop transitions, 84 changer transitions 0/170 dead transitions. [2024-06-21 19:05:44,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 170 transitions, 2167 flow [2024-06-21 19:05:44,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:05:44,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:05:44,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-21 19:05:44,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931972789115646 [2024-06-21 19:05:44,629 INFO L175 Difference]: Start difference. First operand has 100 places, 140 transitions, 1612 flow. Second operand 7 states and 145 transitions. [2024-06-21 19:05:44,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 170 transitions, 2167 flow [2024-06-21 19:05:44,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 170 transitions, 2025 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 19:05:44,702 INFO L231 Difference]: Finished difference. Result has 105 places, 141 transitions, 1700 flow [2024-06-21 19:05:44,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1470, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1700, PETRI_PLACES=105, PETRI_TRANSITIONS=141} [2024-06-21 19:05:44,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-21 19:05:44,703 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 141 transitions, 1700 flow [2024-06-21 19:05:44,703 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 19:05:44,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:44,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:44,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 19:05:44,703 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 19:05:44,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:44,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2002813386, now seen corresponding path program 3 times [2024-06-21 19:05:44,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:44,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865350681] [2024-06-21 19:05:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:44,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:45,870 INFO 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 19:05:45,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:45,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865350681] [2024-06-21 19:05:45,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865350681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:45,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:45,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:05:45,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028399803] [2024-06-21 19:05:45,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:45,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:05:45,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:45,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:05:45,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:05:45,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:45,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 141 transitions, 1700 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 19:05:45,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:45,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:45,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:46,653 INFO L124 PetriNetUnfolderBase]: 1953/3051 cut-off events. [2024-06-21 19:05:46,654 INFO L125 PetriNetUnfolderBase]: For 44359/44364 co-relation queries the response was YES. [2024-06-21 19:05:46,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15587 conditions, 3051 events. 1953/3051 cut-off events. For 44359/44364 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 15369 event pairs, 492 based on Foata normal form. 10/3043 useless extension candidates. Maximal degree in co-relation 15533. Up to 2386 conditions per place. [2024-06-21 19:05:46,673 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 79 selfloop transitions, 81 changer transitions 0/165 dead transitions. [2024-06-21 19:05:46,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 165 transitions, 2164 flow [2024-06-21 19:05:46,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:05:46,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:05:46,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 19:05:46,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-21 19:05:46,679 INFO L175 Difference]: Start difference. First operand has 105 places, 141 transitions, 1700 flow. Second operand 7 states and 136 transitions. [2024-06-21 19:05:46,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 165 transitions, 2164 flow [2024-06-21 19:05:46,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 165 transitions, 2042 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 19:05:46,718 INFO L231 Difference]: Finished difference. Result has 109 places, 141 transitions, 1753 flow [2024-06-21 19:05:46,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1753, PETRI_PLACES=109, PETRI_TRANSITIONS=141} [2024-06-21 19:05:46,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-21 19:05:46,718 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 141 transitions, 1753 flow [2024-06-21 19:05:46,718 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 19:05:46,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:46,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:46,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 19:05:46,719 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 19:05:46,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:46,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1649567928, now seen corresponding path program 4 times [2024-06-21 19:05:46,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:46,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093615621] [2024-06-21 19:05:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:46,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:47,619 INFO 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 19:05:47,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:47,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093615621] [2024-06-21 19:05:47,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093615621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:47,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:47,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:05:47,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626008042] [2024-06-21 19:05:47,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:47,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:05:47,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:47,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:05:47,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:05:47,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:47,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 141 transitions, 1753 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 19:05:47,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:47,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:47,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:48,426 INFO L124 PetriNetUnfolderBase]: 2045/3186 cut-off events. [2024-06-21 19:05:48,426 INFO L125 PetriNetUnfolderBase]: For 50755/50760 co-relation queries the response was YES. [2024-06-21 19:05:48,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16565 conditions, 3186 events. 2045/3186 cut-off events. For 50755/50760 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16133 event pairs, 464 based on Foata normal form. 6/3188 useless extension candidates. Maximal degree in co-relation 16508. Up to 2458 conditions per place. [2024-06-21 19:05:48,446 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 93 selfloop transitions, 97 changer transitions 0/195 dead transitions. [2024-06-21 19:05:48,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 195 transitions, 2594 flow [2024-06-21 19:05:48,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:05:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:05:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-21 19:05:48,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-21 19:05:48,448 INFO L175 Difference]: Start difference. First operand has 109 places, 141 transitions, 1753 flow. Second operand 7 states and 150 transitions. [2024-06-21 19:05:48,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 195 transitions, 2594 flow [2024-06-21 19:05:48,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 195 transitions, 2430 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 19:05:48,485 INFO L231 Difference]: Finished difference. Result has 112 places, 157 transitions, 2048 flow [2024-06-21 19:05:48,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2048, PETRI_PLACES=112, PETRI_TRANSITIONS=157} [2024-06-21 19:05:48,486 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-21 19:05:48,486 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 157 transitions, 2048 flow [2024-06-21 19:05:48,486 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 19:05:48,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:48,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:48,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 19:05:48,487 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 19:05:48,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:48,487 INFO L85 PathProgramCache]: Analyzing trace with hash -129428274, now seen corresponding path program 5 times [2024-06-21 19:05:48,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:48,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123351310] [2024-06-21 19:05:48,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:48,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:49,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:49,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123351310] [2024-06-21 19:05:49,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123351310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:49,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:49,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:05:49,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460083241] [2024-06-21 19:05:49,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:49,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:05:49,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:49,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:05:49,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:05:49,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:49,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 157 transitions, 2048 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 19:05:49,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:49,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:49,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:50,171 INFO L124 PetriNetUnfolderBase]: 2103/3295 cut-off events. [2024-06-21 19:05:50,171 INFO L125 PetriNetUnfolderBase]: For 57632/57639 co-relation queries the response was YES. [2024-06-21 19:05:50,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17463 conditions, 3295 events. 2103/3295 cut-off events. For 57632/57639 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 16899 event pairs, 498 based on Foata normal form. 8/3299 useless extension candidates. Maximal degree in co-relation 17405. Up to 2507 conditions per place. [2024-06-21 19:05:50,192 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 88 selfloop transitions, 117 changer transitions 0/210 dead transitions. [2024-06-21 19:05:50,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 210 transitions, 2884 flow [2024-06-21 19:05:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:05:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:05:50,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-21 19:05:50,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-21 19:05:50,193 INFO L175 Difference]: Start difference. First operand has 112 places, 157 transitions, 2048 flow. Second operand 7 states and 150 transitions. [2024-06-21 19:05:50,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 210 transitions, 2884 flow [2024-06-21 19:05:50,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 210 transitions, 2732 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 19:05:50,252 INFO L231 Difference]: Finished difference. Result has 118 places, 180 transitions, 2596 flow [2024-06-21 19:05:50,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1909, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2596, PETRI_PLACES=118, PETRI_TRANSITIONS=180} [2024-06-21 19:05:50,253 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-21 19:05:50,253 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 180 transitions, 2596 flow [2024-06-21 19:05:50,253 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 19:05:50,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:50,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:50,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 19:05:50,253 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:50,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:50,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1203686752, now seen corresponding path program 1 times [2024-06-21 19:05:50,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:50,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389163205] [2024-06-21 19:05:50,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:50,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:51,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:51,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389163205] [2024-06-21 19:05:51,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389163205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:51,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:51,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:05:51,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637497080] [2024-06-21 19:05:51,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:51,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:05:51,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:51,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:05:51,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:05:51,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:51,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 180 transitions, 2596 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 19:05:51,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:51,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:51,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:51,611 INFO L124 PetriNetUnfolderBase]: 2100/3299 cut-off events. [2024-06-21 19:05:51,612 INFO L125 PetriNetUnfolderBase]: For 64083/64085 co-relation queries the response was YES. [2024-06-21 19:05:51,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18175 conditions, 3299 events. 2100/3299 cut-off events. For 64083/64085 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16925 event pairs, 679 based on Foata normal form. 1/3297 useless extension candidates. Maximal degree in co-relation 18114. Up to 3093 conditions per place. [2024-06-21 19:05:51,632 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 173 selfloop transitions, 13 changer transitions 0/191 dead transitions. [2024-06-21 19:05:51,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 191 transitions, 3016 flow [2024-06-21 19:05:51,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:05:51,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:05:51,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 19:05:51,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 19:05:51,633 INFO L175 Difference]: Start difference. First operand has 118 places, 180 transitions, 2596 flow. Second operand 6 states and 101 transitions. [2024-06-21 19:05:51,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 191 transitions, 3016 flow [2024-06-21 19:05:51,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 191 transitions, 2884 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 19:05:51,695 INFO L231 Difference]: Finished difference. Result has 121 places, 183 transitions, 2528 flow [2024-06-21 19:05:51,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2464, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2528, PETRI_PLACES=121, PETRI_TRANSITIONS=183} [2024-06-21 19:05:51,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-21 19:05:51,696 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 183 transitions, 2528 flow [2024-06-21 19:05:51,696 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 19:05:51,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:51,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:51,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 19:05:51,696 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 19:05:51,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:51,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1191352421, now seen corresponding path program 1 times [2024-06-21 19:05:51,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:51,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293671957] [2024-06-21 19:05:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:51,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:52,822 INFO 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 19:05:52,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:52,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293671957] [2024-06-21 19:05:52,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293671957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:52,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:52,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:05:52,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179859589] [2024-06-21 19:05:52,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:52,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:05:52,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:52,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:05:52,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:05:52,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:52,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 183 transitions, 2528 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 19:05:52,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:52,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:52,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:53,596 INFO L124 PetriNetUnfolderBase]: 2180/3396 cut-off events. [2024-06-21 19:05:53,596 INFO L125 PetriNetUnfolderBase]: For 76679/76684 co-relation queries the response was YES. [2024-06-21 19:05:53,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19254 conditions, 3396 events. 2180/3396 cut-off events. For 76679/76684 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17461 event pairs, 654 based on Foata normal form. 8/3393 useless extension candidates. Maximal degree in co-relation 19191. Up to 2992 conditions per place. [2024-06-21 19:05:53,617 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 145 selfloop transitions, 53 changer transitions 0/204 dead transitions. [2024-06-21 19:05:53,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 204 transitions, 3010 flow [2024-06-21 19:05:53,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:05:53,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:05:53,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 19:05:53,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 19:05:53,619 INFO L175 Difference]: Start difference. First operand has 121 places, 183 transitions, 2528 flow. Second operand 8 states and 142 transitions. [2024-06-21 19:05:53,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 204 transitions, 3010 flow [2024-06-21 19:05:53,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 204 transitions, 2968 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 19:05:53,694 INFO L231 Difference]: Finished difference. Result has 125 places, 185 transitions, 2627 flow [2024-06-21 19:05:53,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2627, PETRI_PLACES=125, PETRI_TRANSITIONS=185} [2024-06-21 19:05:53,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-21 19:05:53,695 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 185 transitions, 2627 flow [2024-06-21 19:05:53,695 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 19:05:53,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:53,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:53,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 19:05:53,695 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 19:05:53,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:53,695 INFO L85 PathProgramCache]: Analyzing trace with hash -302026623, now seen corresponding path program 2 times [2024-06-21 19:05:53,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:53,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483774361] [2024-06-21 19:05:53,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:53,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:54,824 INFO 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 19:05:54,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:54,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483774361] [2024-06-21 19:05:54,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483774361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:54,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:54,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:05:54,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635837805] [2024-06-21 19:05:54,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:54,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:05:54,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:54,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:05:54,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:05:54,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:54,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 185 transitions, 2627 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 19:05:54,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:54,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:54,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:55,628 INFO L124 PetriNetUnfolderBase]: 2232/3477 cut-off events. [2024-06-21 19:05:55,629 INFO L125 PetriNetUnfolderBase]: For 83063/83068 co-relation queries the response was YES. [2024-06-21 19:05:55,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20107 conditions, 3477 events. 2232/3477 cut-off events. For 83063/83068 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 17961 event pairs, 650 based on Foata normal form. 8/3474 useless extension candidates. Maximal degree in co-relation 20043. Up to 3001 conditions per place. [2024-06-21 19:05:55,655 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 155 selfloop transitions, 50 changer transitions 0/211 dead transitions. [2024-06-21 19:05:55,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 211 transitions, 3137 flow [2024-06-21 19:05:55,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:05:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:05:55,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 19:05:55,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 19:05:55,656 INFO L175 Difference]: Start difference. First operand has 125 places, 185 transitions, 2627 flow. Second operand 8 states and 143 transitions. [2024-06-21 19:05:55,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 211 transitions, 3137 flow [2024-06-21 19:05:55,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 211 transitions, 3016 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 19:05:55,741 INFO L231 Difference]: Finished difference. Result has 128 places, 190 transitions, 2672 flow [2024-06-21 19:05:55,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2506, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2672, PETRI_PLACES=128, PETRI_TRANSITIONS=190} [2024-06-21 19:05:55,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-21 19:05:55,742 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 190 transitions, 2672 flow [2024-06-21 19:05:55,742 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 19:05:55,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:55,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:55,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 19:05:55,742 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 19:05:55,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:55,743 INFO L85 PathProgramCache]: Analyzing trace with hash -183693795, now seen corresponding path program 1 times [2024-06-21 19:05:55,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:55,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700518378] [2024-06-21 19:05:55,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:55,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:57,434 INFO 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 19:05:57,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:57,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700518378] [2024-06-21 19:05:57,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700518378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:57,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:57,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:05:57,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348838960] [2024-06-21 19:05:57,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:57,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:05:57,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:57,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:05:57,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:05:57,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:57,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 190 transitions, 2672 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:57,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:57,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:57,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:58,412 INFO L124 PetriNetUnfolderBase]: 2324/3624 cut-off events. [2024-06-21 19:05:58,412 INFO L125 PetriNetUnfolderBase]: For 96672/96677 co-relation queries the response was YES. [2024-06-21 19:05:58,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21170 conditions, 3624 events. 2324/3624 cut-off events. For 96672/96677 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 19010 event pairs, 526 based on Foata normal form. 26/3639 useless extension candidates. Maximal degree in co-relation 21105. Up to 2656 conditions per place. [2024-06-21 19:05:58,436 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 100 selfloop transitions, 116 changer transitions 0/222 dead transitions. [2024-06-21 19:05:58,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 222 transitions, 3236 flow [2024-06-21 19:05:58,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:05:58,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:05:58,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 19:05:58,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 19:05:58,437 INFO L175 Difference]: Start difference. First operand has 128 places, 190 transitions, 2672 flow. Second operand 9 states and 168 transitions. [2024-06-21 19:05:58,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 222 transitions, 3236 flow [2024-06-21 19:05:58,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 222 transitions, 3128 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 19:05:58,528 INFO L231 Difference]: Finished difference. Result has 132 places, 192 transitions, 2842 flow [2024-06-21 19:05:58,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2564, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2842, PETRI_PLACES=132, PETRI_TRANSITIONS=192} [2024-06-21 19:05:58,529 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-21 19:05:58,529 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 192 transitions, 2842 flow [2024-06-21 19:05:58,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:58,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:58,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:58,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 19:05:58,529 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:58,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:58,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1685244029, now seen corresponding path program 1 times [2024-06-21 19:05:58,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:58,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665342248] [2024-06-21 19:05:58,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:58,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:59,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:59,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665342248] [2024-06-21 19:05:59,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665342248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:59,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:59,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:05:59,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138928352] [2024-06-21 19:05:59,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:59,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:05:59,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:59,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:05:59,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:05:59,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:05:59,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 192 transitions, 2842 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 19:05:59,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:59,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:05:59,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:59,984 INFO L124 PetriNetUnfolderBase]: 2367/3674 cut-off events. [2024-06-21 19:05:59,984 INFO L125 PetriNetUnfolderBase]: For 97413/97419 co-relation queries the response was YES. [2024-06-21 19:05:59,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22140 conditions, 3674 events. 2367/3674 cut-off events. For 97413/97419 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 19098 event pairs, 681 based on Foata normal form. 5/3674 useless extension candidates. Maximal degree in co-relation 22074. Up to 3444 conditions per place. [2024-06-21 19:06:00,011 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 182 selfloop transitions, 20 changer transitions 0/208 dead transitions. [2024-06-21 19:06:00,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 208 transitions, 3338 flow [2024-06-21 19:06:00,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:06:00,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:06:00,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 19:06:00,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 19:06:00,012 INFO L175 Difference]: Start difference. First operand has 132 places, 192 transitions, 2842 flow. Second operand 7 states and 116 transitions. [2024-06-21 19:06:00,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 208 transitions, 3338 flow [2024-06-21 19:06:00,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 208 transitions, 3048 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 19:06:00,118 INFO L231 Difference]: Finished difference. Result has 132 places, 196 transitions, 2659 flow [2024-06-21 19:06:00,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2554, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2659, PETRI_PLACES=132, PETRI_TRANSITIONS=196} [2024-06-21 19:06:00,119 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-21 19:06:00,119 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 196 transitions, 2659 flow [2024-06-21 19:06:00,119 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 19:06:00,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:00,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:00,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 19:06:00,120 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 19:06:00,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:00,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1882761493, now seen corresponding path program 2 times [2024-06-21 19:06:00,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:00,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327910534] [2024-06-21 19:06:00,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:00,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:01,912 INFO 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 19:06:01,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:01,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327910534] [2024-06-21 19:06:01,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327910534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:01,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:01,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:06:01,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484709587] [2024-06-21 19:06:01,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:01,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:06:01,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:01,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:06:01,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:06:02,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:02,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 196 transitions, 2659 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:02,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:02,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:02,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:02,930 INFO L124 PetriNetUnfolderBase]: 2384/3676 cut-off events. [2024-06-21 19:06:02,930 INFO L125 PetriNetUnfolderBase]: For 101652/101652 co-relation queries the response was YES. [2024-06-21 19:06:02,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22106 conditions, 3676 events. 2384/3676 cut-off events. For 101652/101652 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18954 event pairs, 573 based on Foata normal form. 4/3641 useless extension candidates. Maximal degree in co-relation 22039. Up to 2881 conditions per place. [2024-06-21 19:06:02,954 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 88 selfloop transitions, 132 changer transitions 0/226 dead transitions. [2024-06-21 19:06:02,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 226 transitions, 3235 flow [2024-06-21 19:06:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:06:02,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:06:02,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 19:06:02,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:06:02,955 INFO L175 Difference]: Start difference. First operand has 132 places, 196 transitions, 2659 flow. Second operand 9 states and 162 transitions. [2024-06-21 19:06:02,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 226 transitions, 3235 flow [2024-06-21 19:06:03,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 226 transitions, 3135 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 19:06:03,047 INFO L231 Difference]: Finished difference. Result has 138 places, 198 transitions, 2869 flow [2024-06-21 19:06:03,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2559, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2869, PETRI_PLACES=138, PETRI_TRANSITIONS=198} [2024-06-21 19:06:03,047 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-21 19:06:03,047 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 198 transitions, 2869 flow [2024-06-21 19:06:03,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:03,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:03,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:03,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 19:06:03,048 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 19:06:03,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:03,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1874726293, now seen corresponding path program 3 times [2024-06-21 19:06:03,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:03,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381758758] [2024-06-21 19:06:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:03,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:04,672 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 19:06:04,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:04,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381758758] [2024-06-21 19:06:04,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381758758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:04,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:04,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:06:04,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126770350] [2024-06-21 19:06:04,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:04,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:06:04,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:04,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:06:04,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:06:04,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:04,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 198 transitions, 2869 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 19:06:04,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:04,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:04,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:05,563 INFO L124 PetriNetUnfolderBase]: 2512/3885 cut-off events. [2024-06-21 19:06:05,563 INFO L125 PetriNetUnfolderBase]: For 119868/119868 co-relation queries the response was YES. [2024-06-21 19:06:05,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24306 conditions, 3885 events. 2512/3885 cut-off events. For 119868/119868 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20415 event pairs, 469 based on Foata normal form. 4/3852 useless extension candidates. Maximal degree in co-relation 24238. Up to 2673 conditions per place. [2024-06-21 19:06:05,589 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 91 selfloop transitions, 139 changer transitions 0/236 dead transitions. [2024-06-21 19:06:05,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 236 transitions, 3619 flow [2024-06-21 19:06:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:06:05,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:06:05,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 19:06:05,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 19:06:05,592 INFO L175 Difference]: Start difference. First operand has 138 places, 198 transitions, 2869 flow. Second operand 9 states and 168 transitions. [2024-06-21 19:06:05,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 236 transitions, 3619 flow [2024-06-21 19:06:05,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 236 transitions, 3329 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 19:06:05,695 INFO L231 Difference]: Finished difference. Result has 140 places, 202 transitions, 2944 flow [2024-06-21 19:06:05,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2579, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2944, PETRI_PLACES=140, PETRI_TRANSITIONS=202} [2024-06-21 19:06:05,695 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-21 19:06:05,695 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 202 transitions, 2944 flow [2024-06-21 19:06:05,695 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 19:06:05,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:05,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:05,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 19:06:05,696 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 19:06:05,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:05,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1646586133, now seen corresponding path program 4 times [2024-06-21 19:06:05,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:05,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873228035] [2024-06-21 19:06:05,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:05,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:07,409 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 19:06:07,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:07,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873228035] [2024-06-21 19:06:07,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873228035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:07,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:07,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:06:07,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141072696] [2024-06-21 19:06:07,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:07,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:06:07,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:07,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:06:07,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:06:07,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:07,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 202 transitions, 2944 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:07,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:07,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:07,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:08,430 INFO L124 PetriNetUnfolderBase]: 2529/3912 cut-off events. [2024-06-21 19:06:08,430 INFO L125 PetriNetUnfolderBase]: For 128277/128277 co-relation queries the response was YES. [2024-06-21 19:06:08,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24925 conditions, 3912 events. 2529/3912 cut-off events. For 128277/128277 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 20574 event pairs, 615 based on Foata normal form. 4/3879 useless extension candidates. Maximal degree in co-relation 24856. Up to 3113 conditions per place. [2024-06-21 19:06:08,458 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 100 selfloop transitions, 128 changer transitions 0/234 dead transitions. [2024-06-21 19:06:08,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 234 transitions, 3564 flow [2024-06-21 19:06:08,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:06:08,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:06:08,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 19:06:08,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 19:06:08,459 INFO L175 Difference]: Start difference. First operand has 140 places, 202 transitions, 2944 flow. Second operand 9 states and 163 transitions. [2024-06-21 19:06:08,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 234 transitions, 3564 flow [2024-06-21 19:06:08,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 234 transitions, 3266 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 19:06:08,575 INFO L231 Difference]: Finished difference. Result has 143 places, 204 transitions, 2957 flow [2024-06-21 19:06:08,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2648, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2957, PETRI_PLACES=143, PETRI_TRANSITIONS=204} [2024-06-21 19:06:08,575 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-21 19:06:08,575 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 204 transitions, 2957 flow [2024-06-21 19:06:08,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:08,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:08,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:08,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 19:06:08,576 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:08,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:08,576 INFO L85 PathProgramCache]: Analyzing trace with hash -536965305, now seen corresponding path program 2 times [2024-06-21 19:06:08,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:08,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172473380] [2024-06-21 19:06:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:08,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:09,401 INFO 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 19:06:09,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:09,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172473380] [2024-06-21 19:06:09,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172473380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:09,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:09,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:06:09,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906522964] [2024-06-21 19:06:09,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:09,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:06:09,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:09,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:06:09,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:06:09,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:09,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 204 transitions, 2957 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 19:06:09,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:09,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:09,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:09,983 INFO L124 PetriNetUnfolderBase]: 2534/3945 cut-off events. [2024-06-21 19:06:09,983 INFO L125 PetriNetUnfolderBase]: For 132734/132743 co-relation queries the response was YES. [2024-06-21 19:06:09,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25066 conditions, 3945 events. 2534/3945 cut-off events. For 132734/132743 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 20921 event pairs, 722 based on Foata normal form. 7/3944 useless extension candidates. Maximal degree in co-relation 24996. Up to 3703 conditions per place. [2024-06-21 19:06:10,016 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 186 selfloop transitions, 28 changer transitions 0/220 dead transitions. [2024-06-21 19:06:10,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 220 transitions, 3549 flow [2024-06-21 19:06:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:06:10,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:06:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 19:06:10,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 19:06:10,017 INFO L175 Difference]: Start difference. First operand has 143 places, 204 transitions, 2957 flow. Second operand 6 states and 105 transitions. [2024-06-21 19:06:10,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 220 transitions, 3549 flow [2024-06-21 19:06:10,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 220 transitions, 3165 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-21 19:06:10,162 INFO L231 Difference]: Finished difference. Result has 140 places, 210 transitions, 2713 flow [2024-06-21 19:06:10,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2573, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2713, PETRI_PLACES=140, PETRI_TRANSITIONS=210} [2024-06-21 19:06:10,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-21 19:06:10,162 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 210 transitions, 2713 flow [2024-06-21 19:06:10,163 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 19:06:10,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:10,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:10,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 19:06:10,163 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 19:06:10,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:10,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1846556167, now seen corresponding path program 3 times [2024-06-21 19:06:10,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:10,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201495296] [2024-06-21 19:06:10,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:10,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:11,088 INFO 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 19:06:11,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:11,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201495296] [2024-06-21 19:06:11,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201495296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:11,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:11,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:06:11,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851614437] [2024-06-21 19:06:11,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:11,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:06:11,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:11,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:06:11,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:06:11,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:11,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 210 transitions, 2713 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 19:06:11,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:11,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:11,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:11,970 INFO L124 PetriNetUnfolderBase]: 2562/3981 cut-off events. [2024-06-21 19:06:11,970 INFO L125 PetriNetUnfolderBase]: For 135554/135557 co-relation queries the response was YES. [2024-06-21 19:06:11,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25035 conditions, 3981 events. 2562/3981 cut-off events. For 135554/135557 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21153 event pairs, 717 based on Foata normal form. 6/3983 useless extension candidates. Maximal degree in co-relation 24965. Up to 3582 conditions per place. [2024-06-21 19:06:11,996 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 176 selfloop transitions, 57 changer transitions 0/239 dead transitions. [2024-06-21 19:06:11,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 239 transitions, 3301 flow [2024-06-21 19:06:11,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:06:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:06:11,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 19:06:11,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 19:06:11,997 INFO L175 Difference]: Start difference. First operand has 140 places, 210 transitions, 2713 flow. Second operand 8 states and 149 transitions. [2024-06-21 19:06:11,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 239 transitions, 3301 flow [2024-06-21 19:06:12,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 239 transitions, 3250 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 19:06:12,159 INFO L231 Difference]: Finished difference. Result has 146 places, 214 transitions, 2842 flow [2024-06-21 19:06:12,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2662, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2842, PETRI_PLACES=146, PETRI_TRANSITIONS=214} [2024-06-21 19:06:12,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-21 19:06:12,160 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 214 transitions, 2842 flow [2024-06-21 19:06:12,160 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 19:06:12,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:12,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:12,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 19:06:12,161 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 19:06:12,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:12,161 INFO L85 PathProgramCache]: Analyzing trace with hash -784323227, now seen corresponding path program 4 times [2024-06-21 19:06:12,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:12,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638447971] [2024-06-21 19:06:12,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:12,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:13,048 INFO 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 19:06:13,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:13,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638447971] [2024-06-21 19:06:13,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638447971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:13,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:13,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:06:13,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927266381] [2024-06-21 19:06:13,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:13,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:06:13,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:13,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:06:13,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:06:13,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:13,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 214 transitions, 2842 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 19:06:13,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:13,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:13,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:13,854 INFO L124 PetriNetUnfolderBase]: 2641/4116 cut-off events. [2024-06-21 19:06:13,855 INFO L125 PetriNetUnfolderBase]: For 145504/145507 co-relation queries the response was YES. [2024-06-21 19:06:13,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26193 conditions, 4116 events. 2641/4116 cut-off events. For 145504/145507 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 22162 event pairs, 743 based on Foata normal form. 6/4118 useless extension candidates. Maximal degree in co-relation 26121. Up to 3589 conditions per place. [2024-06-21 19:06:13,887 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 185 selfloop transitions, 61 changer transitions 0/252 dead transitions. [2024-06-21 19:06:13,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 252 transitions, 3510 flow [2024-06-21 19:06:13,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:06:13,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:06:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 19:06:13,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 19:06:13,889 INFO L175 Difference]: Start difference. First operand has 146 places, 214 transitions, 2842 flow. Second operand 8 states and 150 transitions. [2024-06-21 19:06:13,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 252 transitions, 3510 flow [2024-06-21 19:06:14,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 252 transitions, 3390 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 19:06:14,054 INFO L231 Difference]: Finished difference. Result has 150 places, 225 transitions, 2991 flow [2024-06-21 19:06:14,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2722, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2991, PETRI_PLACES=150, PETRI_TRANSITIONS=225} [2024-06-21 19:06:14,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-21 19:06:14,055 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 225 transitions, 2991 flow [2024-06-21 19:06:14,055 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 19:06:14,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:14,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:14,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 19:06:14,055 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:14,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:14,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2102187655, now seen corresponding path program 5 times [2024-06-21 19:06:14,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:14,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341887774] [2024-06-21 19:06:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:14,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:14,703 INFO 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 19:06:14,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:14,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341887774] [2024-06-21 19:06:14,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341887774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:14,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:14,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:06:14,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946326754] [2024-06-21 19:06:14,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:14,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:06:14,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:14,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:06:14,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:06:14,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 19:06:14,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 225 transitions, 2991 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 19:06:14,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:14,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 19:06:14,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:15,479 INFO L124 PetriNetUnfolderBase]: 2135/3613 cut-off events. [2024-06-21 19:06:15,479 INFO L125 PetriNetUnfolderBase]: For 134325/134393 co-relation queries the response was YES. [2024-06-21 19:06:15,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23092 conditions, 3613 events. 2135/3613 cut-off events. For 134325/134393 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21305 event pairs, 472 based on Foata normal form. 62/3632 useless extension candidates. Maximal degree in co-relation 23018. Up to 2595 conditions per place. [2024-06-21 19:06:15,510 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 117 selfloop transitions, 80 changer transitions 0/258 dead transitions. [2024-06-21 19:06:15,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 258 transitions, 3563 flow [2024-06-21 19:06:15,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:06:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:06:15,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-21 19:06:15,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-06-21 19:06:15,511 INFO L175 Difference]: Start difference. First operand has 150 places, 225 transitions, 2991 flow. Second operand 7 states and 148 transitions. [2024-06-21 19:06:15,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 258 transitions, 3563 flow [2024-06-21 19:06:15,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 258 transitions, 3418 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 19:06:15,710 INFO L231 Difference]: Finished difference. Result has 153 places, 237 transitions, 3228 flow [2024-06-21 19:06:15,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2846, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3228, PETRI_PLACES=153, PETRI_TRANSITIONS=237} [2024-06-21 19:06:15,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-21 19:06:15,711 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 237 transitions, 3228 flow [2024-06-21 19:06:15,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 19:06:15,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:15,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:15,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 19:06:15,711 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:15,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:15,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1045214733, now seen corresponding path program 5 times [2024-06-21 19:06:15,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:15,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808964188] [2024-06-21 19:06:15,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:15,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:17,202 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 19:06:17,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:17,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808964188] [2024-06-21 19:06:17,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808964188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:17,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:17,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:06:17,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421793241] [2024-06-21 19:06:17,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:17,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:06:17,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:17,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:06:17,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:06:17,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:17,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 237 transitions, 3228 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:17,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:17,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:17,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:18,274 INFO L124 PetriNetUnfolderBase]: 2704/4215 cut-off events. [2024-06-21 19:06:18,275 INFO L125 PetriNetUnfolderBase]: For 160615/160618 co-relation queries the response was YES. [2024-06-21 19:06:18,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27132 conditions, 4215 events. 2704/4215 cut-off events. For 160615/160618 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 22839 event pairs, 629 based on Foata normal form. 24/4235 useless extension candidates. Maximal degree in co-relation 27055. Up to 3198 conditions per place. [2024-06-21 19:06:18,308 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 152 selfloop transitions, 118 changer transitions 0/276 dead transitions. [2024-06-21 19:06:18,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 276 transitions, 3906 flow [2024-06-21 19:06:18,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:06:18,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:06:18,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 19:06:18,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-21 19:06:18,309 INFO L175 Difference]: Start difference. First operand has 153 places, 237 transitions, 3228 flow. Second operand 9 states and 177 transitions. [2024-06-21 19:06:18,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 276 transitions, 3906 flow [2024-06-21 19:06:18,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 276 transitions, 3786 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 19:06:18,539 INFO L231 Difference]: Finished difference. Result has 159 places, 239 transitions, 3378 flow [2024-06-21 19:06:18,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3108, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3378, PETRI_PLACES=159, PETRI_TRANSITIONS=239} [2024-06-21 19:06:18,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-21 19:06:18,540 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 239 transitions, 3378 flow [2024-06-21 19:06:18,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:18,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:18,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:18,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 19:06:18,540 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 19:06:18,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:18,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1544657887, now seen corresponding path program 3 times [2024-06-21 19:06:18,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:18,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17770558] [2024-06-21 19:06:18,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:18,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:19,227 INFO 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 19:06:19,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:19,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17770558] [2024-06-21 19:06:19,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17770558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:19,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:19,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:06:19,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005674711] [2024-06-21 19:06:19,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:19,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:06:19,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:19,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:06:19,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:06:19,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:19,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 239 transitions, 3378 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 19:06:19,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:19,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:19,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:19,895 INFO L124 PetriNetUnfolderBase]: 2706/4235 cut-off events. [2024-06-21 19:06:19,895 INFO L125 PetriNetUnfolderBase]: For 158852/158856 co-relation queries the response was YES. [2024-06-21 19:06:19,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27533 conditions, 4235 events. 2706/4235 cut-off events. For 158852/158856 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23177 event pairs, 877 based on Foata normal form. 5/4237 useless extension candidates. Maximal degree in co-relation 27455. Up to 3985 conditions per place. [2024-06-21 19:06:19,932 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 231 selfloop transitions, 23 changer transitions 0/260 dead transitions. [2024-06-21 19:06:19,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 260 transitions, 3976 flow [2024-06-21 19:06:19,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:06:19,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:06:19,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 19:06:19,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 19:06:19,933 INFO L175 Difference]: Start difference. First operand has 159 places, 239 transitions, 3378 flow. Second operand 6 states and 114 transitions. [2024-06-21 19:06:19,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 260 transitions, 3976 flow [2024-06-21 19:06:20,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 260 transitions, 3674 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 19:06:20,116 INFO L231 Difference]: Finished difference. Result has 158 places, 243 transitions, 3184 flow [2024-06-21 19:06:20,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3078, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3184, PETRI_PLACES=158, PETRI_TRANSITIONS=243} [2024-06-21 19:06:20,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-21 19:06:20,116 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 243 transitions, 3184 flow [2024-06-21 19:06:20,117 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 19:06:20,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:20,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:20,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 19:06:20,117 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 19:06:20,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:20,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1340630013, now seen corresponding path program 1 times [2024-06-21 19:06:20,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:20,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477467220] [2024-06-21 19:06:20,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:20,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:20,888 INFO 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 19:06:20,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:20,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477467220] [2024-06-21 19:06:20,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477467220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:20,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:20,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:06:20,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343401526] [2024-06-21 19:06:20,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:20,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:06:20,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:20,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:06:20,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:06:20,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:06:20,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 243 transitions, 3184 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:20,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:20,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:06:20,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:21,587 INFO L124 PetriNetUnfolderBase]: 2504/3999 cut-off events. [2024-06-21 19:06:21,587 INFO L125 PetriNetUnfolderBase]: For 128402/128402 co-relation queries the response was YES. [2024-06-21 19:06:21,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24379 conditions, 3999 events. 2504/3999 cut-off events. For 128402/128402 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 22363 event pairs, 859 based on Foata normal form. 1/3997 useless extension candidates. Maximal degree in co-relation 24300. Up to 3711 conditions per place. [2024-06-21 19:06:21,620 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 237 selfloop transitions, 13 changer transitions 0/257 dead transitions. [2024-06-21 19:06:21,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 257 transitions, 3754 flow [2024-06-21 19:06:21,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:06:21,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:06:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 19:06:21,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-21 19:06:21,621 INFO L175 Difference]: Start difference. First operand has 158 places, 243 transitions, 3184 flow. Second operand 6 states and 109 transitions. [2024-06-21 19:06:21,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 257 transitions, 3754 flow [2024-06-21 19:06:21,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 257 transitions, 3696 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 19:06:21,851 INFO L231 Difference]: Finished difference. Result has 160 places, 246 transitions, 3198 flow [2024-06-21 19:06:21,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3126, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3198, PETRI_PLACES=160, PETRI_TRANSITIONS=246} [2024-06-21 19:06:21,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-21 19:06:21,851 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 246 transitions, 3198 flow [2024-06-21 19:06:21,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:21,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:21,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:21,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 19:06:21,852 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 19:06:21,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:21,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1340422623, now seen corresponding path program 2 times [2024-06-21 19:06:21,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:21,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169707008] [2024-06-21 19:06:21,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:21,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:22,663 INFO 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 19:06:22,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:22,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169707008] [2024-06-21 19:06:22,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169707008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:22,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:22,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:06:22,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49541807] [2024-06-21 19:06:22,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:22,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:06:22,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:22,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:06:22,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:06:22,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:06:22,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 246 transitions, 3198 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:22,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:22,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:06:22,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:23,364 INFO L124 PetriNetUnfolderBase]: 2501/3996 cut-off events. [2024-06-21 19:06:23,365 INFO L125 PetriNetUnfolderBase]: For 133907/133910 co-relation queries the response was YES. [2024-06-21 19:06:23,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24735 conditions, 3996 events. 2501/3996 cut-off events. For 133907/133910 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 22359 event pairs, 863 based on Foata normal form. 3/3995 useless extension candidates. Maximal degree in co-relation 24654. Up to 3701 conditions per place. [2024-06-21 19:06:23,395 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 232 selfloop transitions, 18 changer transitions 0/257 dead transitions. [2024-06-21 19:06:23,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 257 transitions, 3762 flow [2024-06-21 19:06:23,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:06:23,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:06:23,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 19:06:23,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:06:23,396 INFO L175 Difference]: Start difference. First operand has 160 places, 246 transitions, 3198 flow. Second operand 6 states and 108 transitions. [2024-06-21 19:06:23,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 257 transitions, 3762 flow [2024-06-21 19:06:23,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 257 transitions, 3712 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 19:06:23,586 INFO L231 Difference]: Finished difference. Result has 162 places, 249 transitions, 3236 flow [2024-06-21 19:06:23,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3148, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3236, PETRI_PLACES=162, PETRI_TRANSITIONS=249} [2024-06-21 19:06:23,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-21 19:06:23,586 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 249 transitions, 3236 flow [2024-06-21 19:06:23,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:23,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:23,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:23,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 19:06:23,587 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 19:06:23,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:23,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1340414687, now seen corresponding path program 1 times [2024-06-21 19:06:23,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:23,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830400215] [2024-06-21 19:06:23,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:23,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:24,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:24,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830400215] [2024-06-21 19:06:24,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830400215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:24,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:24,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:06:24,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392145741] [2024-06-21 19:06:24,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:24,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:06:24,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:24,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:06:24,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:06:24,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:24,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 249 transitions, 3236 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:24,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:24,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:24,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:25,196 INFO L124 PetriNetUnfolderBase]: 2604/4097 cut-off events. [2024-06-21 19:06:25,197 INFO L125 PetriNetUnfolderBase]: For 139254/139254 co-relation queries the response was YES. [2024-06-21 19:06:25,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25606 conditions, 4097 events. 2604/4097 cut-off events. For 139254/139254 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 22497 event pairs, 894 based on Foata normal form. 1/4095 useless extension candidates. Maximal degree in co-relation 25524. Up to 3901 conditions per place. [2024-06-21 19:06:25,228 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 16 changer transitions 0/261 dead transitions. [2024-06-21 19:06:25,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 261 transitions, 3812 flow [2024-06-21 19:06:25,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:06:25,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:06:25,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 19:06:25,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-21 19:06:25,229 INFO L175 Difference]: Start difference. First operand has 162 places, 249 transitions, 3236 flow. Second operand 7 states and 114 transitions. [2024-06-21 19:06:25,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 261 transitions, 3812 flow [2024-06-21 19:06:25,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 261 transitions, 3746 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 19:06:25,366 INFO L231 Difference]: Finished difference. Result has 165 places, 252 transitions, 3252 flow [2024-06-21 19:06:25,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3170, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3252, PETRI_PLACES=165, PETRI_TRANSITIONS=252} [2024-06-21 19:06:25,367 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-21 19:06:25,367 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 252 transitions, 3252 flow [2024-06-21 19:06:25,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:25,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:25,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:25,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 19:06:25,368 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:25,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:25,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1809473421, now seen corresponding path program 1 times [2024-06-21 19:06:25,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:25,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283386504] [2024-06-21 19:06:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:25,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:26,683 INFO 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 19:06:26,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:26,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283386504] [2024-06-21 19:06:26,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283386504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:26,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:26,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:06:26,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710464470] [2024-06-21 19:06:26,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:26,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:06:26,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:26,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:06:26,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:06:26,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:26,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 252 transitions, 3252 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 19:06:26,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:26,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:26,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:27,718 INFO L124 PetriNetUnfolderBase]: 2760/4318 cut-off events. [2024-06-21 19:06:27,719 INFO L125 PetriNetUnfolderBase]: For 176299/176302 co-relation queries the response was YES. [2024-06-21 19:06:27,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28094 conditions, 4318 events. 2760/4318 cut-off events. For 176299/176302 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23663 event pairs, 597 based on Foata normal form. 16/4323 useless extension candidates. Maximal degree in co-relation 28011. Up to 3115 conditions per place. [2024-06-21 19:06:27,752 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 158 selfloop transitions, 125 changer transitions 0/289 dead transitions. [2024-06-21 19:06:27,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 289 transitions, 3986 flow [2024-06-21 19:06:27,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:06:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:06:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 19:06:27,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 19:06:27,754 INFO L175 Difference]: Start difference. First operand has 165 places, 252 transitions, 3252 flow. Second operand 9 states and 171 transitions. [2024-06-21 19:06:27,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 289 transitions, 3986 flow [2024-06-21 19:06:27,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 289 transitions, 3926 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 19:06:27,963 INFO L231 Difference]: Finished difference. Result has 169 places, 253 transitions, 3481 flow [2024-06-21 19:06:27,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3192, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3481, PETRI_PLACES=169, PETRI_TRANSITIONS=253} [2024-06-21 19:06:27,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-21 19:06:27,964 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 253 transitions, 3481 flow [2024-06-21 19:06:27,964 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 19:06:27,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:27,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:27,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 19:06:27,964 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:27,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:27,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1720907661, now seen corresponding path program 2 times [2024-06-21 19:06:27,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:27,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758671097] [2024-06-21 19:06:27,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:27,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:29,226 INFO 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 19:06:29,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:29,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758671097] [2024-06-21 19:06:29,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758671097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:29,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:29,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:06:29,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243269545] [2024-06-21 19:06:29,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:29,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:06:29,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:29,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:06:29,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:06:29,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:29,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 253 transitions, 3481 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 19:06:29,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:29,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:29,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:30,175 INFO L124 PetriNetUnfolderBase]: 2929/4612 cut-off events. [2024-06-21 19:06:30,175 INFO L125 PetriNetUnfolderBase]: For 201699/201702 co-relation queries the response was YES. [2024-06-21 19:06:30,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30945 conditions, 4612 events. 2929/4612 cut-off events. For 201699/201702 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 25908 event pairs, 680 based on Foata normal form. 16/4617 useless extension candidates. Maximal degree in co-relation 30861. Up to 2777 conditions per place. [2024-06-21 19:06:30,285 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 161 selfloop transitions, 125 changer transitions 0/292 dead transitions. [2024-06-21 19:06:30,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 292 transitions, 4361 flow [2024-06-21 19:06:30,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:06:30,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:06:30,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 19:06:30,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 19:06:30,286 INFO L175 Difference]: Start difference. First operand has 169 places, 253 transitions, 3481 flow. Second operand 9 states and 172 transitions. [2024-06-21 19:06:30,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 292 transitions, 4361 flow [2024-06-21 19:06:30,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 292 transitions, 4094 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 19:06:30,505 INFO L231 Difference]: Finished difference. Result has 171 places, 255 transitions, 3535 flow [2024-06-21 19:06:30,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3214, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3535, PETRI_PLACES=171, PETRI_TRANSITIONS=255} [2024-06-21 19:06:30,506 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-21 19:06:30,506 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 255 transitions, 3535 flow [2024-06-21 19:06:30,506 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 19:06:30,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:30,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:30,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 19:06:30,507 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:30,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:30,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1088532395, now seen corresponding path program 3 times [2024-06-21 19:06:30,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:30,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631400747] [2024-06-21 19:06:30,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:30,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:31,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:31,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631400747] [2024-06-21 19:06:31,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631400747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:31,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:31,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:06:31,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147781343] [2024-06-21 19:06:31,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:31,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:06:31,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:31,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:06:31,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:06:31,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:31,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 255 transitions, 3535 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 19:06:31,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:31,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:31,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:32,872 INFO L124 PetriNetUnfolderBase]: 3048/4825 cut-off events. [2024-06-21 19:06:32,873 INFO L125 PetriNetUnfolderBase]: For 219123/219126 co-relation queries the response was YES. [2024-06-21 19:06:32,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32554 conditions, 4825 events. 3048/4825 cut-off events. For 219123/219126 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 27550 event pairs, 738 based on Foata normal form. 16/4830 useless extension candidates. Maximal degree in co-relation 32469. Up to 3538 conditions per place. [2024-06-21 19:06:32,913 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 161 selfloop transitions, 130 changer transitions 0/297 dead transitions. [2024-06-21 19:06:32,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 297 transitions, 4465 flow [2024-06-21 19:06:32,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:06:32,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:06:32,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 19:06:32,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-21 19:06:32,915 INFO L175 Difference]: Start difference. First operand has 171 places, 255 transitions, 3535 flow. Second operand 9 states and 175 transitions. [2024-06-21 19:06:32,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 297 transitions, 4465 flow [2024-06-21 19:06:33,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 297 transitions, 4323 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 19:06:33,167 INFO L231 Difference]: Finished difference. Result has 175 places, 257 transitions, 3727 flow [2024-06-21 19:06:33,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3393, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3727, PETRI_PLACES=175, PETRI_TRANSITIONS=257} [2024-06-21 19:06:33,168 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-21 19:06:33,168 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 257 transitions, 3727 flow [2024-06-21 19:06:33,168 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 19:06:33,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:33,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:33,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 19:06:33,168 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:33,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:33,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1094042645, now seen corresponding path program 4 times [2024-06-21 19:06:33,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:33,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098942678] [2024-06-21 19:06:33,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:33,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:34,438 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 19:06:34,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:34,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098942678] [2024-06-21 19:06:34,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098942678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:34,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:34,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:06:34,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374390115] [2024-06-21 19:06:34,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:34,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:06:34,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:34,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:06:34,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:06:34,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:34,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 257 transitions, 3727 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 19:06:34,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:34,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:34,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:35,596 INFO L124 PetriNetUnfolderBase]: 3123/4948 cut-off events. [2024-06-21 19:06:35,596 INFO L125 PetriNetUnfolderBase]: For 233356/233359 co-relation queries the response was YES. [2024-06-21 19:06:35,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33968 conditions, 4948 events. 3123/4948 cut-off events. For 233356/233359 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 28399 event pairs, 769 based on Foata normal form. 20/4957 useless extension candidates. Maximal degree in co-relation 33881. Up to 3968 conditions per place. [2024-06-21 19:06:35,640 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 167 selfloop transitions, 116 changer transitions 0/289 dead transitions. [2024-06-21 19:06:35,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 289 transitions, 4435 flow [2024-06-21 19:06:35,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:06:35,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:06:35,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 19:06:35,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 19:06:35,642 INFO L175 Difference]: Start difference. First operand has 175 places, 257 transitions, 3727 flow. Second operand 9 states and 167 transitions. [2024-06-21 19:06:35,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 289 transitions, 4435 flow [2024-06-21 19:06:35,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 289 transitions, 4171 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 19:06:36,002 INFO L231 Difference]: Finished difference. Result has 178 places, 258 transitions, 3744 flow [2024-06-21 19:06:36,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3465, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3744, PETRI_PLACES=178, PETRI_TRANSITIONS=258} [2024-06-21 19:06:36,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-21 19:06:36,003 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 258 transitions, 3744 flow [2024-06-21 19:06:36,003 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 19:06:36,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:36,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:36,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 19:06:36,003 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:36,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:36,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1088680265, now seen corresponding path program 5 times [2024-06-21 19:06:36,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:36,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582171663] [2024-06-21 19:06:36,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:36,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:37,317 INFO 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 19:06:37,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:37,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582171663] [2024-06-21 19:06:37,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582171663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:37,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:37,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:06:37,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084909388] [2024-06-21 19:06:37,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:37,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:06:37,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:37,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:06:37,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:06:37,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:37,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 258 transitions, 3744 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 19:06:37,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:37,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:37,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:38,562 INFO L124 PetriNetUnfolderBase]: 3198/5075 cut-off events. [2024-06-21 19:06:38,562 INFO L125 PetriNetUnfolderBase]: For 241971/241974 co-relation queries the response was YES. [2024-06-21 19:06:38,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35092 conditions, 5075 events. 3198/5075 cut-off events. For 241971/241974 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 29452 event pairs, 793 based on Foata normal form. 20/5084 useless extension candidates. Maximal degree in co-relation 35003. Up to 4093 conditions per place. [2024-06-21 19:06:38,602 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 163 selfloop transitions, 123 changer transitions 0/292 dead transitions. [2024-06-21 19:06:38,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 292 transitions, 4480 flow [2024-06-21 19:06:38,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:06:38,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:06:38,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 19:06:38,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 19:06:38,603 INFO L175 Difference]: Start difference. First operand has 178 places, 258 transitions, 3744 flow. Second operand 9 states and 169 transitions. [2024-06-21 19:06:38,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 292 transitions, 4480 flow [2024-06-21 19:06:38,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 292 transitions, 4170 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 19:06:38,913 INFO L231 Difference]: Finished difference. Result has 179 places, 259 transitions, 3729 flow [2024-06-21 19:06:38,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3434, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3729, PETRI_PLACES=179, PETRI_TRANSITIONS=259} [2024-06-21 19:06:38,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-21 19:06:38,914 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 259 transitions, 3729 flow [2024-06-21 19:06:38,914 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 19:06:38,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:38,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:38,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 19:06:38,915 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:38,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:38,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1094257847, now seen corresponding path program 1 times [2024-06-21 19:06:38,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:38,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039185601] [2024-06-21 19:06:38,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:38,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:40,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:40,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039185601] [2024-06-21 19:06:40,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039185601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:40,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:40,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:06:40,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117378427] [2024-06-21 19:06:40,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:40,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:06:40,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:40,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:06:40,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:06:40,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:40,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 259 transitions, 3729 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:40,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:40,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:40,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:41,733 INFO L124 PetriNetUnfolderBase]: 3239/5152 cut-off events. [2024-06-21 19:06:41,734 INFO L125 PetriNetUnfolderBase]: For 247004/247007 co-relation queries the response was YES. [2024-06-21 19:06:41,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35588 conditions, 5152 events. 3239/5152 cut-off events. For 247004/247007 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 30125 event pairs, 745 based on Foata normal form. 12/5153 useless extension candidates. Maximal degree in co-relation 35499. Up to 3668 conditions per place. [2024-06-21 19:06:41,774 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 170 selfloop transitions, 117 changer transitions 0/293 dead transitions. [2024-06-21 19:06:41,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 293 transitions, 4449 flow [2024-06-21 19:06:41,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:06:41,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:06:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 19:06:41,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 19:06:41,775 INFO L175 Difference]: Start difference. First operand has 179 places, 259 transitions, 3729 flow. Second operand 9 states and 168 transitions. [2024-06-21 19:06:41,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 293 transitions, 4449 flow [2024-06-21 19:06:42,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 293 transitions, 4085 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 19:06:42,116 INFO L231 Difference]: Finished difference. Result has 179 places, 260 transitions, 3643 flow [2024-06-21 19:06:42,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3643, PETRI_PLACES=179, PETRI_TRANSITIONS=260} [2024-06-21 19:06:42,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-21 19:06:42,117 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 260 transitions, 3643 flow [2024-06-21 19:06:42,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:42,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:42,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:42,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 19:06:42,117 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 19:06:42,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:42,117 INFO L85 PathProgramCache]: Analyzing trace with hash 521971311, now seen corresponding path program 1 times [2024-06-21 19:06:42,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:42,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197821387] [2024-06-21 19:06:42,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:42,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:42,884 INFO 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 19:06:42,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:42,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197821387] [2024-06-21 19:06:42,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197821387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:42,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:42,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:06:42,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068618099] [2024-06-21 19:06:42,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:42,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:06:42,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:42,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:06:42,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:06:42,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:42,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 260 transitions, 3643 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:42,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:42,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:42,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:43,952 INFO L124 PetriNetUnfolderBase]: 3249/5172 cut-off events. [2024-06-21 19:06:43,952 INFO L125 PetriNetUnfolderBase]: For 246402/246405 co-relation queries the response was YES. [2024-06-21 19:06:43,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35690 conditions, 5172 events. 3249/5172 cut-off events. For 246402/246405 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 30327 event pairs, 944 based on Foata normal form. 4/5165 useless extension candidates. Maximal degree in co-relation 35601. Up to 4733 conditions per place. [2024-06-21 19:06:44,001 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 216 selfloop transitions, 58 changer transitions 0/280 dead transitions. [2024-06-21 19:06:44,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 280 transitions, 4309 flow [2024-06-21 19:06:44,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:06:44,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:06:44,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 19:06:44,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 19:06:44,002 INFO L175 Difference]: Start difference. First operand has 179 places, 260 transitions, 3643 flow. Second operand 8 states and 140 transitions. [2024-06-21 19:06:44,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 280 transitions, 4309 flow [2024-06-21 19:06:44,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 280 transitions, 4053 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 19:06:44,351 INFO L231 Difference]: Finished difference. Result has 180 places, 264 transitions, 3574 flow [2024-06-21 19:06:44,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3387, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3574, PETRI_PLACES=180, PETRI_TRANSITIONS=264} [2024-06-21 19:06:44,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-21 19:06:44,351 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 264 transitions, 3574 flow [2024-06-21 19:06:44,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:44,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:44,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:44,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 19:06:44,352 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 19:06:44,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:44,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1042125729, now seen corresponding path program 1 times [2024-06-21 19:06:44,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:44,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702226792] [2024-06-21 19:06:44,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:44,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:45,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:45,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702226792] [2024-06-21 19:06:45,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702226792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:45,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:45,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:06:45,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141211251] [2024-06-21 19:06:45,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:45,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:06:45,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:45,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:06:45,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:06:45,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:06:45,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 264 transitions, 3574 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:45,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:45,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:06:45,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:46,222 INFO L124 PetriNetUnfolderBase]: 3360/5283 cut-off events. [2024-06-21 19:06:46,222 INFO L125 PetriNetUnfolderBase]: For 251369/251375 co-relation queries the response was YES. [2024-06-21 19:06:46,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36415 conditions, 5283 events. 3360/5283 cut-off events. For 251369/251375 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 30514 event pairs, 1022 based on Foata normal form. 5/5283 useless extension candidates. Maximal degree in co-relation 36325. Up to 5090 conditions per place. [2024-06-21 19:06:46,271 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 26 changer transitions 0/279 dead transitions. [2024-06-21 19:06:46,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 279 transitions, 4202 flow [2024-06-21 19:06:46,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:06:46,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:06:46,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-21 19:06:46,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3630952380952381 [2024-06-21 19:06:46,272 INFO L175 Difference]: Start difference. First operand has 180 places, 264 transitions, 3574 flow. Second operand 8 states and 122 transitions. [2024-06-21 19:06:46,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 279 transitions, 4202 flow [2024-06-21 19:06:46,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 279 transitions, 4041 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 19:06:46,651 INFO L231 Difference]: Finished difference. Result has 182 places, 267 transitions, 3520 flow [2024-06-21 19:06:46,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3413, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3520, PETRI_PLACES=182, PETRI_TRANSITIONS=267} [2024-06-21 19:06:46,652 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-21 19:06:46,652 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 267 transitions, 3520 flow [2024-06-21 19:06:46,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:46,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:46,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:46,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 19:06:46,652 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 19:06:46,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:46,653 INFO L85 PathProgramCache]: Analyzing trace with hash 992977251, now seen corresponding path program 2 times [2024-06-21 19:06:46,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:46,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474459493] [2024-06-21 19:06:46,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:46,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:47,548 INFO 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 19:06:47,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:47,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474459493] [2024-06-21 19:06:47,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474459493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:47,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:47,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:06:47,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193643982] [2024-06-21 19:06:47,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:47,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:06:47,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:47,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:06:47,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:06:47,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:47,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 267 transitions, 3520 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:47,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:47,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:47,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:48,497 INFO L124 PetriNetUnfolderBase]: 3294/5235 cut-off events. [2024-06-21 19:06:48,497 INFO L125 PetriNetUnfolderBase]: For 264140/264143 co-relation queries the response was YES. [2024-06-21 19:06:48,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36711 conditions, 5235 events. 3294/5235 cut-off events. For 264140/264143 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 30689 event pairs, 943 based on Foata normal form. 4/5228 useless extension candidates. Maximal degree in co-relation 36620. Up to 4746 conditions per place. [2024-06-21 19:06:48,548 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 222 selfloop transitions, 59 changer transitions 0/288 dead transitions. [2024-06-21 19:06:48,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 288 transitions, 4328 flow [2024-06-21 19:06:48,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:06:48,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:06:48,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 19:06:48,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 19:06:48,549 INFO L175 Difference]: Start difference. First operand has 182 places, 267 transitions, 3520 flow. Second operand 8 states and 138 transitions. [2024-06-21 19:06:48,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 288 transitions, 4328 flow [2024-06-21 19:06:48,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 288 transitions, 4260 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 19:06:48,897 INFO L231 Difference]: Finished difference. Result has 187 places, 275 transitions, 3733 flow [2024-06-21 19:06:48,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3452, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3733, PETRI_PLACES=187, PETRI_TRANSITIONS=275} [2024-06-21 19:06:48,897 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-21 19:06:48,897 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 275 transitions, 3733 flow [2024-06-21 19:06:48,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:48,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:48,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:48,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 19:06:48,897 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:48,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:48,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2054608665, now seen corresponding path program 6 times [2024-06-21 19:06:48,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:48,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007500884] [2024-06-21 19:06:48,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:48,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:50,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:50,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007500884] [2024-06-21 19:06:50,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007500884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:50,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:50,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:06:50,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009039234] [2024-06-21 19:06:50,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:50,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:06:50,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:50,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:06:50,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:06:50,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:50,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 275 transitions, 3733 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 19:06:50,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:50,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:50,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:51,494 INFO L124 PetriNetUnfolderBase]: 3258/5181 cut-off events. [2024-06-21 19:06:51,494 INFO L125 PetriNetUnfolderBase]: For 277574/277577 co-relation queries the response was YES. [2024-06-21 19:06:51,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36659 conditions, 5181 events. 3258/5181 cut-off events. For 277574/277577 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 30284 event pairs, 769 based on Foata normal form. 22/5183 useless extension candidates. Maximal degree in co-relation 36566. Up to 4187 conditions per place. [2024-06-21 19:06:51,539 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 186 selfloop transitions, 112 changer transitions 0/305 dead transitions. [2024-06-21 19:06:51,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 305 transitions, 4441 flow [2024-06-21 19:06:51,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:06:51,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:06:51,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 19:06:51,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:06:51,541 INFO L175 Difference]: Start difference. First operand has 187 places, 275 transitions, 3733 flow. Second operand 9 states and 162 transitions. [2024-06-21 19:06:51,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 305 transitions, 4441 flow [2024-06-21 19:06:51,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 305 transitions, 4309 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-21 19:06:51,918 INFO L231 Difference]: Finished difference. Result has 192 places, 275 transitions, 3836 flow [2024-06-21 19:06:51,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3601, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3836, PETRI_PLACES=192, PETRI_TRANSITIONS=275} [2024-06-21 19:06:51,918 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-21 19:06:51,918 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 275 transitions, 3836 flow [2024-06-21 19:06:51,919 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 19:06:51,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:51,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:51,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 19:06:51,919 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:51,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:51,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1983642919, now seen corresponding path program 2 times [2024-06-21 19:06:51,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:51,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993222270] [2024-06-21 19:06:51,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:51,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:53,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:53,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993222270] [2024-06-21 19:06:53,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993222270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:53,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:53,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:06:53,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851611169] [2024-06-21 19:06:53,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:53,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:06:53,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:53,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:06:53,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:06:53,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:53,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 275 transitions, 3836 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:53,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:53,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:53,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:54,994 INFO L124 PetriNetUnfolderBase]: 3238/5147 cut-off events. [2024-06-21 19:06:54,995 INFO L125 PetriNetUnfolderBase]: For 272023/272026 co-relation queries the response was YES. [2024-06-21 19:06:55,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36540 conditions, 5147 events. 3238/5147 cut-off events. For 272023/272026 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 30051 event pairs, 744 based on Foata normal form. 14/5141 useless extension candidates. Maximal degree in co-relation 36445. Up to 4065 conditions per place. [2024-06-21 19:06:55,046 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 187 selfloop transitions, 113 changer transitions 0/307 dead transitions. [2024-06-21 19:06:55,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 307 transitions, 4556 flow [2024-06-21 19:06:55,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:06:55,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:06:55,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 19:06:55,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 19:06:55,048 INFO L175 Difference]: Start difference. First operand has 192 places, 275 transitions, 3836 flow. Second operand 9 states and 164 transitions. [2024-06-21 19:06:55,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 307 transitions, 4556 flow [2024-06-21 19:06:55,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 307 transitions, 4222 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 19:06:55,501 INFO L231 Difference]: Finished difference. Result has 192 places, 275 transitions, 3734 flow [2024-06-21 19:06:55,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3502, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3734, PETRI_PLACES=192, PETRI_TRANSITIONS=275} [2024-06-21 19:06:55,502 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-21 19:06:55,502 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 275 transitions, 3734 flow [2024-06-21 19:06:55,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:55,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:55,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:55,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 19:06:55,502 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:55,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:55,503 INFO L85 PathProgramCache]: Analyzing trace with hash 327304351, now seen corresponding path program 3 times [2024-06-21 19:06:55,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:55,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523342139] [2024-06-21 19:06:55,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:55,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:57,132 INFO 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 19:06:57,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:57,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523342139] [2024-06-21 19:06:57,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523342139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:57,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:57,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:06:57,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721587573] [2024-06-21 19:06:57,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:57,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:06:57,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:57,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:06:57,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:06:57,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:57,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 275 transitions, 3734 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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 19:06:57,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:57,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:57,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:58,304 INFO L124 PetriNetUnfolderBase]: 3365/5362 cut-off events. [2024-06-21 19:06:58,305 INFO L125 PetriNetUnfolderBase]: For 296829/296832 co-relation queries the response was YES. [2024-06-21 19:06:58,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38304 conditions, 5362 events. 3365/5362 cut-off events. For 296829/296832 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31638 event pairs, 653 based on Foata normal form. 14/5356 useless extension candidates. Maximal degree in co-relation 38209. Up to 3196 conditions per place. [2024-06-21 19:06:58,357 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 180 selfloop transitions, 124 changer transitions 0/311 dead transitions. [2024-06-21 19:06:58,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 311 transitions, 4688 flow [2024-06-21 19:06:58,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:06:58,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:06:58,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 19:06:58,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 19:06:58,359 INFO L175 Difference]: Start difference. First operand has 192 places, 275 transitions, 3734 flow. Second operand 9 states and 165 transitions. [2024-06-21 19:06:58,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 311 transitions, 4688 flow [2024-06-21 19:06:58,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 311 transitions, 4304 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 19:06:58,860 INFO L231 Difference]: Finished difference. Result has 192 places, 277 transitions, 3670 flow [2024-06-21 19:06:58,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3350, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3670, PETRI_PLACES=192, PETRI_TRANSITIONS=277} [2024-06-21 19:06:58,860 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-21 19:06:58,860 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 277 transitions, 3670 flow [2024-06-21 19:06:58,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 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 19:06:58,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:58,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:58,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 19:06:58,861 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 19:06:58,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:58,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1396388397, now seen corresponding path program 3 times [2024-06-21 19:06:58,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:58,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179661115] [2024-06-21 19:06:58,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:58,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:59,868 INFO 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 19:06:59,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:59,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179661115] [2024-06-21 19:06:59,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179661115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:59,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:59,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:06:59,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938153958] [2024-06-21 19:06:59,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:59,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:06:59,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:59,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:06:59,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:06:59,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:59,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 277 transitions, 3670 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:59,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:59,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:59,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:00,860 INFO L124 PetriNetUnfolderBase]: 3393/5402 cut-off events. [2024-06-21 19:07:00,860 INFO L125 PetriNetUnfolderBase]: For 300630/300633 co-relation queries the response was YES. [2024-06-21 19:07:00,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38387 conditions, 5402 events. 3393/5402 cut-off events. For 300630/300633 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 31915 event pairs, 976 based on Foata normal form. 4/5386 useless extension candidates. Maximal degree in co-relation 38292. Up to 4850 conditions per place. [2024-06-21 19:07:00,905 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 219 selfloop transitions, 75 changer transitions 0/301 dead transitions. [2024-06-21 19:07:00,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 301 transitions, 4706 flow [2024-06-21 19:07:00,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:07:00,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:07:00,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 19:07:00,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:07:00,906 INFO L175 Difference]: Start difference. First operand has 192 places, 277 transitions, 3670 flow. Second operand 8 states and 136 transitions. [2024-06-21 19:07:00,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 301 transitions, 4706 flow [2024-06-21 19:07:01,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 301 transitions, 4554 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 19:07:01,344 INFO L231 Difference]: Finished difference. Result has 196 places, 288 transitions, 3880 flow [2024-06-21 19:07:01,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3518, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3880, PETRI_PLACES=196, PETRI_TRANSITIONS=288} [2024-06-21 19:07:01,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-21 19:07:01,345 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 288 transitions, 3880 flow [2024-06-21 19:07:01,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:01,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:01,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:01,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 19:07:01,345 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 19:07:01,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:01,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1396388769, now seen corresponding path program 2 times [2024-06-21 19:07:01,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:01,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599990639] [2024-06-21 19:07:01,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:01,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:02,365 INFO 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 19:07:02,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:02,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599990639] [2024-06-21 19:07:02,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599990639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:02,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:02,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:02,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075148921] [2024-06-21 19:07:02,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:02,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:02,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:02,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:02,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:02,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:07:02,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 288 transitions, 3880 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:02,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:02,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:07:02,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:03,376 INFO L124 PetriNetUnfolderBase]: 3500/5513 cut-off events. [2024-06-21 19:07:03,377 INFO L125 PetriNetUnfolderBase]: For 311875/311884 co-relation queries the response was YES. [2024-06-21 19:07:03,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39957 conditions, 5513 events. 3500/5513 cut-off events. For 311875/311884 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 32108 event pairs, 1040 based on Foata normal form. 7/5513 useless extension candidates. Maximal degree in co-relation 39859. Up to 5288 conditions per place. [2024-06-21 19:07:03,427 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 262 selfloop transitions, 42 changer transitions 0/308 dead transitions. [2024-06-21 19:07:03,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 308 transitions, 4878 flow [2024-06-21 19:07:03,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:07:03,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:07:03,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 19:07:03,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-21 19:07:03,428 INFO L175 Difference]: Start difference. First operand has 196 places, 288 transitions, 3880 flow. Second operand 8 states and 123 transitions. [2024-06-21 19:07:03,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 308 transitions, 4878 flow [2024-06-21 19:07:03,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 308 transitions, 4740 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-21 19:07:03,792 INFO L231 Difference]: Finished difference. Result has 201 places, 297 transitions, 4006 flow [2024-06-21 19:07:03,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3742, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4006, PETRI_PLACES=201, PETRI_TRANSITIONS=297} [2024-06-21 19:07:03,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-21 19:07:03,792 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 297 transitions, 4006 flow [2024-06-21 19:07:03,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:03,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:03,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:03,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 19:07:03,793 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 19:07:03,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:03,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1396804479, now seen corresponding path program 3 times [2024-06-21 19:07:03,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:03,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985236169] [2024-06-21 19:07:03,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:03,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:04,794 INFO 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 19:07:04,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:04,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985236169] [2024-06-21 19:07:04,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985236169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:04,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:04,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:04,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557422506] [2024-06-21 19:07:04,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:04,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:04,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:04,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:04,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:04,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:07:04,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 297 transitions, 4006 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:04,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:04,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:07:04,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:05,777 INFO L124 PetriNetUnfolderBase]: 3497/5509 cut-off events. [2024-06-21 19:07:05,777 INFO L125 PetriNetUnfolderBase]: For 320644/320653 co-relation queries the response was YES. [2024-06-21 19:07:05,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39953 conditions, 5509 events. 3497/5509 cut-off events. For 320644/320653 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 32149 event pairs, 1040 based on Foata normal form. 7/5509 useless extension candidates. Maximal degree in co-relation 39853. Up to 5285 conditions per place. [2024-06-21 19:07:05,836 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 258 selfloop transitions, 45 changer transitions 0/307 dead transitions. [2024-06-21 19:07:05,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 307 transitions, 4738 flow [2024-06-21 19:07:05,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:07:05,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:07:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 19:07:05,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-21 19:07:05,836 INFO L175 Difference]: Start difference. First operand has 201 places, 297 transitions, 4006 flow. Second operand 7 states and 113 transitions. [2024-06-21 19:07:05,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 307 transitions, 4738 flow [2024-06-21 19:07:06,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 307 transitions, 4621 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-21 19:07:06,519 INFO L231 Difference]: Finished difference. Result has 205 places, 297 transitions, 3985 flow [2024-06-21 19:07:06,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3889, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3985, PETRI_PLACES=205, PETRI_TRANSITIONS=297} [2024-06-21 19:07:06,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-21 19:07:06,519 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 297 transitions, 3985 flow [2024-06-21 19:07:06,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:06,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:06,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:06,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 19:07:06,520 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:07:06,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:06,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1408665331, now seen corresponding path program 7 times [2024-06-21 19:07:06,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:06,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405977327] [2024-06-21 19:07:06,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:06,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:07,665 INFO 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 19:07:07,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:07,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405977327] [2024-06-21 19:07:07,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405977327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:07,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:07,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:07:07,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288386348] [2024-06-21 19:07:07,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:07,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:07:07,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:07,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:07:07,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:07:07,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:07,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 297 transitions, 3985 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 19:07:07,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:07,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:07,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:08,998 INFO L124 PetriNetUnfolderBase]: 3499/5557 cut-off events. [2024-06-21 19:07:08,999 INFO L125 PetriNetUnfolderBase]: For 348405/348408 co-relation queries the response was YES. [2024-06-21 19:07:09,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40452 conditions, 5557 events. 3499/5557 cut-off events. For 348405/348408 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 32831 event pairs, 785 based on Foata normal form. 16/5569 useless extension candidates. Maximal degree in co-relation 40350. Up to 4327 conditions per place. [2024-06-21 19:07:09,059 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 207 selfloop transitions, 123 changer transitions 0/340 dead transitions. [2024-06-21 19:07:09,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 340 transitions, 4824 flow [2024-06-21 19:07:09,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:07:09,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:07:09,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 19:07:09,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 19:07:09,061 INFO L175 Difference]: Start difference. First operand has 205 places, 297 transitions, 3985 flow. Second operand 9 states and 180 transitions. [2024-06-21 19:07:09,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 340 transitions, 4824 flow [2024-06-21 19:07:09,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 340 transitions, 4735 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 19:07:09,679 INFO L231 Difference]: Finished difference. Result has 209 places, 299 transitions, 4197 flow [2024-06-21 19:07:09,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3896, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4197, PETRI_PLACES=209, PETRI_TRANSITIONS=299} [2024-06-21 19:07:09,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-21 19:07:09,680 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 299 transitions, 4197 flow [2024-06-21 19:07:09,680 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 19:07:09,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:09,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:09,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 19:07:09,681 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:07:09,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:09,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1475872673, now seen corresponding path program 8 times [2024-06-21 19:07:09,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:09,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401926657] [2024-06-21 19:07:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:09,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:10,796 INFO 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 19:07:10,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:10,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401926657] [2024-06-21 19:07:10,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401926657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:10,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:10,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:07:10,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231850450] [2024-06-21 19:07:10,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:10,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:07:10,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:10,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:07:10,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:07:10,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:10,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 299 transitions, 4197 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 19:07:10,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:10,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:10,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:12,206 INFO L124 PetriNetUnfolderBase]: 4040/6463 cut-off events. [2024-06-21 19:07:12,206 INFO L125 PetriNetUnfolderBase]: For 386952/386955 co-relation queries the response was YES. [2024-06-21 19:07:12,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45987 conditions, 6463 events. 4040/6463 cut-off events. For 386952/386955 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 39931 event pairs, 988 based on Foata normal form. 16/6475 useless extension candidates. Maximal degree in co-relation 45884. Up to 4073 conditions per place. [2024-06-21 19:07:12,273 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 217 selfloop transitions, 132 changer transitions 0/359 dead transitions. [2024-06-21 19:07:12,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 359 transitions, 5435 flow [2024-06-21 19:07:12,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:07:12,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:07:12,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 19:07:12,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-21 19:07:12,274 INFO L175 Difference]: Start difference. First operand has 209 places, 299 transitions, 4197 flow. Second operand 9 states and 181 transitions. [2024-06-21 19:07:12,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 359 transitions, 5435 flow [2024-06-21 19:07:12,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 359 transitions, 5169 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 19:07:12,971 INFO L231 Difference]: Finished difference. Result has 212 places, 312 transitions, 4485 flow [2024-06-21 19:07:12,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3931, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4485, PETRI_PLACES=212, PETRI_TRANSITIONS=312} [2024-06-21 19:07:12,972 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-21 19:07:12,972 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 312 transitions, 4485 flow [2024-06-21 19:07:12,972 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 19:07:12,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:12,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:12,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 19:07:12,973 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:07:12,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:12,974 INFO L85 PathProgramCache]: Analyzing trace with hash 743308863, now seen corresponding path program 9 times [2024-06-21 19:07:12,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:12,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647058346] [2024-06-21 19:07:12,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:12,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:13,853 INFO 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 19:07:13,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:13,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647058346] [2024-06-21 19:07:13,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647058346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:13,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:13,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:13,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973245629] [2024-06-21 19:07:13,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:13,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:13,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:13,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:13,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:13,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 19:07:13,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 312 transitions, 4485 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 19:07:13,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:13,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 19:07:13,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:15,294 INFO L124 PetriNetUnfolderBase]: 3595/6239 cut-off events. [2024-06-21 19:07:15,294 INFO L125 PetriNetUnfolderBase]: For 363916/364162 co-relation queries the response was YES. [2024-06-21 19:07:15,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43070 conditions, 6239 events. 3595/6239 cut-off events. For 363916/364162 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 43737 event pairs, 631 based on Foata normal form. 96/6163 useless extension candidates. Maximal degree in co-relation 42965. Up to 2409 conditions per place. [2024-06-21 19:07:15,357 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 150 selfloop transitions, 142 changer transitions 0/363 dead transitions. [2024-06-21 19:07:15,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 363 transitions, 5470 flow [2024-06-21 19:07:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:07:15,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:07:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-21 19:07:15,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-21 19:07:15,359 INFO L175 Difference]: Start difference. First operand has 212 places, 312 transitions, 4485 flow. Second operand 8 states and 172 transitions. [2024-06-21 19:07:15,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 363 transitions, 5470 flow [2024-06-21 19:07:16,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 363 transitions, 5323 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 19:07:16,033 INFO L231 Difference]: Finished difference. Result has 216 places, 327 transitions, 4868 flow [2024-06-21 19:07:16,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4338, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4868, PETRI_PLACES=216, PETRI_TRANSITIONS=327} [2024-06-21 19:07:16,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-21 19:07:16,034 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 327 transitions, 4868 flow [2024-06-21 19:07:16,034 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 19:07:16,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:16,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:16,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 19:07:16,034 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:07:16,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:16,034 INFO L85 PathProgramCache]: Analyzing trace with hash 505974837, now seen corresponding path program 10 times [2024-06-21 19:07:16,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:16,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934545589] [2024-06-21 19:07:16,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:16,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:17,132 INFO 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 19:07:17,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:17,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934545589] [2024-06-21 19:07:17,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934545589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:17,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:17,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:07:17,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662448346] [2024-06-21 19:07:17,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:17,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:07:17,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:17,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:07:17,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:07:17,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:17,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 327 transitions, 4868 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 19:07:17,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:17,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:17,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:18,905 INFO L124 PetriNetUnfolderBase]: 4609/7445 cut-off events. [2024-06-21 19:07:18,905 INFO L125 PetriNetUnfolderBase]: For 413238/413245 co-relation queries the response was YES. [2024-06-21 19:07:18,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52217 conditions, 7445 events. 4609/7445 cut-off events. For 413238/413245 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 48409 event pairs, 1284 based on Foata normal form. 24/7465 useless extension candidates. Maximal degree in co-relation 52109. Up to 6337 conditions per place. [2024-06-21 19:07:18,987 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 236 selfloop transitions, 122 changer transitions 0/368 dead transitions. [2024-06-21 19:07:18,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 368 transitions, 5782 flow [2024-06-21 19:07:18,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:07:18,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:07:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 19:07:18,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-21 19:07:18,989 INFO L175 Difference]: Start difference. First operand has 216 places, 327 transitions, 4868 flow. Second operand 9 states and 178 transitions. [2024-06-21 19:07:18,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 368 transitions, 5782 flow [2024-06-21 19:07:19,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 368 transitions, 5572 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 19:07:19,608 INFO L231 Difference]: Finished difference. Result has 221 places, 329 transitions, 4994 flow [2024-06-21 19:07:19,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4680, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4994, PETRI_PLACES=221, PETRI_TRANSITIONS=329} [2024-06-21 19:07:19,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-21 19:07:19,609 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 329 transitions, 4994 flow [2024-06-21 19:07:19,609 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 19:07:19,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:19,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:19,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 19:07:19,609 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 19:07:19,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:19,610 INFO L85 PathProgramCache]: Analyzing trace with hash 980244751, now seen corresponding path program 4 times [2024-06-21 19:07:19,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:19,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592929893] [2024-06-21 19:07:19,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:19,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:20,338 INFO 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 19:07:20,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:20,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592929893] [2024-06-21 19:07:20,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592929893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:20,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:20,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:20,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68103167] [2024-06-21 19:07:20,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:20,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:20,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:20,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:20,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:20,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:20,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 329 transitions, 4994 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:20,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:20,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:20,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:21,670 INFO L124 PetriNetUnfolderBase]: 4643/7500 cut-off events. [2024-06-21 19:07:21,670 INFO L125 PetriNetUnfolderBase]: For 408934/408941 co-relation queries the response was YES. [2024-06-21 19:07:21,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52073 conditions, 7500 events. 4643/7500 cut-off events. For 408934/408941 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 49013 event pairs, 1590 based on Foata normal form. 8/7504 useless extension candidates. Maximal degree in co-relation 51964. Up to 6974 conditions per place. [2024-06-21 19:07:21,751 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 285 selfloop transitions, 71 changer transitions 0/366 dead transitions. [2024-06-21 19:07:21,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 366 transitions, 6007 flow [2024-06-21 19:07:21,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:07:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:07:21,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 19:07:21,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-21 19:07:21,752 INFO L175 Difference]: Start difference. First operand has 221 places, 329 transitions, 4994 flow. Second operand 7 states and 139 transitions. [2024-06-21 19:07:21,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 366 transitions, 6007 flow [2024-06-21 19:07:22,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 366 transitions, 5839 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 19:07:22,555 INFO L231 Difference]: Finished difference. Result has 224 places, 343 transitions, 5260 flow [2024-06-21 19:07:22,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4830, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5260, PETRI_PLACES=224, PETRI_TRANSITIONS=343} [2024-06-21 19:07:22,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-21 19:07:22,555 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 343 transitions, 5260 flow [2024-06-21 19:07:22,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:22,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:22,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:22,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 19:07:22,556 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:07:22,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:22,556 INFO L85 PathProgramCache]: Analyzing trace with hash 173359407, now seen corresponding path program 11 times [2024-06-21 19:07:22,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:22,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081363366] [2024-06-21 19:07:22,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:22,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:23,649 INFO 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 19:07:23,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:23,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081363366] [2024-06-21 19:07:23,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081363366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:23,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:23,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:07:23,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688901752] [2024-06-21 19:07:23,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:23,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:07:23,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:23,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:07:23,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:07:23,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:23,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 343 transitions, 5260 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 19:07:23,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:23,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:23,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:25,374 INFO L124 PetriNetUnfolderBase]: 4852/7848 cut-off events. [2024-06-21 19:07:25,375 INFO L125 PetriNetUnfolderBase]: For 435329/435334 co-relation queries the response was YES. [2024-06-21 19:07:25,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53719 conditions, 7848 events. 4852/7848 cut-off events. For 435329/435334 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 51632 event pairs, 1285 based on Foata normal form. 18/7862 useless extension candidates. Maximal degree in co-relation 53609. Up to 6197 conditions per place. [2024-06-21 19:07:25,466 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 252 selfloop transitions, 135 changer transitions 0/397 dead transitions. [2024-06-21 19:07:25,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 397 transitions, 6541 flow [2024-06-21 19:07:25,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:07:25,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:07:25,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 19:07:25,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-21 19:07:25,467 INFO L175 Difference]: Start difference. First operand has 224 places, 343 transitions, 5260 flow. Second operand 9 states and 184 transitions. [2024-06-21 19:07:25,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 397 transitions, 6541 flow [2024-06-21 19:07:26,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 397 transitions, 6360 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 19:07:26,730 INFO L231 Difference]: Finished difference. Result has 229 places, 352 transitions, 5570 flow [2024-06-21 19:07:26,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5079, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5570, PETRI_PLACES=229, PETRI_TRANSITIONS=352} [2024-06-21 19:07:26,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-21 19:07:26,730 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 352 transitions, 5570 flow [2024-06-21 19:07:26,730 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 19:07:26,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:26,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:26,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 19:07:26,731 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:07:26,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:26,732 INFO L85 PathProgramCache]: Analyzing trace with hash 2009032633, now seen corresponding path program 12 times [2024-06-21 19:07:26,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:26,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9469210] [2024-06-21 19:07:26,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:26,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:27,863 INFO 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 19:07:27,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:27,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9469210] [2024-06-21 19:07:27,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9469210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:27,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:27,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:07:27,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143624164] [2024-06-21 19:07:27,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:27,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:07:27,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:27,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:07:27,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:07:27,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:27,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 352 transitions, 5570 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 19:07:27,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:27,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:27,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:29,700 INFO L124 PetriNetUnfolderBase]: 4865/7867 cut-off events. [2024-06-21 19:07:29,700 INFO L125 PetriNetUnfolderBase]: For 435075/435078 co-relation queries the response was YES. [2024-06-21 19:07:29,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53810 conditions, 7867 events. 4865/7867 cut-off events. For 435075/435078 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 51738 event pairs, 1284 based on Foata normal form. 20/7883 useless extension candidates. Maximal degree in co-relation 53698. Up to 6741 conditions per place. [2024-06-21 19:07:29,781 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 261 selfloop transitions, 120 changer transitions 0/391 dead transitions. [2024-06-21 19:07:29,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 391 transitions, 6479 flow [2024-06-21 19:07:29,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:07:29,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:07:29,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 19:07:29,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-21 19:07:29,783 INFO L175 Difference]: Start difference. First operand has 229 places, 352 transitions, 5570 flow. Second operand 9 states and 176 transitions. [2024-06-21 19:07:29,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 391 transitions, 6479 flow [2024-06-21 19:07:30,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 391 transitions, 6190 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 19:07:30,813 INFO L231 Difference]: Finished difference. Result has 232 places, 353 transitions, 5554 flow [2024-06-21 19:07:30,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5282, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5554, PETRI_PLACES=232, PETRI_TRANSITIONS=353} [2024-06-21 19:07:30,814 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-21 19:07:30,814 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 353 transitions, 5554 flow [2024-06-21 19:07:30,814 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 19:07:30,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:30,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:30,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 19:07:30,814 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:07:30,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:30,814 INFO L85 PathProgramCache]: Analyzing trace with hash 179084859, now seen corresponding path program 4 times [2024-06-21 19:07:30,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:30,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453201058] [2024-06-21 19:07:30,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:30,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:32,525 INFO 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 19:07:32,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:32,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453201058] [2024-06-21 19:07:32,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453201058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:32,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:32,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:07:32,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531867150] [2024-06-21 19:07:32,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:32,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:07:32,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:32,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:07:32,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:07:32,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:32,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 353 transitions, 5554 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:32,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:32,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:32,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:34,360 INFO L124 PetriNetUnfolderBase]: 4992/8078 cut-off events. [2024-06-21 19:07:34,360 INFO L125 PetriNetUnfolderBase]: For 419474/419477 co-relation queries the response was YES. [2024-06-21 19:07:34,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54011 conditions, 8078 events. 4992/8078 cut-off events. For 419474/419477 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 53489 event pairs, 1275 based on Foata normal form. 12/8086 useless extension candidates. Maximal degree in co-relation 53898. Up to 6266 conditions per place. [2024-06-21 19:07:34,460 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 259 selfloop transitions, 129 changer transitions 0/398 dead transitions. [2024-06-21 19:07:34,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 398 transitions, 6465 flow [2024-06-21 19:07:34,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:07:34,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:07:34,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 19:07:34,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-21 19:07:34,461 INFO L175 Difference]: Start difference. First operand has 232 places, 353 transitions, 5554 flow. Second operand 9 states and 176 transitions. [2024-06-21 19:07:34,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 398 transitions, 6465 flow [2024-06-21 19:07:35,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 398 transitions, 6205 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 19:07:35,465 INFO L231 Difference]: Finished difference. Result has 234 places, 358 transitions, 5599 flow [2024-06-21 19:07:35,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5208, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5599, PETRI_PLACES=234, PETRI_TRANSITIONS=358} [2024-06-21 19:07:35,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-21 19:07:35,466 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 358 transitions, 5599 flow [2024-06-21 19:07:35,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:35,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:35,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:35,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 19:07:35,466 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 19:07:35,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:35,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1260300129, now seen corresponding path program 5 times [2024-06-21 19:07:35,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:35,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413248939] [2024-06-21 19:07:35,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:35,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:36,217 INFO 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 19:07:36,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:36,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413248939] [2024-06-21 19:07:36,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413248939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:36,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:36,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:36,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768199637] [2024-06-21 19:07:36,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:36,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:36,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:36,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:36,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:36,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:36,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 358 transitions, 5599 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:36,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:36,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:36,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:37,801 INFO L124 PetriNetUnfolderBase]: 5017/8124 cut-off events. [2024-06-21 19:07:37,801 INFO L125 PetriNetUnfolderBase]: For 420509/420514 co-relation queries the response was YES. [2024-06-21 19:07:37,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54810 conditions, 8124 events. 5017/8124 cut-off events. For 420509/420514 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 54208 event pairs, 1728 based on Foata normal form. 6/8126 useless extension candidates. Maximal degree in co-relation 54695. Up to 7576 conditions per place. [2024-06-21 19:07:37,888 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 70 changer transitions 0/390 dead transitions. [2024-06-21 19:07:37,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 390 transitions, 6574 flow [2024-06-21 19:07:37,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:07:37,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:07:37,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 19:07:37,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-21 19:07:37,889 INFO L175 Difference]: Start difference. First operand has 234 places, 358 transitions, 5599 flow. Second operand 7 states and 137 transitions. [2024-06-21 19:07:37,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 390 transitions, 6574 flow [2024-06-21 19:07:38,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 390 transitions, 6255 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 19:07:38,956 INFO L231 Difference]: Finished difference. Result has 234 places, 369 transitions, 5608 flow [2024-06-21 19:07:38,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5280, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5608, PETRI_PLACES=234, PETRI_TRANSITIONS=369} [2024-06-21 19:07:38,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-21 19:07:38,957 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 369 transitions, 5608 flow [2024-06-21 19:07:38,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:38,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:38,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:38,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 19:07:38,958 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 19:07:38,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:38,958 INFO L85 PathProgramCache]: Analyzing trace with hash -639752979, now seen corresponding path program 6 times [2024-06-21 19:07:38,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:38,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405039884] [2024-06-21 19:07:38,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:38,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:39,792 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 19:07:39,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:39,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405039884] [2024-06-21 19:07:39,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405039884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:39,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:39,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:39,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137849598] [2024-06-21 19:07:39,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:39,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:39,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:39,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:39,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:39,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:39,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 369 transitions, 5608 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:39,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:39,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:39,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:41,589 INFO L124 PetriNetUnfolderBase]: 5049/8173 cut-off events. [2024-06-21 19:07:41,589 INFO L125 PetriNetUnfolderBase]: For 406579/406582 co-relation queries the response was YES. [2024-06-21 19:07:41,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54451 conditions, 8173 events. 5049/8173 cut-off events. For 406579/406582 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 54541 event pairs, 1739 based on Foata normal form. 4/8173 useless extension candidates. Maximal degree in co-relation 54336. Up to 7552 conditions per place. [2024-06-21 19:07:41,690 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 307 selfloop transitions, 84 changer transitions 0/401 dead transitions. [2024-06-21 19:07:41,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 401 transitions, 6774 flow [2024-06-21 19:07:41,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:07:41,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:07:41,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 19:07:41,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:07:41,691 INFO L175 Difference]: Start difference. First operand has 234 places, 369 transitions, 5608 flow. Second operand 8 states and 144 transitions. [2024-06-21 19:07:41,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 401 transitions, 6774 flow [2024-06-21 19:07:42,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 401 transitions, 6503 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 19:07:42,437 INFO L231 Difference]: Finished difference. Result has 236 places, 382 transitions, 5790 flow [2024-06-21 19:07:42,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5337, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5790, PETRI_PLACES=236, PETRI_TRANSITIONS=382} [2024-06-21 19:07:42,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-21 19:07:42,438 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 382 transitions, 5790 flow [2024-06-21 19:07:42,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:42,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:42,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:42,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 19:07:42,438 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 19:07:42,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:42,439 INFO L85 PathProgramCache]: Analyzing trace with hash -639752607, now seen corresponding path program 4 times [2024-06-21 19:07:42,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:42,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805839083] [2024-06-21 19:07:42,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:42,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:43,279 INFO 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 19:07:43,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:43,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805839083] [2024-06-21 19:07:43,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805839083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:43,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:43,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:43,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62101022] [2024-06-21 19:07:43,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:43,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:43,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:43,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:43,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:43,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:07:43,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 382 transitions, 5790 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:43,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:43,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:07:43,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:44,832 INFO L124 PetriNetUnfolderBase]: 5145/8275 cut-off events. [2024-06-21 19:07:44,833 INFO L125 PetriNetUnfolderBase]: For 413859/413861 co-relation queries the response was YES. [2024-06-21 19:07:44,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55264 conditions, 8275 events. 5145/8275 cut-off events. For 413859/413861 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 54777 event pairs, 2156 based on Foata normal form. 3/8275 useless extension candidates. Maximal degree in co-relation 55147. Up to 7978 conditions per place. [2024-06-21 19:07:44,930 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 370 selfloop transitions, 29 changer transitions 0/403 dead transitions. [2024-06-21 19:07:44,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 403 transitions, 6665 flow [2024-06-21 19:07:44,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:07:44,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:07:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 19:07:44,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-21 19:07:44,931 INFO L175 Difference]: Start difference. First operand has 236 places, 382 transitions, 5790 flow. Second operand 7 states and 120 transitions. [2024-06-21 19:07:44,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 403 transitions, 6665 flow [2024-06-21 19:07:45,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 403 transitions, 6381 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-21 19:07:45,851 INFO L231 Difference]: Finished difference. Result has 237 places, 385 transitions, 5601 flow [2024-06-21 19:07:45,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5506, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5601, PETRI_PLACES=237, PETRI_TRANSITIONS=385} [2024-06-21 19:07:45,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-21 19:07:45,851 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 385 transitions, 5601 flow [2024-06-21 19:07:45,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:45,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:45,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:45,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 19:07:45,852 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 19:07:45,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:45,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1219321605, now seen corresponding path program 1 times [2024-06-21 19:07:45,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:45,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335865618] [2024-06-21 19:07:45,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:45,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:46,649 INFO 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 19:07:46,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:46,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335865618] [2024-06-21 19:07:46,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335865618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:46,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:46,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:46,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050646294] [2024-06-21 19:07:46,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:46,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:46,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:46,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:46,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:46,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:07:46,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 385 transitions, 5601 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:46,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:46,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:07:46,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:48,168 INFO L124 PetriNetUnfolderBase]: 4852/7947 cut-off events. [2024-06-21 19:07:48,169 INFO L125 PetriNetUnfolderBase]: For 370273/370273 co-relation queries the response was YES. [2024-06-21 19:07:48,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51661 conditions, 7947 events. 4852/7947 cut-off events. For 370273/370273 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 53740 event pairs, 2197 based on Foata normal form. 1/7945 useless extension candidates. Maximal degree in co-relation 51544. Up to 7506 conditions per place. [2024-06-21 19:07:48,261 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 375 selfloop transitions, 19 changer transitions 0/406 dead transitions. [2024-06-21 19:07:48,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 406 transitions, 6500 flow [2024-06-21 19:07:48,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:07:48,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:07:48,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 19:07:48,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:07:48,262 INFO L175 Difference]: Start difference. First operand has 237 places, 385 transitions, 5601 flow. Second operand 7 states and 126 transitions. [2024-06-21 19:07:48,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 406 transitions, 6500 flow [2024-06-21 19:07:49,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 406 transitions, 6410 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 19:07:49,304 INFO L231 Difference]: Finished difference. Result has 238 places, 391 transitions, 5622 flow [2024-06-21 19:07:49,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5511, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5622, PETRI_PLACES=238, PETRI_TRANSITIONS=391} [2024-06-21 19:07:49,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-21 19:07:49,305 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 391 transitions, 5622 flow [2024-06-21 19:07:49,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:49,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:49,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:49,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 19:07:49,305 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 19:07:49,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:49,306 INFO L85 PathProgramCache]: Analyzing trace with hash 952756671, now seen corresponding path program 2 times [2024-06-21 19:07:49,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:49,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433537103] [2024-06-21 19:07:49,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:49,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:50,161 INFO 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 19:07:50,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:50,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433537103] [2024-06-21 19:07:50,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433537103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:50,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:50,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:50,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117496661] [2024-06-21 19:07:50,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:50,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:50,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:50,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:50,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:50,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:07:50,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 391 transitions, 5622 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:50,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:50,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:07:50,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:51,769 INFO L124 PetriNetUnfolderBase]: 4865/7965 cut-off events. [2024-06-21 19:07:51,769 INFO L125 PetriNetUnfolderBase]: For 382792/382792 co-relation queries the response was YES. [2024-06-21 19:07:51,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52645 conditions, 7965 events. 4865/7965 cut-off events. For 382792/382792 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 53826 event pairs, 2238 based on Foata normal form. 1/7963 useless extension candidates. Maximal degree in co-relation 52526. Up to 7514 conditions per place. [2024-06-21 19:07:51,869 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 372 selfloop transitions, 26 changer transitions 0/410 dead transitions. [2024-06-21 19:07:51,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 410 transitions, 6668 flow [2024-06-21 19:07:51,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:07:51,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:07:51,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 19:07:51,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 19:07:51,870 INFO L175 Difference]: Start difference. First operand has 238 places, 391 transitions, 5622 flow. Second operand 7 states and 127 transitions. [2024-06-21 19:07:51,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 410 transitions, 6668 flow [2024-06-21 19:07:52,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 410 transitions, 6629 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 19:07:52,930 INFO L231 Difference]: Finished difference. Result has 244 places, 397 transitions, 5751 flow [2024-06-21 19:07:52,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5583, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5751, PETRI_PLACES=244, PETRI_TRANSITIONS=397} [2024-06-21 19:07:52,931 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-21 19:07:52,931 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 397 transitions, 5751 flow [2024-06-21 19:07:52,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:52,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:52,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:52,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 19:07:52,931 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 19:07:52,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:52,931 INFO L85 PathProgramCache]: Analyzing trace with hash 527701785, now seen corresponding path program 1 times [2024-06-21 19:07:52,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:52,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995105698] [2024-06-21 19:07:52,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:52,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:53,802 INFO 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 19:07:53,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:53,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995105698] [2024-06-21 19:07:53,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995105698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:53,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:53,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:53,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379743508] [2024-06-21 19:07:53,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:53,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:53,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:53,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:53,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:53,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:53,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 397 transitions, 5751 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:53,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:53,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:53,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:55,286 INFO L124 PetriNetUnfolderBase]: 4964/8066 cut-off events. [2024-06-21 19:07:55,286 INFO L125 PetriNetUnfolderBase]: For 395295/395295 co-relation queries the response was YES. [2024-06-21 19:07:55,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54426 conditions, 8066 events. 4964/8066 cut-off events. For 395295/395295 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 53956 event pairs, 2230 based on Foata normal form. 1/8064 useless extension candidates. Maximal degree in co-relation 54303. Up to 7736 conditions per place. [2024-06-21 19:07:55,374 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 391 selfloop transitions, 16 changer transitions 0/412 dead transitions. [2024-06-21 19:07:55,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 412 transitions, 6655 flow [2024-06-21 19:07:55,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:07:55,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:07:55,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 19:07:55,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 19:07:55,375 INFO L175 Difference]: Start difference. First operand has 244 places, 397 transitions, 5751 flow. Second operand 7 states and 116 transitions. [2024-06-21 19:07:55,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 412 transitions, 6655 flow [2024-06-21 19:07:56,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 412 transitions, 6587 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 19:07:56,289 INFO L231 Difference]: Finished difference. Result has 248 places, 400 transitions, 5779 flow [2024-06-21 19:07:56,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5685, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5779, PETRI_PLACES=248, PETRI_TRANSITIONS=400} [2024-06-21 19:07:56,290 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-21 19:07:56,290 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 400 transitions, 5779 flow [2024-06-21 19:07:56,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:56,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:56,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:56,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 19:07:56,290 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 19:07:56,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:56,292 INFO L85 PathProgramCache]: Analyzing trace with hash 534130689, now seen corresponding path program 3 times [2024-06-21 19:07:56,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:56,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371811723] [2024-06-21 19:07:56,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:56,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:57,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:07:57,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:57,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371811723] [2024-06-21 19:07:57,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371811723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:57,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:57,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:07:57,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020698377] [2024-06-21 19:07:57,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:57,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:07:57,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:57,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:07:57,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:07:57,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:07:57,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 400 transitions, 5779 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:57,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:57,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:07:57,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:58,741 INFO L124 PetriNetUnfolderBase]: 4877/7979 cut-off events. [2024-06-21 19:07:58,741 INFO L125 PetriNetUnfolderBase]: For 405300/405306 co-relation queries the response was YES. [2024-06-21 19:07:58,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54287 conditions, 7979 events. 4877/7979 cut-off events. For 405300/405306 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 53882 event pairs, 2249 based on Foata normal form. 2/7977 useless extension candidates. Maximal degree in co-relation 54163. Up to 7516 conditions per place. [2024-06-21 19:07:58,839 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 367 selfloop transitions, 33 changer transitions 0/413 dead transitions. [2024-06-21 19:07:58,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 413 transitions, 6781 flow [2024-06-21 19:07:58,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:07:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:07:58,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 19:07:58,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:07:58,840 INFO L175 Difference]: Start difference. First operand has 248 places, 400 transitions, 5779 flow. Second operand 7 states and 126 transitions. [2024-06-21 19:07:58,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 413 transitions, 6781 flow [2024-06-21 19:07:59,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 413 transitions, 6709 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 19:07:59,785 INFO L231 Difference]: Finished difference. Result has 250 places, 403 transitions, 5835 flow [2024-06-21 19:07:59,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5707, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5835, PETRI_PLACES=250, PETRI_TRANSITIONS=403} [2024-06-21 19:07:59,785 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 19:07:59,785 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 403 transitions, 5835 flow [2024-06-21 19:07:59,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:59,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:59,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:59,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 19:07:59,786 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 19:07:59,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:59,786 INFO L85 PathProgramCache]: Analyzing trace with hash 957398487, now seen corresponding path program 2 times [2024-06-21 19:07:59,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:59,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90126794] [2024-06-21 19:07:59,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:59,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:08:00,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:00,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90126794] [2024-06-21 19:08:00,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90126794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:00,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:00,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:08:00,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431880622] [2024-06-21 19:08:00,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:00,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:08:00,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:00,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:08:00,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:08:00,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:08:00,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 403 transitions, 5835 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:00,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:00,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:08:00,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:02,342 INFO L124 PetriNetUnfolderBase]: 4966/8070 cut-off events. [2024-06-21 19:08:02,342 INFO L125 PetriNetUnfolderBase]: For 413830/413836 co-relation queries the response was YES. [2024-06-21 19:08:02,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55540 conditions, 8070 events. 4966/8070 cut-off events. For 413830/413836 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 54077 event pairs, 2276 based on Foata normal form. 5/8071 useless extension candidates. Maximal degree in co-relation 55415. Up to 7723 conditions per place. [2024-06-21 19:08:02,440 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 386 selfloop transitions, 28 changer transitions 0/419 dead transitions. [2024-06-21 19:08:02,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 419 transitions, 6933 flow [2024-06-21 19:08:02,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:08:02,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:08:02,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 19:08:02,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 19:08:02,441 INFO L175 Difference]: Start difference. First operand has 250 places, 403 transitions, 5835 flow. Second operand 7 states and 118 transitions. [2024-06-21 19:08:02,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 419 transitions, 6933 flow [2024-06-21 19:08:03,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 419 transitions, 6827 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 19:08:03,426 INFO L231 Difference]: Finished difference. Result has 252 places, 409 transitions, 5913 flow [2024-06-21 19:08:03,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5729, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5913, PETRI_PLACES=252, PETRI_TRANSITIONS=409} [2024-06-21 19:08:03,427 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-21 19:08:03,427 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 409 transitions, 5913 flow [2024-06-21 19:08:03,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:03,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:03,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:08:03,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 19:08:03,428 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 19:08:03,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:03,428 INFO L85 PathProgramCache]: Analyzing trace with hash 534368025, now seen corresponding path program 3 times [2024-06-21 19:08:03,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:03,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320869416] [2024-06-21 19:08:03,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:03,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:08:04,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:04,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320869416] [2024-06-21 19:08:04,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320869416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:04,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:04,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:08:04,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092057883] [2024-06-21 19:08:04,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:04,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:08:04,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:04,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:08:04,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:08:04,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:08:04,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 409 transitions, 5913 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:04,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:04,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:08:04,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:06,059 INFO L124 PetriNetUnfolderBase]: 4963/8066 cut-off events. [2024-06-21 19:08:06,059 INFO L125 PetriNetUnfolderBase]: For 424284/424290 co-relation queries the response was YES. [2024-06-21 19:08:06,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55816 conditions, 8066 events. 4963/8066 cut-off events. For 424284/424290 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 54068 event pairs, 2276 based on Foata normal form. 5/8067 useless extension candidates. Maximal degree in co-relation 55690. Up to 7720 conditions per place. [2024-06-21 19:08:06,178 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 384 selfloop transitions, 29 changer transitions 0/418 dead transitions. [2024-06-21 19:08:06,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 418 transitions, 6765 flow [2024-06-21 19:08:06,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:08:06,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:08:06,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 19:08:06,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 19:08:06,180 INFO L175 Difference]: Start difference. First operand has 252 places, 409 transitions, 5913 flow. Second operand 7 states and 116 transitions. [2024-06-21 19:08:06,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 418 transitions, 6765 flow [2024-06-21 19:08:07,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 418 transitions, 6644 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-21 19:08:07,243 INFO L231 Difference]: Finished difference. Result has 256 places, 409 transitions, 5856 flow [2024-06-21 19:08:07,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5792, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5856, PETRI_PLACES=256, PETRI_TRANSITIONS=409} [2024-06-21 19:08:07,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-21 19:08:07,243 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 409 transitions, 5856 flow [2024-06-21 19:08:07,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:07,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:07,243 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 19:08:07,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 19:08:07,243 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 19:08:07,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:07,244 INFO L85 PathProgramCache]: Analyzing trace with hash 717321580, now seen corresponding path program 1 times [2024-06-21 19:08:07,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:07,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123774355] [2024-06-21 19:08:07,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:07,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:08:08,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:08,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123774355] [2024-06-21 19:08:08,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123774355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:08,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:08,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:08:08,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860452052] [2024-06-21 19:08:08,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:08,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:08:08,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:08,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:08:08,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:08:08,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:08:08,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 409 transitions, 5856 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:08,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:08,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:08:08,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:09,644 INFO L124 PetriNetUnfolderBase]: 5103/8245 cut-off events. [2024-06-21 19:08:09,644 INFO L125 PetriNetUnfolderBase]: For 512349/512355 co-relation queries the response was YES. [2024-06-21 19:08:09,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59232 conditions, 8245 events. 5103/8245 cut-off events. For 512349/512355 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 54791 event pairs, 1789 based on Foata normal form. 8/8240 useless extension candidates. Maximal degree in co-relation 59104. Up to 7691 conditions per place. [2024-06-21 19:08:09,746 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 355 selfloop transitions, 63 changer transitions 0/432 dead transitions. [2024-06-21 19:08:09,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 432 transitions, 6908 flow [2024-06-21 19:08:09,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:08:09,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:08:09,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 19:08:09,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 19:08:09,747 INFO L175 Difference]: Start difference. First operand has 256 places, 409 transitions, 5856 flow. Second operand 8 states and 138 transitions. [2024-06-21 19:08:09,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 432 transitions, 6908 flow [2024-06-21 19:08:10,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 432 transitions, 6840 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 19:08:10,825 INFO L231 Difference]: Finished difference. Result has 258 places, 417 transitions, 6093 flow [2024-06-21 19:08:10,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5788, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6093, PETRI_PLACES=258, PETRI_TRANSITIONS=417} [2024-06-21 19:08:10,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-21 19:08:10,826 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 417 transitions, 6093 flow [2024-06-21 19:08:10,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:10,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:10,826 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 19:08:10,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 19:08:10,826 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 19:08:10,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:10,826 INFO L85 PathProgramCache]: Analyzing trace with hash -2053847040, now seen corresponding path program 2 times [2024-06-21 19:08:10,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:10,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107813047] [2024-06-21 19:08:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:10,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:11,715 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 19:08:11,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:11,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107813047] [2024-06-21 19:08:11,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107813047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:11,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:11,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:08:11,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113768045] [2024-06-21 19:08:11,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:11,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:08:11,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:11,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:08:11,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:08:11,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:08:11,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 417 transitions, 6093 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:11,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:11,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:08:11,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:13,316 INFO L124 PetriNetUnfolderBase]: 5107/8247 cut-off events. [2024-06-21 19:08:13,316 INFO L125 PetriNetUnfolderBase]: For 523455/523461 co-relation queries the response was YES. [2024-06-21 19:08:13,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59633 conditions, 8247 events. 5107/8247 cut-off events. For 523455/523461 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 54785 event pairs, 1713 based on Foata normal form. 8/8242 useless extension candidates. Maximal degree in co-relation 59504. Up to 7625 conditions per place. [2024-06-21 19:08:13,421 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 333 selfloop transitions, 89 changer transitions 0/436 dead transitions. [2024-06-21 19:08:13,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 436 transitions, 7249 flow [2024-06-21 19:08:13,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:08:13,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:08:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 19:08:13,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-21 19:08:13,422 INFO L175 Difference]: Start difference. First operand has 258 places, 417 transitions, 6093 flow. Second operand 7 states and 128 transitions. [2024-06-21 19:08:13,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 436 transitions, 7249 flow [2024-06-21 19:08:14,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 436 transitions, 7067 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 19:08:14,621 INFO L231 Difference]: Finished difference. Result has 260 places, 423 transitions, 6252 flow [2024-06-21 19:08:14,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5911, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6252, PETRI_PLACES=260, PETRI_TRANSITIONS=423} [2024-06-21 19:08:14,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-21 19:08:14,621 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 423 transitions, 6252 flow [2024-06-21 19:08:14,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:14,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:14,622 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 19:08:14,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 19:08:14,622 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 19:08:14,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:14,622 INFO L85 PathProgramCache]: Analyzing trace with hash 307627603, now seen corresponding path program 1 times [2024-06-21 19:08:14,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:14,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307501748] [2024-06-21 19:08:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:14,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:15,610 INFO 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 19:08:15,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:15,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307501748] [2024-06-21 19:08:15,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307501748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:15,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:15,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:08:15,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954952043] [2024-06-21 19:08:15,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:15,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:08:15,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:15,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:08:15,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:08:15,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:08:15,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 423 transitions, 6252 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:15,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:15,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:08:15,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:17,289 INFO L124 PetriNetUnfolderBase]: 5201/8347 cut-off events. [2024-06-21 19:08:17,289 INFO L125 PetriNetUnfolderBase]: For 532010/532016 co-relation queries the response was YES. [2024-06-21 19:08:17,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60337 conditions, 8347 events. 5201/8347 cut-off events. For 532010/532016 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 54979 event pairs, 1771 based on Foata normal form. 6/8340 useless extension candidates. Maximal degree in co-relation 60207. Up to 7878 conditions per place. [2024-06-21 19:08:17,397 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 366 selfloop transitions, 73 changer transitions 0/443 dead transitions. [2024-06-21 19:08:17,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 443 transitions, 7260 flow [2024-06-21 19:08:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:08:17,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:08:17,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 19:08:17,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 19:08:17,398 INFO L175 Difference]: Start difference. First operand has 260 places, 423 transitions, 6252 flow. Second operand 9 states and 145 transitions. [2024-06-21 19:08:17,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 443 transitions, 7260 flow [2024-06-21 19:08:18,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 443 transitions, 7043 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-21 19:08:18,497 INFO L231 Difference]: Finished difference. Result has 265 places, 427 transitions, 6280 flow [2024-06-21 19:08:18,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6035, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6280, PETRI_PLACES=265, PETRI_TRANSITIONS=427} [2024-06-21 19:08:18,497 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-21 19:08:18,497 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 427 transitions, 6280 flow [2024-06-21 19:08:18,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:18,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:18,498 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 19:08:18,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 19:08:18,498 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 19:08:18,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:18,498 INFO L85 PathProgramCache]: Analyzing trace with hash 316882033, now seen corresponding path program 2 times [2024-06-21 19:08:18,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:18,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262530238] [2024-06-21 19:08:18,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:18,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:19,566 INFO 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 19:08:19,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:19,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262530238] [2024-06-21 19:08:19,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262530238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:19,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:19,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:08:19,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33271386] [2024-06-21 19:08:19,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:19,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:08:19,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:19,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:08:19,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:08:19,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:08:19,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 427 transitions, 6280 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:19,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:19,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:08:19,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:21,348 INFO L124 PetriNetUnfolderBase]: 5245/8412 cut-off events. [2024-06-21 19:08:21,348 INFO L125 PetriNetUnfolderBase]: For 556955/556961 co-relation queries the response was YES. [2024-06-21 19:08:21,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61856 conditions, 8412 events. 5245/8412 cut-off events. For 556955/556961 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 55518 event pairs, 1746 based on Foata normal form. 6/8405 useless extension candidates. Maximal degree in co-relation 61725. Up to 7803 conditions per place. [2024-06-21 19:08:21,453 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 98 changer transitions 0/454 dead transitions. [2024-06-21 19:08:21,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 454 transitions, 7752 flow [2024-06-21 19:08:21,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:08:21,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:08:21,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 19:08:21,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-21 19:08:21,454 INFO L175 Difference]: Start difference. First operand has 265 places, 427 transitions, 6280 flow. Second operand 9 states and 146 transitions. [2024-06-21 19:08:21,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 454 transitions, 7752 flow [2024-06-21 19:08:22,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 454 transitions, 7539 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 19:08:22,844 INFO L231 Difference]: Finished difference. Result has 268 places, 439 transitions, 6588 flow [2024-06-21 19:08:22,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6067, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6588, PETRI_PLACES=268, PETRI_TRANSITIONS=439} [2024-06-21 19:08:22,845 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-21 19:08:22,845 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 439 transitions, 6588 flow [2024-06-21 19:08:22,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:22,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:22,845 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 19:08:22,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 19:08:22,845 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 19:08:22,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:22,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1836221543, now seen corresponding path program 3 times [2024-06-21 19:08:22,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:22,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459715915] [2024-06-21 19:08:22,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:22,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:23,953 INFO 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 19:08:23,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:23,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459715915] [2024-06-21 19:08:23,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459715915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:23,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:23,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:08:23,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15950876] [2024-06-21 19:08:23,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:23,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:08:23,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:23,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:08:23,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:08:24,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:08:24,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 439 transitions, 6588 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:24,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:24,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:08:24,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:25,665 INFO L124 PetriNetUnfolderBase]: 5241/8408 cut-off events. [2024-06-21 19:08:25,665 INFO L125 PetriNetUnfolderBase]: For 573009/573015 co-relation queries the response was YES. [2024-06-21 19:08:25,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62734 conditions, 8408 events. 5241/8408 cut-off events. For 573009/573015 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 55445 event pairs, 1746 based on Foata normal form. 6/8401 useless extension candidates. Maximal degree in co-relation 62601. Up to 7801 conditions per place. [2024-06-21 19:08:25,779 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 98 changer transitions 0/454 dead transitions. [2024-06-21 19:08:25,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 454 transitions, 7806 flow [2024-06-21 19:08:25,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:08:25,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:08:25,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 19:08:25,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 19:08:25,780 INFO L175 Difference]: Start difference. First operand has 268 places, 439 transitions, 6588 flow. Second operand 9 states and 145 transitions. [2024-06-21 19:08:25,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 454 transitions, 7806 flow [2024-06-21 19:08:27,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 454 transitions, 7583 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-21 19:08:27,355 INFO L231 Difference]: Finished difference. Result has 273 places, 439 transitions, 6570 flow [2024-06-21 19:08:27,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6365, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6570, PETRI_PLACES=273, PETRI_TRANSITIONS=439} [2024-06-21 19:08:27,355 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-21 19:08:27,355 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 439 transitions, 6570 flow [2024-06-21 19:08:27,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:27,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:27,356 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 19:08:27,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 19:08:27,356 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 19:08:27,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:27,357 INFO L85 PathProgramCache]: Analyzing trace with hash -32517406, now seen corresponding path program 1 times [2024-06-21 19:08:27,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:27,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671403410] [2024-06-21 19:08:27,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:27,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:28,402 INFO 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 19:08:28,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:28,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671403410] [2024-06-21 19:08:28,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671403410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:28,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:28,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:08:28,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060894242] [2024-06-21 19:08:28,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:28,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:08:28,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:28,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:08:28,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:08:28,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:08:28,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 439 transitions, 6570 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:28,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:28,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:08:28,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:30,218 INFO L124 PetriNetUnfolderBase]: 5246/8416 cut-off events. [2024-06-21 19:08:30,218 INFO L125 PetriNetUnfolderBase]: For 580289/580292 co-relation queries the response was YES. [2024-06-21 19:08:30,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63121 conditions, 8416 events. 5246/8416 cut-off events. For 580289/580292 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 55518 event pairs, 1996 based on Foata normal form. 3/8414 useless extension candidates. Maximal degree in co-relation 62986. Up to 8115 conditions per place. [2024-06-21 19:08:30,308 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 419 selfloop transitions, 32 changer transitions 0/455 dead transitions. [2024-06-21 19:08:30,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 455 transitions, 7580 flow [2024-06-21 19:08:30,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:08:30,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:08:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 19:08:30,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-21 19:08:30,309 INFO L175 Difference]: Start difference. First operand has 273 places, 439 transitions, 6570 flow. Second operand 8 states and 125 transitions. [2024-06-21 19:08:30,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 455 transitions, 7580 flow [2024-06-21 19:08:31,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 455 transitions, 7378 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 19:08:31,426 INFO L231 Difference]: Finished difference. Result has 274 places, 442 transitions, 6515 flow [2024-06-21 19:08:31,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6368, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6515, PETRI_PLACES=274, PETRI_TRANSITIONS=442} [2024-06-21 19:08:31,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-21 19:08:31,426 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 442 transitions, 6515 flow [2024-06-21 19:08:31,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:31,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:31,427 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 19:08:31,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 19:08:31,427 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 19:08:31,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:31,427 INFO L85 PathProgramCache]: Analyzing trace with hash -540748568, now seen corresponding path program 3 times [2024-06-21 19:08:31,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:31,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242721477] [2024-06-21 19:08:31,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:31,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:32,216 INFO 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 19:08:32,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:32,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242721477] [2024-06-21 19:08:32,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242721477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:32,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:32,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:08:32,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920460876] [2024-06-21 19:08:32,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:32,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:08:32,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:32,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:08:32,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:08:32,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:08:32,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 442 transitions, 6515 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:32,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:32,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:08:32,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:33,931 INFO L124 PetriNetUnfolderBase]: 5161/8320 cut-off events. [2024-06-21 19:08:33,932 INFO L125 PetriNetUnfolderBase]: For 592823/592823 co-relation queries the response was YES. [2024-06-21 19:08:33,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62715 conditions, 8320 events. 5161/8320 cut-off events. For 592823/592823 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 55084 event pairs, 1714 based on Foata normal form. 2/8304 useless extension candidates. Maximal degree in co-relation 62579. Up to 7759 conditions per place. [2024-06-21 19:08:34,026 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 371 selfloop transitions, 68 changer transitions 0/457 dead transitions. [2024-06-21 19:08:34,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 457 transitions, 7461 flow [2024-06-21 19:08:34,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:08:34,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:08:34,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 19:08:34,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:08:34,027 INFO L175 Difference]: Start difference. First operand has 274 places, 442 transitions, 6515 flow. Second operand 7 states and 126 transitions. [2024-06-21 19:08:34,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 457 transitions, 7461 flow [2024-06-21 19:08:35,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 457 transitions, 7282 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-21 19:08:35,754 INFO L231 Difference]: Finished difference. Result has 275 places, 442 transitions, 6482 flow [2024-06-21 19:08:35,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6336, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6482, PETRI_PLACES=275, PETRI_TRANSITIONS=442} [2024-06-21 19:08:35,755 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-21 19:08:35,755 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 442 transitions, 6482 flow [2024-06-21 19:08:35,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:35,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:35,755 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 19:08:35,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 19:08:35,756 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 19:08:35,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:35,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1753118934, now seen corresponding path program 4 times [2024-06-21 19:08:35,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:35,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371877446] [2024-06-21 19:08:35,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:35,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:08:36,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:36,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371877446] [2024-06-21 19:08:36,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371877446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:36,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:36,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:08:36,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638825160] [2024-06-21 19:08:36,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:36,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:08:36,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:36,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:08:36,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:08:36,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:08:36,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 442 transitions, 6482 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:36,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:36,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:08:36,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:38,351 INFO L124 PetriNetUnfolderBase]: 5182/8346 cut-off events. [2024-06-21 19:08:38,351 INFO L125 PetriNetUnfolderBase]: For 610876/610876 co-relation queries the response was YES. [2024-06-21 19:08:38,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63442 conditions, 8346 events. 5182/8346 cut-off events. For 610876/610876 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 55195 event pairs, 1704 based on Foata normal form. 1/8329 useless extension candidates. Maximal degree in co-relation 63305. Up to 7758 conditions per place. [2024-06-21 19:08:38,454 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 359 selfloop transitions, 85 changer transitions 0/462 dead transitions. [2024-06-21 19:08:38,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 462 transitions, 7695 flow [2024-06-21 19:08:38,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:08:38,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:08:38,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 19:08:38,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 19:08:38,455 INFO L175 Difference]: Start difference. First operand has 275 places, 442 transitions, 6482 flow. Second operand 8 states and 135 transitions. [2024-06-21 19:08:38,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 462 transitions, 7695 flow [2024-06-21 19:08:39,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 462 transitions, 7434 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 19:08:39,969 INFO L231 Difference]: Finished difference. Result has 277 places, 449 transitions, 6580 flow [2024-06-21 19:08:39,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6221, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6580, PETRI_PLACES=277, PETRI_TRANSITIONS=449} [2024-06-21 19:08:39,969 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-21 19:08:39,969 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 449 transitions, 6580 flow [2024-06-21 19:08:39,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:39,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:39,969 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 19:08:39,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 19:08:39,970 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 19:08:39,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:39,970 INFO L85 PathProgramCache]: Analyzing trace with hash 338372608, now seen corresponding path program 5 times [2024-06-21 19:08:39,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:39,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468610757] [2024-06-21 19:08:39,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:39,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:40,925 INFO 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 19:08:40,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:40,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468610757] [2024-06-21 19:08:40,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468610757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:40,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:40,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:08:40,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59384042] [2024-06-21 19:08:40,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:40,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:08:40,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:40,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:08:40,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:08:40,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:08:40,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 449 transitions, 6580 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:40,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:40,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:08:40,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:42,546 INFO L124 PetriNetUnfolderBase]: 5184/8359 cut-off events. [2024-06-21 19:08:42,546 INFO L125 PetriNetUnfolderBase]: For 626626/626632 co-relation queries the response was YES. [2024-06-21 19:08:42,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63670 conditions, 8359 events. 5184/8359 cut-off events. For 626626/626632 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 55533 event pairs, 1732 based on Foata normal form. 6/8343 useless extension candidates. Maximal degree in co-relation 63531. Up to 7627 conditions per place. [2024-06-21 19:08:42,650 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 327 selfloop transitions, 118 changer transitions 0/463 dead transitions. [2024-06-21 19:08:42,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 463 transitions, 7854 flow [2024-06-21 19:08:42,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:08:42,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:08:42,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 19:08:42,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:08:42,651 INFO L175 Difference]: Start difference. First operand has 277 places, 449 transitions, 6580 flow. Second operand 7 states and 126 transitions. [2024-06-21 19:08:42,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 463 transitions, 7854 flow [2024-06-21 19:08:44,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 463 transitions, 7670 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 19:08:44,210 INFO L231 Difference]: Finished difference. Result has 279 places, 452 transitions, 6704 flow [2024-06-21 19:08:44,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6396, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6704, PETRI_PLACES=279, PETRI_TRANSITIONS=452} [2024-06-21 19:08:44,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-21 19:08:44,211 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 452 transitions, 6704 flow [2024-06-21 19:08:44,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:44,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:44,211 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 19:08:44,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 19:08:44,211 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 19:08:44,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:44,212 INFO L85 PathProgramCache]: Analyzing trace with hash -621824282, now seen corresponding path program 6 times [2024-06-21 19:08:44,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:44,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866612632] [2024-06-21 19:08:44,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:44,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:45,191 INFO 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 19:08:45,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:45,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866612632] [2024-06-21 19:08:45,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866612632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:45,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:45,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:08:45,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025016656] [2024-06-21 19:08:45,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:45,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:08:45,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:45,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:08:45,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:08:45,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:08:45,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 452 transitions, 6704 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:45,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:45,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:08:45,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:46,812 INFO L124 PetriNetUnfolderBase]: 5179/8349 cut-off events. [2024-06-21 19:08:46,812 INFO L125 PetriNetUnfolderBase]: For 636595/636601 co-relation queries the response was YES. [2024-06-21 19:08:46,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63828 conditions, 8349 events. 5179/8349 cut-off events. For 636595/636601 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 55410 event pairs, 1731 based on Foata normal form. 5/8332 useless extension candidates. Maximal degree in co-relation 63688. Up to 7622 conditions per place. [2024-06-21 19:08:46,941 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 312 selfloop transitions, 133 changer transitions 0/463 dead transitions. [2024-06-21 19:08:46,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 463 transitions, 7920 flow [2024-06-21 19:08:46,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:08:46,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:08:46,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 19:08:46,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 19:08:46,942 INFO L175 Difference]: Start difference. First operand has 279 places, 452 transitions, 6704 flow. Second operand 7 states and 125 transitions. [2024-06-21 19:08:46,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 463 transitions, 7920 flow [2024-06-21 19:08:48,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 463 transitions, 7620 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-21 19:08:48,638 INFO L231 Difference]: Finished difference. Result has 282 places, 452 transitions, 6676 flow [2024-06-21 19:08:48,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6404, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6676, PETRI_PLACES=282, PETRI_TRANSITIONS=452} [2024-06-21 19:08:48,638 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-21 19:08:48,638 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 452 transitions, 6676 flow [2024-06-21 19:08:48,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:48,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:48,638 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 19:08:48,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 19:08:48,639 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 19:08:48,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:48,639 INFO L85 PathProgramCache]: Analyzing trace with hash 338380544, now seen corresponding path program 2 times [2024-06-21 19:08:48,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:48,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857554752] [2024-06-21 19:08:48,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:48,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:49,766 INFO 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 19:08:49,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:49,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857554752] [2024-06-21 19:08:49,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857554752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:49,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:49,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:08:49,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857343097] [2024-06-21 19:08:49,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:49,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:08:49,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:49,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:08:49,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:08:49,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:08:49,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 452 transitions, 6676 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:49,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:49,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:08:49,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:51,445 INFO L124 PetriNetUnfolderBase]: 5265/8440 cut-off events. [2024-06-21 19:08:51,445 INFO L125 PetriNetUnfolderBase]: For 651978/651984 co-relation queries the response was YES. [2024-06-21 19:08:51,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64579 conditions, 8440 events. 5265/8440 cut-off events. For 651978/651984 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 55574 event pairs, 1998 based on Foata normal form. 5/8438 useless extension candidates. Maximal degree in co-relation 64438. Up to 8104 conditions per place. [2024-06-21 19:08:51,562 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 417 selfloop transitions, 54 changer transitions 0/475 dead transitions. [2024-06-21 19:08:51,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 475 transitions, 8186 flow [2024-06-21 19:08:51,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:08:51,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:08:51,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 19:08:51,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 19:08:51,563 INFO L175 Difference]: Start difference. First operand has 282 places, 452 transitions, 6676 flow. Second operand 8 states and 128 transitions. [2024-06-21 19:08:51,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 475 transitions, 8186 flow [2024-06-21 19:08:53,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 475 transitions, 7874 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 19:08:53,487 INFO L231 Difference]: Finished difference. Result has 284 places, 463 transitions, 6752 flow [2024-06-21 19:08:53,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6364, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6752, PETRI_PLACES=284, PETRI_TRANSITIONS=463} [2024-06-21 19:08:53,487 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-21 19:08:53,487 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 463 transitions, 6752 flow [2024-06-21 19:08:53,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:53,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:53,487 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 19:08:53,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 19:08:53,488 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 19:08:53,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:53,488 INFO L85 PathProgramCache]: Analyzing trace with hash -627530669, now seen corresponding path program 4 times [2024-06-21 19:08:53,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:53,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233855888] [2024-06-21 19:08:53,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:53,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:08:54,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:54,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233855888] [2024-06-21 19:08:54,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233855888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:54,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:54,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:08:54,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073615170] [2024-06-21 19:08:54,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:54,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:08:54,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:54,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:08:54,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:08:54,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:08:54,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 463 transitions, 6752 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:54,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:54,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:08:54,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:56,527 INFO L124 PetriNetUnfolderBase]: 5325/8530 cut-off events. [2024-06-21 19:08:56,527 INFO L125 PetriNetUnfolderBase]: For 689591/689597 co-relation queries the response was YES. [2024-06-21 19:08:56,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66079 conditions, 8530 events. 5325/8530 cut-off events. For 689591/689597 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 56198 event pairs, 1766 based on Foata normal form. 6/8514 useless extension candidates. Maximal degree in co-relation 65937. Up to 7723 conditions per place. [2024-06-21 19:08:56,627 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 356 selfloop transitions, 135 changer transitions 0/495 dead transitions. [2024-06-21 19:08:56,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 495 transitions, 8728 flow [2024-06-21 19:08:56,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:08:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:08:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 19:08:56,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 19:08:56,628 INFO L175 Difference]: Start difference. First operand has 284 places, 463 transitions, 6752 flow. Second operand 9 states and 145 transitions. [2024-06-21 19:08:56,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 495 transitions, 8728 flow [2024-06-21 19:08:58,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 495 transitions, 8621 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-21 19:08:58,924 INFO L231 Difference]: Finished difference. Result has 291 places, 477 transitions, 7253 flow [2024-06-21 19:08:58,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6645, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7253, PETRI_PLACES=291, PETRI_TRANSITIONS=477} [2024-06-21 19:08:58,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-21 19:08:58,925 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 477 transitions, 7253 flow [2024-06-21 19:08:58,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:58,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:58,925 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 19:08:58,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 19:08:58,925 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 19:08:58,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:58,925 INFO L85 PathProgramCache]: Analyzing trace with hash 338755334, now seen corresponding path program 3 times [2024-06-21 19:08:58,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:58,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744241149] [2024-06-21 19:08:58,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:58,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:09:00,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:00,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744241149] [2024-06-21 19:09:00,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744241149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:00,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:00,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:09:00,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790486406] [2024-06-21 19:09:00,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:00,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:09:00,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:00,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:09:00,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:09:00,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:09:00,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 477 transitions, 7253 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:00,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:00,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:09:00,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:02,007 INFO L124 PetriNetUnfolderBase]: 5330/8537 cut-off events. [2024-06-21 19:09:02,007 INFO L125 PetriNetUnfolderBase]: For 710774/710780 co-relation queries the response was YES. [2024-06-21 19:09:02,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67519 conditions, 8537 events. 5330/8537 cut-off events. For 710774/710780 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 56328 event pairs, 2001 based on Foata normal form. 5/8535 useless extension candidates. Maximal degree in co-relation 67374. Up to 8193 conditions per place. [2024-06-21 19:09:02,114 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 428 selfloop transitions, 60 changer transitions 0/492 dead transitions. [2024-06-21 19:09:02,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 492 transitions, 8641 flow [2024-06-21 19:09:02,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:09:02,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:09:02,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 19:09:02,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-21 19:09:02,115 INFO L175 Difference]: Start difference. First operand has 291 places, 477 transitions, 7253 flow. Second operand 8 states and 127 transitions. [2024-06-21 19:09:02,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 492 transitions, 8641 flow [2024-06-21 19:09:04,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 492 transitions, 8458 flow, removed 67 selfloop flow, removed 3 redundant places. [2024-06-21 19:09:04,176 INFO L231 Difference]: Finished difference. Result has 296 places, 480 transitions, 7268 flow [2024-06-21 19:09:04,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7070, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7268, PETRI_PLACES=296, PETRI_TRANSITIONS=480} [2024-06-21 19:09:04,177 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-21 19:09:04,177 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 480 transitions, 7268 flow [2024-06-21 19:09:04,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:04,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:04,177 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 19:09:04,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 19:09:04,178 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 19:09:04,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:04,178 INFO L85 PathProgramCache]: Analyzing trace with hash -614643659, now seen corresponding path program 5 times [2024-06-21 19:09:04,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:04,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238751119] [2024-06-21 19:09:04,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:04,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:05,288 INFO 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 19:09:05,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:05,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238751119] [2024-06-21 19:09:05,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238751119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:05,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:05,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:09:05,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340411148] [2024-06-21 19:09:05,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:05,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:09:05,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:05,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:09:05,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:09:05,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:09:05,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 480 transitions, 7268 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:05,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:05,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:09:05,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:07,242 INFO L124 PetriNetUnfolderBase]: 5334/8544 cut-off events. [2024-06-21 19:09:07,242 INFO L125 PetriNetUnfolderBase]: For 724561/724567 co-relation queries the response was YES. [2024-06-21 19:09:07,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67593 conditions, 8544 events. 5334/8544 cut-off events. For 724561/724567 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 56349 event pairs, 1755 based on Foata normal form. 6/8528 useless extension candidates. Maximal degree in co-relation 67446. Up to 7737 conditions per place. [2024-06-21 19:09:07,396 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 338 selfloop transitions, 158 changer transitions 0/500 dead transitions. [2024-06-21 19:09:07,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 500 transitions, 8976 flow [2024-06-21 19:09:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:09:07,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:09:07,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 19:09:07,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:09:07,397 INFO L175 Difference]: Start difference. First operand has 296 places, 480 transitions, 7268 flow. Second operand 8 states and 136 transitions. [2024-06-21 19:09:07,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 500 transitions, 8976 flow [2024-06-21 19:09:09,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 500 transitions, 8806 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 19:09:09,514 INFO L231 Difference]: Finished difference. Result has 300 places, 485 transitions, 7571 flow [2024-06-21 19:09:09,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7098, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7571, PETRI_PLACES=300, PETRI_TRANSITIONS=485} [2024-06-21 19:09:09,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-21 19:09:09,515 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 485 transitions, 7571 flow [2024-06-21 19:09:09,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:09,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:09,515 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 19:09:09,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 19:09:09,515 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 19:09:09,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:09,515 INFO L85 PathProgramCache]: Analyzing trace with hash -627541829, now seen corresponding path program 6 times [2024-06-21 19:09:09,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:09,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031811126] [2024-06-21 19:09:09,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:09,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:10,663 INFO 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 19:09:10,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:10,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031811126] [2024-06-21 19:09:10,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031811126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:10,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:10,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:09:10,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596995276] [2024-06-21 19:09:10,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:10,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:09:10,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:10,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:09:10,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:09:10,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:09:10,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 485 transitions, 7571 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:10,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:10,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:09:10,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:12,535 INFO L124 PetriNetUnfolderBase]: 5336/8547 cut-off events. [2024-06-21 19:09:12,535 INFO L125 PetriNetUnfolderBase]: For 741555/741561 co-relation queries the response was YES. [2024-06-21 19:09:12,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68338 conditions, 8547 events. 5336/8547 cut-off events. For 741555/741561 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 56322 event pairs, 1765 based on Foata normal form. 6/8531 useless extension candidates. Maximal degree in co-relation 68189. Up to 7741 conditions per place. [2024-06-21 19:09:12,664 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 353 selfloop transitions, 146 changer transitions 0/503 dead transitions. [2024-06-21 19:09:12,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 503 transitions, 9108 flow [2024-06-21 19:09:12,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:09:12,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:09:12,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 19:09:12,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 19:09:12,665 INFO L175 Difference]: Start difference. First operand has 300 places, 485 transitions, 7571 flow. Second operand 9 states and 144 transitions. [2024-06-21 19:09:12,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 503 transitions, 9108 flow [2024-06-21 19:09:14,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 503 transitions, 8731 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-21 19:09:14,334 INFO L231 Difference]: Finished difference. Result has 304 places, 489 transitions, 7602 flow [2024-06-21 19:09:14,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7197, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7602, PETRI_PLACES=304, PETRI_TRANSITIONS=489} [2024-06-21 19:09:14,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-21 19:09:14,335 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 489 transitions, 7602 flow [2024-06-21 19:09:14,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:14,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:14,335 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 19:09:14,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 19:09:14,335 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 19:09:14,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:14,336 INFO L85 PathProgramCache]: Analyzing trace with hash -229674310, now seen corresponding path program 4 times [2024-06-21 19:09:14,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:14,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136137443] [2024-06-21 19:09:14,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:14,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:15,529 INFO 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 19:09:15,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:15,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136137443] [2024-06-21 19:09:15,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136137443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:15,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:15,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:09:15,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479239144] [2024-06-21 19:09:15,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:15,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:09:15,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:15,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:09:15,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:09:15,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:09:15,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 489 transitions, 7602 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:15,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:15,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:09:15,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:17,356 INFO L124 PetriNetUnfolderBase]: 5333/8543 cut-off events. [2024-06-21 19:09:17,356 INFO L125 PetriNetUnfolderBase]: For 753373/753379 co-relation queries the response was YES. [2024-06-21 19:09:17,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68370 conditions, 8543 events. 5333/8543 cut-off events. For 753373/753379 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 56368 event pairs, 2000 based on Foata normal form. 5/8541 useless extension candidates. Maximal degree in co-relation 68220. Up to 8199 conditions per place. [2024-06-21 19:09:17,474 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 432 selfloop transitions, 64 changer transitions 0/500 dead transitions. [2024-06-21 19:09:17,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 500 transitions, 8784 flow [2024-06-21 19:09:17,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:09:17,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:09:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-21 19:09:17,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-21 19:09:17,475 INFO L175 Difference]: Start difference. First operand has 304 places, 489 transitions, 7602 flow. Second operand 9 states and 133 transitions. [2024-06-21 19:09:17,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 500 transitions, 8784 flow [2024-06-21 19:09:20,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 500 transitions, 8388 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-21 19:09:20,058 INFO L231 Difference]: Finished difference. Result has 307 places, 489 transitions, 7340 flow [2024-06-21 19:09:20,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7206, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7340, PETRI_PLACES=307, PETRI_TRANSITIONS=489} [2024-06-21 19:09:20,058 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-21 19:09:20,058 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 489 transitions, 7340 flow [2024-06-21 19:09:20,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:20,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:20,059 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 19:09:20,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 19:09:20,059 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 19:09:20,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:20,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1605555894, now seen corresponding path program 7 times [2024-06-21 19:09:20,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:20,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531395433] [2024-06-21 19:09:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:20,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:20,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:20,823 INFO 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 19:09:20,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:20,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531395433] [2024-06-21 19:09:20,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531395433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:20,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:20,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:09:20,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366452743] [2024-06-21 19:09:20,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:20,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:09:20,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:20,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:09:20,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:09:20,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:09:20,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 489 transitions, 7340 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:20,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:20,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:09:20,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:22,699 INFO L124 PetriNetUnfolderBase]: 5262/8467 cut-off events. [2024-06-21 19:09:22,699 INFO L125 PetriNetUnfolderBase]: For 766454/766460 co-relation queries the response was YES. [2024-06-21 19:09:22,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67600 conditions, 8467 events. 5262/8467 cut-off events. For 766454/766460 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 56142 event pairs, 1697 based on Foata normal form. 6/8469 useless extension candidates. Maximal degree in co-relation 67449. Up to 7869 conditions per place. [2024-06-21 19:09:22,827 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 424 selfloop transitions, 66 changer transitions 0/514 dead transitions. [2024-06-21 19:09:22,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 514 transitions, 8444 flow [2024-06-21 19:09:22,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:09:22,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:09:22,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 19:09:22,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-21 19:09:22,828 INFO L175 Difference]: Start difference. First operand has 307 places, 489 transitions, 7340 flow. Second operand 7 states and 136 transitions. [2024-06-21 19:09:22,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 514 transitions, 8444 flow [2024-06-21 19:09:24,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 514 transitions, 8272 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 19:09:24,979 INFO L231 Difference]: Finished difference. Result has 307 places, 493 transitions, 7376 flow [2024-06-21 19:09:24,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7168, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7376, PETRI_PLACES=307, PETRI_TRANSITIONS=493} [2024-06-21 19:09:24,980 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-21 19:09:24,980 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 493 transitions, 7376 flow [2024-06-21 19:09:24,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:24,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:24,980 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 19:09:24,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 19:09:24,980 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 19:09:24,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:24,981 INFO L85 PathProgramCache]: Analyzing trace with hash 322817843, now seen corresponding path program 7 times [2024-06-21 19:09:24,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:24,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791260994] [2024-06-21 19:09:24,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:24,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:25,894 INFO 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 19:09:25,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:25,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791260994] [2024-06-21 19:09:25,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791260994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:25,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:25,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:09:25,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039061594] [2024-06-21 19:09:25,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:25,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:09:25,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:25,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:09:25,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:09:25,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:09:25,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 493 transitions, 7376 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:25,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:25,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:09:25,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:27,921 INFO L124 PetriNetUnfolderBase]: 5357/8578 cut-off events. [2024-06-21 19:09:27,921 INFO L125 PetriNetUnfolderBase]: For 783723/783731 co-relation queries the response was YES. [2024-06-21 19:09:28,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68454 conditions, 8578 events. 5357/8578 cut-off events. For 783723/783731 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 56616 event pairs, 1768 based on Foata normal form. 8/8582 useless extension candidates. Maximal degree in co-relation 68303. Up to 8099 conditions per place. [2024-06-21 19:09:28,044 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 438 selfloop transitions, 83 changer transitions 0/525 dead transitions. [2024-06-21 19:09:28,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 525 transitions, 8638 flow [2024-06-21 19:09:28,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:09:28,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:09:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 19:09:28,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:09:28,045 INFO L175 Difference]: Start difference. First operand has 307 places, 493 transitions, 7376 flow. Second operand 9 states and 153 transitions. [2024-06-21 19:09:28,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 525 transitions, 8638 flow [2024-06-21 19:09:30,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 525 transitions, 8480 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 19:09:30,246 INFO L231 Difference]: Finished difference. Result has 310 places, 501 transitions, 7557 flow [2024-06-21 19:09:30,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7218, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7557, PETRI_PLACES=310, PETRI_TRANSITIONS=501} [2024-06-21 19:09:30,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-21 19:09:30,247 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 501 transitions, 7557 flow [2024-06-21 19:09:30,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:30,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:30,247 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 19:09:30,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 19:09:30,247 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 19:09:30,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:30,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1642499392, now seen corresponding path program 8 times [2024-06-21 19:09:30,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:30,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979110482] [2024-06-21 19:09:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:30,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:31,101 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 19:09:31,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:31,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979110482] [2024-06-21 19:09:31,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979110482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:31,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:31,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:09:31,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325251605] [2024-06-21 19:09:31,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:31,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:09:31,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:31,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:09:31,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:09:31,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:09:31,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 501 transitions, 7557 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:31,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:31,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:09:31,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:32,969 INFO L124 PetriNetUnfolderBase]: 5274/8487 cut-off events. [2024-06-21 19:09:32,970 INFO L125 PetriNetUnfolderBase]: For 798657/798663 co-relation queries the response was YES. [2024-06-21 19:09:33,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68205 conditions, 8487 events. 5274/8487 cut-off events. For 798657/798663 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 56292 event pairs, 1709 based on Foata normal form. 6/8489 useless extension candidates. Maximal degree in co-relation 68052. Up to 7794 conditions per place. [2024-06-21 19:09:33,094 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 393 selfloop transitions, 100 changer transitions 0/519 dead transitions. [2024-06-21 19:09:33,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 519 transitions, 8599 flow [2024-06-21 19:09:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:09:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:09:33,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 19:09:33,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 19:09:33,095 INFO L175 Difference]: Start difference. First operand has 310 places, 501 transitions, 7557 flow. Second operand 8 states and 143 transitions. [2024-06-21 19:09:33,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 519 transitions, 8599 flow [2024-06-21 19:09:35,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 519 transitions, 8320 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-21 19:09:35,459 INFO L231 Difference]: Finished difference. Result has 311 places, 501 transitions, 7497 flow [2024-06-21 19:09:35,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7278, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7497, PETRI_PLACES=311, PETRI_TRANSITIONS=501} [2024-06-21 19:09:35,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-21 19:09:35,459 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 501 transitions, 7497 flow [2024-06-21 19:09:35,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:35,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:35,459 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 19:09:35,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 19:09:35,460 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 19:09:35,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:35,460 INFO L85 PathProgramCache]: Analyzing trace with hash -414596701, now seen corresponding path program 8 times [2024-06-21 19:09:35,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:35,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853253879] [2024-06-21 19:09:35,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:35,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:36,402 INFO 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 19:09:36,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:36,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853253879] [2024-06-21 19:09:36,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853253879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:36,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:36,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:09:36,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218880442] [2024-06-21 19:09:36,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:36,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:09:36,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:36,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:09:36,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:09:36,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:09:36,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 501 transitions, 7497 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:36,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:36,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:09:36,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:38,490 INFO L124 PetriNetUnfolderBase]: 5374/8603 cut-off events. [2024-06-21 19:09:38,490 INFO L125 PetriNetUnfolderBase]: For 812073/812081 co-relation queries the response was YES. [2024-06-21 19:09:38,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68951 conditions, 8603 events. 5374/8603 cut-off events. For 812073/812081 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 56722 event pairs, 1732 based on Foata normal form. 8/8607 useless extension candidates. Maximal degree in co-relation 68797. Up to 8116 conditions per place. [2024-06-21 19:09:38,624 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 447 selfloop transitions, 83 changer transitions 0/534 dead transitions. [2024-06-21 19:09:38,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 534 transitions, 8815 flow [2024-06-21 19:09:38,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:09:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:09:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 19:09:38,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 19:09:38,625 INFO L175 Difference]: Start difference. First operand has 311 places, 501 transitions, 7497 flow. Second operand 9 states and 152 transitions. [2024-06-21 19:09:38,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 534 transitions, 8815 flow [2024-06-21 19:09:41,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 534 transitions, 8653 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 19:09:41,296 INFO L231 Difference]: Finished difference. Result has 314 places, 512 transitions, 7730 flow [2024-06-21 19:09:41,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7335, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7730, PETRI_PLACES=314, PETRI_TRANSITIONS=512} [2024-06-21 19:09:41,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-21 19:09:41,296 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 512 transitions, 7730 flow [2024-06-21 19:09:41,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:41,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:41,297 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 19:09:41,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 19:09:41,297 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 19:09:41,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:41,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1642507328, now seen corresponding path program 5 times [2024-06-21 19:09:41,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:41,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686338925] [2024-06-21 19:09:41,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:41,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:42,336 INFO 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 19:09:42,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:42,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686338925] [2024-06-21 19:09:42,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686338925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:42,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:42,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:09:42,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459433941] [2024-06-21 19:09:42,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:42,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:09:42,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:42,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:09:42,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:09:42,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:09:42,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 512 transitions, 7730 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:42,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:42,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:09:42,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:44,273 INFO L124 PetriNetUnfolderBase]: 5376/8606 cut-off events. [2024-06-21 19:09:44,273 INFO L125 PetriNetUnfolderBase]: For 824266/824268 co-relation queries the response was YES. [2024-06-21 19:09:44,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69211 conditions, 8606 events. 5376/8606 cut-off events. For 824266/824268 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 56860 event pairs, 2135 based on Foata normal form. 3/8606 useless extension candidates. Maximal degree in co-relation 69056. Up to 8296 conditions per place. [2024-06-21 19:09:44,408 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 496 selfloop transitions, 35 changer transitions 0/535 dead transitions. [2024-06-21 19:09:44,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 535 transitions, 8886 flow [2024-06-21 19:09:44,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:09:44,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:09:44,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 19:09:44,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 19:09:44,409 INFO L175 Difference]: Start difference. First operand has 314 places, 512 transitions, 7730 flow. Second operand 8 states and 132 transitions. [2024-06-21 19:09:44,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 535 transitions, 8886 flow [2024-06-21 19:09:47,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 535 transitions, 8651 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 19:09:47,366 INFO L231 Difference]: Finished difference. Result has 316 places, 516 transitions, 7619 flow [2024-06-21 19:09:47,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7495, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7619, PETRI_PLACES=316, PETRI_TRANSITIONS=516} [2024-06-21 19:09:47,367 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-21 19:09:47,367 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 516 transitions, 7619 flow [2024-06-21 19:09:47,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:47,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:47,368 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 19:09:47,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 19:09:47,368 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 19:09:47,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:47,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1848997101, now seen corresponding path program 9 times [2024-06-21 19:09:47,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:47,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098419648] [2024-06-21 19:09:47,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:47,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:48,444 INFO 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 19:09:48,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:48,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098419648] [2024-06-21 19:09:48,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098419648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:48,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:48,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:09:48,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495807147] [2024-06-21 19:09:48,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:48,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:09:48,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:48,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:09:48,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:09:48,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:09:48,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 516 transitions, 7619 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:48,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:48,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:09:48,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:50,443 INFO L124 PetriNetUnfolderBase]: 5426/8679 cut-off events. [2024-06-21 19:09:50,443 INFO L125 PetriNetUnfolderBase]: For 852144/852150 co-relation queries the response was YES. [2024-06-21 19:09:50,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69850 conditions, 8679 events. 5426/8679 cut-off events. For 852144/852150 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 57247 event pairs, 1743 based on Foata normal form. 6/8681 useless extension candidates. Maximal degree in co-relation 69695. Up to 8017 conditions per place. [2024-06-21 19:09:50,581 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 425 selfloop transitions, 125 changer transitions 0/554 dead transitions. [2024-06-21 19:09:50,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 554 transitions, 9308 flow [2024-06-21 19:09:50,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:09:50,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:09:50,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 19:09:50,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 19:09:50,582 INFO L175 Difference]: Start difference. First operand has 316 places, 516 transitions, 7619 flow. Second operand 8 states and 143 transitions. [2024-06-21 19:09:50,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 554 transitions, 9308 flow [2024-06-21 19:09:53,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 554 transitions, 9244 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 19:09:53,641 INFO L231 Difference]: Finished difference. Result has 319 places, 532 transitions, 8188 flow [2024-06-21 19:09:53,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7555, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8188, PETRI_PLACES=319, PETRI_TRANSITIONS=532} [2024-06-21 19:09:53,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-21 19:09:53,642 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 532 transitions, 8188 flow [2024-06-21 19:09:53,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:53,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:53,642 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 19:09:53,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 19:09:53,643 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 19:09:53,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:53,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1642495765, now seen corresponding path program 10 times [2024-06-21 19:09:53,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:53,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043674194] [2024-06-21 19:09:53,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:53,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:54,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:09:54,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:54,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043674194] [2024-06-21 19:09:54,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043674194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:54,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:54,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:09:54,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432326325] [2024-06-21 19:09:54,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:54,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:09:54,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:54,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:09:54,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:09:54,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:09:54,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 532 transitions, 8188 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:54,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:54,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:09:54,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:56,535 INFO L124 PetriNetUnfolderBase]: 5428/8683 cut-off events. [2024-06-21 19:09:56,535 INFO L125 PetriNetUnfolderBase]: For 872573/872579 co-relation queries the response was YES. [2024-06-21 19:09:56,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70742 conditions, 8683 events. 5428/8683 cut-off events. For 872573/872579 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 57266 event pairs, 1743 based on Foata normal form. 6/8685 useless extension candidates. Maximal degree in co-relation 70585. Up to 8021 conditions per place. [2024-06-21 19:09:56,661 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 425 selfloop transitions, 128 changer transitions 0/557 dead transitions. [2024-06-21 19:09:56,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 557 transitions, 9668 flow [2024-06-21 19:09:56,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:09:56,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:09:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 19:09:56,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 19:09:56,662 INFO L175 Difference]: Start difference. First operand has 319 places, 532 transitions, 8188 flow. Second operand 9 states and 152 transitions. [2024-06-21 19:09:56,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 557 transitions, 9668 flow [2024-06-21 19:09:59,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 557 transitions, 9145 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-21 19:09:59,370 INFO L231 Difference]: Finished difference. Result has 321 places, 537 transitions, 8077 flow [2024-06-21 19:09:59,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7678, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8077, PETRI_PLACES=321, PETRI_TRANSITIONS=537} [2024-06-21 19:09:59,371 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-21 19:09:59,371 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 537 transitions, 8077 flow [2024-06-21 19:09:59,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:59,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:59,371 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 19:09:59,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 19:09:59,371 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 19:09:59,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:59,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1024863142, now seen corresponding path program 1 times [2024-06-21 19:09:59,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:59,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821203351] [2024-06-21 19:09:59,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:59,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:00,497 INFO 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 19:10:00,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:00,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821203351] [2024-06-21 19:10:00,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821203351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:00,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:00,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:00,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123671820] [2024-06-21 19:10:00,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:00,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:00,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:00,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:00,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:00,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:10:00,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 537 transitions, 8077 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:00,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:00,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:10:00,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:02,488 INFO L124 PetriNetUnfolderBase]: 5250/8508 cut-off events. [2024-06-21 19:10:02,488 INFO L125 PetriNetUnfolderBase]: For 890483/890483 co-relation queries the response was YES. [2024-06-21 19:10:02,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69607 conditions, 8508 events. 5250/8508 cut-off events. For 890483/890483 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 57214 event pairs, 2307 based on Foata normal form. 2/8507 useless extension candidates. Maximal degree in co-relation 69448. Up to 7915 conditions per place. [2024-06-21 19:10:02,610 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 490 selfloop transitions, 23 changer transitions 0/555 dead transitions. [2024-06-21 19:10:02,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 555 transitions, 9211 flow [2024-06-21 19:10:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:02,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:02,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 19:10:02,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 19:10:02,611 INFO L175 Difference]: Start difference. First operand has 321 places, 537 transitions, 8077 flow. Second operand 8 states and 137 transitions. [2024-06-21 19:10:02,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 555 transitions, 9211 flow [2024-06-21 19:10:05,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 555 transitions, 8916 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-21 19:10:05,242 INFO L231 Difference]: Finished difference. Result has 323 places, 540 transitions, 7904 flow [2024-06-21 19:10:05,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7782, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7904, PETRI_PLACES=323, PETRI_TRANSITIONS=540} [2024-06-21 19:10:05,242 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-21 19:10:05,243 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 540 transitions, 7904 flow [2024-06-21 19:10:05,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:05,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:05,243 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 19:10:05,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 19:10:05,243 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 19:10:05,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:05,244 INFO L85 PathProgramCache]: Analyzing trace with hash -855734275, now seen corresponding path program 1 times [2024-06-21 19:10:05,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:05,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553720760] [2024-06-21 19:10:05,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:05,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:06,198 INFO 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 19:10:06,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:06,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553720760] [2024-06-21 19:10:06,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553720760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:06,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:06,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:06,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621287995] [2024-06-21 19:10:06,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:06,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:06,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:06,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:06,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:06,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:10:06,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 540 transitions, 7904 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:06,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:06,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:10:06,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:08,212 INFO L124 PetriNetUnfolderBase]: 5331/8591 cut-off events. [2024-06-21 19:10:08,212 INFO L125 PetriNetUnfolderBase]: For 899924/899924 co-relation queries the response was YES. [2024-06-21 19:10:08,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70366 conditions, 8591 events. 5331/8591 cut-off events. For 899924/899924 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 57314 event pairs, 2342 based on Foata normal form. 1/8589 useless extension candidates. Maximal degree in co-relation 70206. Up to 8184 conditions per place. [2024-06-21 19:10:08,533 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 525 selfloop transitions, 22 changer transitions 0/559 dead transitions. [2024-06-21 19:10:08,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 559 transitions, 9106 flow [2024-06-21 19:10:08,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:08,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:08,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 19:10:08,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 19:10:08,534 INFO L175 Difference]: Start difference. First operand has 323 places, 540 transitions, 7904 flow. Second operand 9 states and 142 transitions. [2024-06-21 19:10:08,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 559 transitions, 9106 flow [2024-06-21 19:10:11,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 559 transitions, 9012 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 19:10:11,443 INFO L231 Difference]: Finished difference. Result has 326 places, 543 transitions, 7922 flow [2024-06-21 19:10:11,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7812, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7922, PETRI_PLACES=326, PETRI_TRANSITIONS=543} [2024-06-21 19:10:11,444 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-21 19:10:11,444 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 543 transitions, 7922 flow [2024-06-21 19:10:11,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:11,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:11,444 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 19:10:11,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 19:10:11,444 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 19:10:11,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:11,445 INFO L85 PathProgramCache]: Analyzing trace with hash -852015360, now seen corresponding path program 2 times [2024-06-21 19:10:11,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:11,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910377157] [2024-06-21 19:10:11,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:11,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:12,681 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 19:10:12,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:12,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910377157] [2024-06-21 19:10:12,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910377157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:12,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:12,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:12,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483029897] [2024-06-21 19:10:12,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:12,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:12,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:12,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:12,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:12,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:10:12,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 543 transitions, 7922 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:12,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:12,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:10:12,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:14,687 INFO L124 PetriNetUnfolderBase]: 5270/8532 cut-off events. [2024-06-21 19:10:14,687 INFO L125 PetriNetUnfolderBase]: For 904321/904321 co-relation queries the response was YES. [2024-06-21 19:10:14,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70523 conditions, 8532 events. 5270/8532 cut-off events. For 904321/904321 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 57240 event pairs, 2272 based on Foata normal form. 1/8530 useless extension candidates. Maximal degree in co-relation 70362. Up to 7928 conditions per place. [2024-06-21 19:10:14,808 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 485 selfloop transitions, 30 changer transitions 0/558 dead transitions. [2024-06-21 19:10:14,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 558 transitions, 9052 flow [2024-06-21 19:10:14,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:10:14,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:10:14,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 19:10:14,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 19:10:14,809 INFO L175 Difference]: Start difference. First operand has 326 places, 543 transitions, 7922 flow. Second operand 7 states and 127 transitions. [2024-06-21 19:10:14,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 558 transitions, 9052 flow [2024-06-21 19:10:17,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 558 transitions, 8958 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 19:10:17,687 INFO L231 Difference]: Finished difference. Result has 326 places, 546 transitions, 7964 flow [2024-06-21 19:10:17,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7828, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7964, PETRI_PLACES=326, PETRI_TRANSITIONS=546} [2024-06-21 19:10:17,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-21 19:10:17,687 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 546 transitions, 7964 flow [2024-06-21 19:10:17,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:17,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:17,687 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 19:10:17,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 19:10:17,687 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 19:10:17,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:17,688 INFO L85 PathProgramCache]: Analyzing trace with hash -529312637, now seen corresponding path program 2 times [2024-06-21 19:10:17,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:17,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106787692] [2024-06-21 19:10:17,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:17,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:18,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:18,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:18,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106787692] [2024-06-21 19:10:18,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106787692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:18,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:18,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:18,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759245288] [2024-06-21 19:10:18,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:18,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:18,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:18,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:18,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:18,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:10:18,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 546 transitions, 7964 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:18,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:18,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:10:18,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:20,685 INFO L124 PetriNetUnfolderBase]: 5357/8627 cut-off events. [2024-06-21 19:10:20,685 INFO L125 PetriNetUnfolderBase]: For 929581/929581 co-relation queries the response was YES. [2024-06-21 19:10:20,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72062 conditions, 8627 events. 5357/8627 cut-off events. For 929581/929581 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 57495 event pairs, 2341 based on Foata normal form. 1/8625 useless extension candidates. Maximal degree in co-relation 71901. Up to 8197 conditions per place. [2024-06-21 19:10:20,811 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 520 selfloop transitions, 38 changer transitions 0/570 dead transitions. [2024-06-21 19:10:20,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 570 transitions, 9672 flow [2024-06-21 19:10:20,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:20,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:20,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 19:10:20,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 19:10:20,812 INFO L175 Difference]: Start difference. First operand has 326 places, 546 transitions, 7964 flow. Second operand 8 states and 137 transitions. [2024-06-21 19:10:20,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 570 transitions, 9672 flow [2024-06-21 19:10:24,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 570 transitions, 9566 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 19:10:24,208 INFO L231 Difference]: Finished difference. Result has 330 places, 555 transitions, 8154 flow [2024-06-21 19:10:24,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7858, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8154, PETRI_PLACES=330, PETRI_TRANSITIONS=555} [2024-06-21 19:10:24,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-21 19:10:24,209 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 555 transitions, 8154 flow [2024-06-21 19:10:24,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:24,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:24,209 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 19:10:24,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 19:10:24,209 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 19:10:24,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:24,209 INFO L85 PathProgramCache]: Analyzing trace with hash -529306840, now seen corresponding path program 1 times [2024-06-21 19:10:24,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:24,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210014143] [2024-06-21 19:10:24,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:24,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:25,249 INFO 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 19:10:25,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:25,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210014143] [2024-06-21 19:10:25,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210014143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:25,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:25,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:25,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283092354] [2024-06-21 19:10:25,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:25,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:25,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:25,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:25,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:25,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:10:25,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 555 transitions, 8154 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:25,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:25,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:10:25,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:27,272 INFO L124 PetriNetUnfolderBase]: 5466/8738 cut-off events. [2024-06-21 19:10:27,272 INFO L125 PetriNetUnfolderBase]: For 953689/953689 co-relation queries the response was YES. [2024-06-21 19:10:27,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74187 conditions, 8738 events. 5466/8738 cut-off events. For 953689/953689 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 57742 event pairs, 2375 based on Foata normal form. 1/8736 useless extension candidates. Maximal degree in co-relation 74024. Up to 8444 conditions per place. [2024-06-21 19:10:27,401 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 548 selfloop transitions, 19 changer transitions 0/571 dead transitions. [2024-06-21 19:10:27,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 571 transitions, 9398 flow [2024-06-21 19:10:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:27,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:27,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-21 19:10:27,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439153439153439 [2024-06-21 19:10:27,402 INFO L175 Difference]: Start difference. First operand has 330 places, 555 transitions, 8154 flow. Second operand 9 states and 130 transitions. [2024-06-21 19:10:27,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 571 transitions, 9398 flow [2024-06-21 19:10:30,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 571 transitions, 9292 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 19:10:30,014 INFO L231 Difference]: Finished difference. Result has 335 places, 558 transitions, 8168 flow [2024-06-21 19:10:30,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8048, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8168, PETRI_PLACES=335, PETRI_TRANSITIONS=558} [2024-06-21 19:10:30,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-21 19:10:30,014 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 558 transitions, 8168 flow [2024-06-21 19:10:30,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:30,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:30,015 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 19:10:30,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 19:10:30,015 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 19:10:30,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:30,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1753132605, now seen corresponding path program 3 times [2024-06-21 19:10:30,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:30,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182355855] [2024-06-21 19:10:30,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:30,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:31,062 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 19:10:31,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:31,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182355855] [2024-06-21 19:10:31,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182355855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:31,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:31,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:31,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798341768] [2024-06-21 19:10:31,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:31,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:31,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:31,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:31,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:31,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:10:31,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 558 transitions, 8168 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:31,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:31,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:10:31,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:33,043 INFO L124 PetriNetUnfolderBase]: 5379/8650 cut-off events. [2024-06-21 19:10:33,044 INFO L125 PetriNetUnfolderBase]: For 967649/967649 co-relation queries the response was YES. [2024-06-21 19:10:33,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73524 conditions, 8650 events. 5379/8650 cut-off events. For 967649/967649 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 57525 event pairs, 2340 based on Foata normal form. 1/8648 useless extension candidates. Maximal degree in co-relation 73360. Up to 8219 conditions per place. [2024-06-21 19:10:33,169 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 519 selfloop transitions, 40 changer transitions 0/572 dead transitions. [2024-06-21 19:10:33,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 572 transitions, 9512 flow [2024-06-21 19:10:33,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:33,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:33,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 19:10:33,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:10:33,171 INFO L175 Difference]: Start difference. First operand has 335 places, 558 transitions, 8168 flow. Second operand 8 states and 136 transitions. [2024-06-21 19:10:33,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 572 transitions, 9512 flow [2024-06-21 19:10:37,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 572 transitions, 9376 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-21 19:10:37,061 INFO L231 Difference]: Finished difference. Result has 336 places, 558 transitions, 8118 flow [2024-06-21 19:10:37,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8032, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8118, PETRI_PLACES=336, PETRI_TRANSITIONS=558} [2024-06-21 19:10:37,061 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-21 19:10:37,061 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 558 transitions, 8118 flow [2024-06-21 19:10:37,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:37,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:37,061 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 19:10:37,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 19:10:37,062 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 19:10:37,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:37,062 INFO L85 PathProgramCache]: Analyzing trace with hash -621810611, now seen corresponding path program 4 times [2024-06-21 19:10:37,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:37,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376753414] [2024-06-21 19:10:37,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:37,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:38,161 INFO 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 19:10:38,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:38,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376753414] [2024-06-21 19:10:38,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376753414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:38,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:38,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:38,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535732938] [2024-06-21 19:10:38,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:38,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:38,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:38,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:38,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:38,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:10:38,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 558 transitions, 8118 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:38,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:38,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:10:38,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:40,078 INFO L124 PetriNetUnfolderBase]: 5392/8669 cut-off events. [2024-06-21 19:10:40,078 INFO L125 PetriNetUnfolderBase]: For 991321/991327 co-relation queries the response was YES. [2024-06-21 19:10:40,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73972 conditions, 8669 events. 5392/8669 cut-off events. For 991321/991327 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 57674 event pairs, 2310 based on Foata normal form. 2/8667 useless extension candidates. Maximal degree in co-relation 73807. Up to 8208 conditions per place. [2024-06-21 19:10:40,209 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 509 selfloop transitions, 58 changer transitions 0/580 dead transitions. [2024-06-21 19:10:40,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 580 transitions, 10048 flow [2024-06-21 19:10:40,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:40,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:40,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 19:10:40,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 19:10:40,210 INFO L175 Difference]: Start difference. First operand has 336 places, 558 transitions, 8118 flow. Second operand 8 states and 139 transitions. [2024-06-21 19:10:40,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 580 transitions, 10048 flow [2024-06-21 19:10:43,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 580 transitions, 9970 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 19:10:43,761 INFO L231 Difference]: Finished difference. Result has 338 places, 567 transitions, 8372 flow [2024-06-21 19:10:43,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8040, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8372, PETRI_PLACES=338, PETRI_TRANSITIONS=567} [2024-06-21 19:10:43,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-21 19:10:43,762 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 567 transitions, 8372 flow [2024-06-21 19:10:43,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:43,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:43,762 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 19:10:43,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 19:10:43,762 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 19:10:43,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:43,763 INFO L85 PathProgramCache]: Analyzing trace with hash -621810394, now seen corresponding path program 2 times [2024-06-21 19:10:43,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:43,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40273591] [2024-06-21 19:10:43,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:43,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:44,871 INFO 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 19:10:44,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:44,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40273591] [2024-06-21 19:10:44,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40273591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:44,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:44,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:44,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985673349] [2024-06-21 19:10:44,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:44,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:44,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:44,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:44,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:44,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:10:44,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 567 transitions, 8372 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:44,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:44,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:10:44,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:46,817 INFO L124 PetriNetUnfolderBase]: 5409/8693 cut-off events. [2024-06-21 19:10:46,817 INFO L125 PetriNetUnfolderBase]: For 1024677/1024683 co-relation queries the response was YES. [2024-06-21 19:10:46,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75250 conditions, 8693 events. 5409/8693 cut-off events. For 1024677/1024683 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 57883 event pairs, 2344 based on Foata normal form. 6/8695 useless extension candidates. Maximal degree in co-relation 75084. Up to 8264 conditions per place. [2024-06-21 19:10:46,946 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 534 selfloop transitions, 41 changer transitions 0/588 dead transitions. [2024-06-21 19:10:46,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 588 transitions, 10152 flow [2024-06-21 19:10:46,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:46,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:46,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 19:10:46,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-21 19:10:46,947 INFO L175 Difference]: Start difference. First operand has 338 places, 567 transitions, 8372 flow. Second operand 9 states and 143 transitions. [2024-06-21 19:10:46,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 588 transitions, 10152 flow [2024-06-21 19:10:50,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 588 transitions, 9980 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-21 19:10:50,933 INFO L231 Difference]: Finished difference. Result has 343 places, 576 transitions, 8516 flow [2024-06-21 19:10:50,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8206, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8516, PETRI_PLACES=343, PETRI_TRANSITIONS=576} [2024-06-21 19:10:50,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-21 19:10:50,934 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 576 transitions, 8516 flow [2024-06-21 19:10:50,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:50,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:50,934 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 19:10:50,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 19:10:50,934 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 19:10:50,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:50,935 INFO L85 PathProgramCache]: Analyzing trace with hash -614191834, now seen corresponding path program 3 times [2024-06-21 19:10:50,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:50,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585409180] [2024-06-21 19:10:50,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:50,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:52,089 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 19:10:52,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:52,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585409180] [2024-06-21 19:10:52,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585409180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:52,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:52,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:52,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316761753] [2024-06-21 19:10:52,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:52,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:52,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:52,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:52,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:52,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:10:52,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 576 transitions, 8516 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:52,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:52,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:10:52,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:54,192 INFO L124 PetriNetUnfolderBase]: 5418/8706 cut-off events. [2024-06-21 19:10:54,192 INFO L125 PetriNetUnfolderBase]: For 1042746/1042752 co-relation queries the response was YES. [2024-06-21 19:10:54,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75163 conditions, 8706 events. 5418/8706 cut-off events. For 1042746/1042752 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 57877 event pairs, 2345 based on Foata normal form. 6/8708 useless extension candidates. Maximal degree in co-relation 74996. Up to 8274 conditions per place. [2024-06-21 19:10:54,305 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 530 selfloop transitions, 47 changer transitions 0/590 dead transitions. [2024-06-21 19:10:54,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 590 transitions, 9968 flow [2024-06-21 19:10:54,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:54,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:54,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 19:10:54,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 19:10:54,306 INFO L175 Difference]: Start difference. First operand has 343 places, 576 transitions, 8516 flow. Second operand 8 states and 131 transitions. [2024-06-21 19:10:54,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 590 transitions, 9968 flow [2024-06-21 19:10:59,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 590 transitions, 9875 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-21 19:10:59,069 INFO L231 Difference]: Finished difference. Result has 347 places, 579 transitions, 8602 flow [2024-06-21 19:10:59,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8429, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8602, PETRI_PLACES=347, PETRI_TRANSITIONS=579} [2024-06-21 19:10:59,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-21 19:10:59,070 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 579 transitions, 8602 flow [2024-06-21 19:10:59,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:59,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:59,070 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 19:10:59,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 19:10:59,070 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 19:10:59,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:59,071 INFO L85 PathProgramCache]: Analyzing trace with hash -621816191, now seen corresponding path program 5 times [2024-06-21 19:10:59,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:59,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989423734] [2024-06-21 19:10:59,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:59,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:00,168 INFO 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 19:11:00,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:00,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989423734] [2024-06-21 19:11:00,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989423734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:00,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:00,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:11:00,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497556776] [2024-06-21 19:11:00,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:00,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:11:00,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:00,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:11:00,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:11:00,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:11:00,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 579 transitions, 8602 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:00,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:00,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:11:00,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:02,291 INFO L124 PetriNetUnfolderBase]: 5415/8702 cut-off events. [2024-06-21 19:11:02,291 INFO L125 PetriNetUnfolderBase]: For 1052046/1052052 co-relation queries the response was YES. [2024-06-21 19:11:02,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75208 conditions, 8702 events. 5415/8702 cut-off events. For 1052046/1052052 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 57893 event pairs, 2353 based on Foata normal form. 2/8700 useless extension candidates. Maximal degree in co-relation 75039. Up to 8238 conditions per place. [2024-06-21 19:11:02,419 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 519 selfloop transitions, 59 changer transitions 0/591 dead transitions. [2024-06-21 19:11:02,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 591 transitions, 10174 flow [2024-06-21 19:11:02,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:11:02,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:11:02,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 19:11:02,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 19:11:02,420 INFO L175 Difference]: Start difference. First operand has 347 places, 579 transitions, 8602 flow. Second operand 8 states and 137 transitions. [2024-06-21 19:11:02,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 591 transitions, 10174 flow [2024-06-21 19:11:06,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 591 transitions, 9983 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-21 19:11:06,603 INFO L231 Difference]: Finished difference. Result has 350 places, 579 transitions, 8535 flow [2024-06-21 19:11:06,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8411, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8535, PETRI_PLACES=350, PETRI_TRANSITIONS=579} [2024-06-21 19:11:06,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-21 19:11:06,603 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 579 transitions, 8535 flow [2024-06-21 19:11:06,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:06,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:06,603 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 19:11:06,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 19:11:06,603 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 19:11:06,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:06,604 INFO L85 PathProgramCache]: Analyzing trace with hash -621816346, now seen corresponding path program 3 times [2024-06-21 19:11:06,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:06,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731035672] [2024-06-21 19:11:06,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:06,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:07,903 INFO 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 19:11:07,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:07,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731035672] [2024-06-21 19:11:07,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731035672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:07,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:07,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:11:07,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190308506] [2024-06-21 19:11:07,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:07,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:11:07,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:07,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:11:07,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:11:08,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:11:08,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 579 transitions, 8535 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:08,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:08,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:11:08,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:09,901 INFO L124 PetriNetUnfolderBase]: 5346/8632 cut-off events. [2024-06-21 19:11:09,901 INFO L125 PetriNetUnfolderBase]: For 1068976/1068982 co-relation queries the response was YES. [2024-06-21 19:11:10,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74731 conditions, 8632 events. 5346/8632 cut-off events. For 1068976/1068982 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 57839 event pairs, 2326 based on Foata normal form. 2/8630 useless extension candidates. Maximal degree in co-relation 74561. Up to 7998 conditions per place. [2024-06-21 19:11:10,045 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 502 selfloop transitions, 39 changer transitions 0/591 dead transitions. [2024-06-21 19:11:10,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 591 transitions, 9719 flow [2024-06-21 19:11:10,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:11:10,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:11:10,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 19:11:10,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:11:10,046 INFO L175 Difference]: Start difference. First operand has 350 places, 579 transitions, 8535 flow. Second operand 7 states and 126 transitions. [2024-06-21 19:11:10,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 591 transitions, 9719 flow [2024-06-21 19:11:14,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 591 transitions, 9597 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 19:11:14,220 INFO L231 Difference]: Finished difference. Result has 351 places, 582 transitions, 8581 flow [2024-06-21 19:11:14,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8413, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8581, PETRI_PLACES=351, PETRI_TRANSITIONS=582} [2024-06-21 19:11:14,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-21 19:11:14,221 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 582 transitions, 8581 flow [2024-06-21 19:11:14,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:14,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:14,221 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 19:11:14,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 19:11:14,221 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 19:11:14,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:14,222 INFO L85 PathProgramCache]: Analyzing trace with hash 351451849, now seen corresponding path program 6 times [2024-06-21 19:11:14,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:14,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511882871] [2024-06-21 19:11:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:14,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:15,387 INFO 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 19:11:15,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:15,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511882871] [2024-06-21 19:11:15,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511882871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:15,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:15,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:11:15,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908584571] [2024-06-21 19:11:15,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:15,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:11:15,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:15,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:11:15,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:11:15,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:11:15,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 582 transitions, 8581 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:15,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:15,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:11:15,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:17,377 INFO L124 PetriNetUnfolderBase]: 5409/8694 cut-off events. [2024-06-21 19:11:17,377 INFO L125 PetriNetUnfolderBase]: For 1082558/1082564 co-relation queries the response was YES. [2024-06-21 19:11:17,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75670 conditions, 8694 events. 5409/8694 cut-off events. For 1082558/1082564 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 57844 event pairs, 2353 based on Foata normal form. 2/8692 useless extension candidates. Maximal degree in co-relation 75499. Up to 8231 conditions per place. [2024-06-21 19:11:17,519 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 518 selfloop transitions, 62 changer transitions 0/593 dead transitions. [2024-06-21 19:11:17,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 593 transitions, 9967 flow [2024-06-21 19:11:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:11:17,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:11:17,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 19:11:17,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:11:17,520 INFO L175 Difference]: Start difference. First operand has 351 places, 582 transitions, 8581 flow. Second operand 8 states and 136 transitions. [2024-06-21 19:11:17,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 593 transitions, 9967 flow [2024-06-21 19:11:21,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 593 transitions, 9791 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-21 19:11:21,940 INFO L231 Difference]: Finished difference. Result has 354 places, 582 transitions, 8535 flow [2024-06-21 19:11:21,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8405, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8535, PETRI_PLACES=354, PETRI_TRANSITIONS=582} [2024-06-21 19:11:21,940 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-21 19:11:21,940 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 582 transitions, 8535 flow [2024-06-21 19:11:21,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:21,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:21,941 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 19:11:21,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 19:11:21,941 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 19:11:21,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:21,942 INFO L85 PathProgramCache]: Analyzing trace with hash -614458744, now seen corresponding path program 4 times [2024-06-21 19:11:21,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:21,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556749368] [2024-06-21 19:11:21,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:21,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:23,032 INFO 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 19:11:23,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:23,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556749368] [2024-06-21 19:11:23,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556749368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:23,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:23,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:11:23,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717810472] [2024-06-21 19:11:23,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:23,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:11:23,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:23,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:11:23,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:11:23,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:11:23,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 582 transitions, 8535 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:23,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:23,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:11:23,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:25,252 INFO L124 PetriNetUnfolderBase]: 5403/8686 cut-off events. [2024-06-21 19:11:25,252 INFO L125 PetriNetUnfolderBase]: For 1096676/1096682 co-relation queries the response was YES. [2024-06-21 19:11:25,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75558 conditions, 8686 events. 5403/8686 cut-off events. For 1096676/1096682 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 57823 event pairs, 2302 based on Foata normal form. 6/8688 useless extension candidates. Maximal degree in co-relation 75386. Up to 8257 conditions per place. [2024-06-21 19:11:25,367 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 535 selfloop transitions, 45 changer transitions 0/593 dead transitions. [2024-06-21 19:11:25,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 593 transitions, 9923 flow [2024-06-21 19:11:25,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:11:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:11:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 19:11:25,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 19:11:25,368 INFO L175 Difference]: Start difference. First operand has 354 places, 582 transitions, 8535 flow. Second operand 9 states and 141 transitions. [2024-06-21 19:11:25,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 593 transitions, 9923 flow [2024-06-21 19:11:30,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 593 transitions, 9733 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 19:11:30,582 INFO L231 Difference]: Finished difference. Result has 355 places, 582 transitions, 8441 flow [2024-06-21 19:11:30,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8345, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8441, PETRI_PLACES=355, PETRI_TRANSITIONS=582} [2024-06-21 19:11:30,583 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-21 19:11:30,583 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 582 transitions, 8441 flow [2024-06-21 19:11:30,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:30,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:30,583 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 19:11:30,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 19:11:30,583 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 19:11:30,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:30,583 INFO L85 PathProgramCache]: Analyzing trace with hash 351728896, now seen corresponding path program 1 times [2024-06-21 19:11:30,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:30,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468736952] [2024-06-21 19:11:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:30,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:32,049 INFO 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 19:11:32,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:32,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468736952] [2024-06-21 19:11:32,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468736952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:32,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:32,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:11:32,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111153112] [2024-06-21 19:11:32,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:32,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:11:32,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:32,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:11:32,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:11:32,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:11:32,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 582 transitions, 8441 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 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 19:11:32,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:32,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:11:32,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:34,175 INFO L124 PetriNetUnfolderBase]: 5486/8767 cut-off events. [2024-06-21 19:11:34,176 INFO L125 PetriNetUnfolderBase]: For 1106145/1106145 co-relation queries the response was YES. [2024-06-21 19:11:34,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75962 conditions, 8767 events. 5486/8767 cut-off events. For 1106145/1106145 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 57948 event pairs, 2374 based on Foata normal form. 1/8765 useless extension candidates. Maximal degree in co-relation 75789. Up to 8476 conditions per place. [2024-06-21 19:11:34,311 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 570 selfloop transitions, 22 changer transitions 0/596 dead transitions. [2024-06-21 19:11:34,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 596 transitions, 9755 flow [2024-06-21 19:11:34,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:11:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:11:34,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 139 transitions. [2024-06-21 19:11:34,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33095238095238094 [2024-06-21 19:11:34,312 INFO L175 Difference]: Start difference. First operand has 355 places, 582 transitions, 8441 flow. Second operand 10 states and 139 transitions. [2024-06-21 19:11:34,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 596 transitions, 9755 flow [2024-06-21 19:11:38,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 596 transitions, 9672 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 19:11:38,579 INFO L231 Difference]: Finished difference. Result has 358 places, 585 transitions, 8514 flow [2024-06-21 19:11:38,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8358, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8514, PETRI_PLACES=358, PETRI_TRANSITIONS=585} [2024-06-21 19:11:38,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-21 19:11:38,579 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 585 transitions, 8514 flow [2024-06-21 19:11:38,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 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 19:11:38,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:38,579 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 19:11:38,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 19:11:38,580 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 19:11:38,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:38,580 INFO L85 PathProgramCache]: Analyzing trace with hash 578001158, now seen corresponding path program 1 times [2024-06-21 19:11:38,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:38,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329537022] [2024-06-21 19:11:38,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:38,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:39,455 INFO 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 19:11:39,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:39,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329537022] [2024-06-21 19:11:39,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329537022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:39,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:39,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:11:39,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120068610] [2024-06-21 19:11:39,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:39,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:11:39,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:39,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:11:39,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:11:39,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:11:39,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 585 transitions, 8514 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:39,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:39,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:11:39,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:41,605 INFO L124 PetriNetUnfolderBase]: 5430/8709 cut-off events. [2024-06-21 19:11:41,605 INFO L125 PetriNetUnfolderBase]: For 1133257/1133263 co-relation queries the response was YES. [2024-06-21 19:11:41,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76103 conditions, 8709 events. 5430/8709 cut-off events. For 1133257/1133263 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 57814 event pairs, 1388 based on Foata normal form. 3/8699 useless extension candidates. Maximal degree in co-relation 75929. Up to 7620 conditions per place. [2024-06-21 19:11:41,738 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 447 selfloop transitions, 136 changer transitions 0/624 dead transitions. [2024-06-21 19:11:41,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 624 transitions, 10080 flow [2024-06-21 19:11:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:11:41,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:11:41,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 19:11:41,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 19:11:41,739 INFO L175 Difference]: Start difference. First operand has 358 places, 585 transitions, 8514 flow. Second operand 9 states and 160 transitions. [2024-06-21 19:11:41,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 624 transitions, 10080 flow [2024-06-21 19:11:45,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 624 transitions, 9822 flow, removed 51 selfloop flow, removed 11 redundant places. [2024-06-21 19:11:45,886 INFO L231 Difference]: Finished difference. Result has 357 places, 602 transitions, 8843 flow [2024-06-21 19:11:45,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8256, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8843, PETRI_PLACES=357, PETRI_TRANSITIONS=602} [2024-06-21 19:11:45,887 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-21 19:11:45,887 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 602 transitions, 8843 flow [2024-06-21 19:11:45,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:45,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:45,887 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 19:11:45,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 19:11:45,887 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:11:45,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:45,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1265656394, now seen corresponding path program 1 times [2024-06-21 19:11:45,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:45,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689796878] [2024-06-21 19:11:45,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:45,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:46,865 INFO 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 19:11:46,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:46,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689796878] [2024-06-21 19:11:46,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689796878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:46,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:46,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:11:46,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173498570] [2024-06-21 19:11:46,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:46,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:11:46,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:46,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:11:46,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:11:46,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:11:46,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 602 transitions, 8843 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:46,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:46,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:11:46,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:48,987 INFO L124 PetriNetUnfolderBase]: 5516/8811 cut-off events. [2024-06-21 19:11:48,987 INFO L125 PetriNetUnfolderBase]: For 1169287/1169293 co-relation queries the response was YES. [2024-06-21 19:11:49,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78920 conditions, 8811 events. 5516/8811 cut-off events. For 1169287/1169293 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 58186 event pairs, 1673 based on Foata normal form. 8/8806 useless extension candidates. Maximal degree in co-relation 78745. Up to 8318 conditions per place. [2024-06-21 19:11:49,125 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 547 selfloop transitions, 75 changer transitions 0/626 dead transitions. [2024-06-21 19:11:49,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 626 transitions, 10326 flow [2024-06-21 19:11:49,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:11:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:11:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 19:11:49,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:11:49,126 INFO L175 Difference]: Start difference. First operand has 357 places, 602 transitions, 8843 flow. Second operand 8 states and 136 transitions. [2024-06-21 19:11:49,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 626 transitions, 10326 flow [2024-06-21 19:11:53,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 626 transitions, 10022 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-21 19:11:53,059 INFO L231 Difference]: Finished difference. Result has 360 places, 610 transitions, 8888 flow [2024-06-21 19:11:53,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8539, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8888, PETRI_PLACES=360, PETRI_TRANSITIONS=610} [2024-06-21 19:11:53,059 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-21 19:11:53,060 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 610 transitions, 8888 flow [2024-06-21 19:11:53,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:53,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:11:53,060 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 19:11:53,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 19:11:53,060 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:11:53,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:11:53,060 INFO L85 PathProgramCache]: Analyzing trace with hash 578121128, now seen corresponding path program 2 times [2024-06-21 19:11:53,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:11:53,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841201745] [2024-06-21 19:11:53,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:11:53,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:11:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:11:54,026 INFO 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 19:11:54,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:11:54,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841201745] [2024-06-21 19:11:54,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841201745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:11:54,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:11:54,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:11:54,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491653796] [2024-06-21 19:11:54,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:11:54,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:11:54,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:11:54,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:11:54,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:11:54,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:11:54,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 610 transitions, 8888 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:11:54,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:11:54,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:11:54,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:11:56,169 INFO L124 PetriNetUnfolderBase]: 5474/8770 cut-off events. [2024-06-21 19:11:56,169 INFO L125 PetriNetUnfolderBase]: For 1195483/1195489 co-relation queries the response was YES. [2024-06-21 19:11:56,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78887 conditions, 8770 events. 5474/8770 cut-off events. For 1195483/1195489 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 58203 event pairs, 1388 based on Foata normal form. 3/8760 useless extension candidates. Maximal degree in co-relation 78711. Up to 7624 conditions per place. [2024-06-21 19:11:56,318 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 443 selfloop transitions, 152 changer transitions 0/638 dead transitions. [2024-06-21 19:11:56,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 638 transitions, 10598 flow [2024-06-21 19:11:56,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:11:56,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:11:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 19:11:56,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 19:11:56,319 INFO L175 Difference]: Start difference. First operand has 360 places, 610 transitions, 8888 flow. Second operand 9 states and 161 transitions. [2024-06-21 19:11:56,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 638 transitions, 10598 flow [2024-06-21 19:12:01,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 638 transitions, 10367 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-21 19:12:01,189 INFO L231 Difference]: Finished difference. Result has 364 places, 618 transitions, 9213 flow [2024-06-21 19:12:01,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8657, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9213, PETRI_PLACES=364, PETRI_TRANSITIONS=618} [2024-06-21 19:12:01,189 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-21 19:12:01,189 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 618 transitions, 9213 flow [2024-06-21 19:12:01,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:01,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:12:01,189 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 19:12:01,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 19:12:01,189 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:12:01,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:12:01,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1088287724, now seen corresponding path program 2 times [2024-06-21 19:12:01,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:12:01,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918476460] [2024-06-21 19:12:01,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:12:01,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:12:01,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:12:02,256 INFO 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 19:12:02,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:12:02,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918476460] [2024-06-21 19:12:02,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918476460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:12:02,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:12:02,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:12:02,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277363755] [2024-06-21 19:12:02,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:12:02,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:12:02,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:12:02,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:12:02,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:12:02,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:12:02,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 618 transitions, 9213 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:02,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:12:02,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:12:02,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:12:04,567 INFO L124 PetriNetUnfolderBase]: 5562/8877 cut-off events. [2024-06-21 19:12:04,567 INFO L125 PetriNetUnfolderBase]: For 1236457/1236463 co-relation queries the response was YES. [2024-06-21 19:12:04,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81511 conditions, 8877 events. 5562/8877 cut-off events. For 1236457/1236463 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 58587 event pairs, 1571 based on Foata normal form. 8/8872 useless extension candidates. Maximal degree in co-relation 81333. Up to 8212 conditions per place. [2024-06-21 19:12:04,697 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 501 selfloop transitions, 135 changer transitions 0/640 dead transitions. [2024-06-21 19:12:04,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 640 transitions, 10919 flow [2024-06-21 19:12:04,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:12:04,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:12:04,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 19:12:04,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 19:12:04,698 INFO L175 Difference]: Start difference. First operand has 364 places, 618 transitions, 9213 flow. Second operand 9 states and 144 transitions. [2024-06-21 19:12:04,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 640 transitions, 10919 flow [2024-06-21 19:12:09,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 640 transitions, 10645 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-21 19:12:09,504 INFO L231 Difference]: Finished difference. Result has 368 places, 626 transitions, 9418 flow [2024-06-21 19:12:09,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8939, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9418, PETRI_PLACES=368, PETRI_TRANSITIONS=626} [2024-06-21 19:12:09,505 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-21 19:12:09,505 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 626 transitions, 9418 flow [2024-06-21 19:12:09,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:09,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:12:09,505 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 19:12:09,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 19:12:09,505 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:12:09,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:12:09,505 INFO L85 PathProgramCache]: Analyzing trace with hash 582762944, now seen corresponding path program 3 times [2024-06-21 19:12:09,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:12:09,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718994341] [2024-06-21 19:12:09,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:12:09,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:12:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:12:10,567 INFO 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 19:12:10,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:12:10,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718994341] [2024-06-21 19:12:10,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718994341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:12:10,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:12:10,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:12:10,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370077629] [2024-06-21 19:12:10,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:12:10,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:12:10,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:12:10,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:12:10,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:12:10,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:12:10,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 626 transitions, 9418 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:10,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:12:10,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:12:10,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:12:12,745 INFO L124 PetriNetUnfolderBase]: 5566/8883 cut-off events. [2024-06-21 19:12:12,746 INFO L125 PetriNetUnfolderBase]: For 1245387/1245393 co-relation queries the response was YES. [2024-06-21 19:12:12,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81840 conditions, 8883 events. 5566/8883 cut-off events. For 1245387/1245393 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 58616 event pairs, 1571 based on Foata normal form. 8/8878 useless extension candidates. Maximal degree in co-relation 81660. Up to 8214 conditions per place. [2024-06-21 19:12:12,884 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 504 selfloop transitions, 138 changer transitions 0/646 dead transitions. [2024-06-21 19:12:12,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 646 transitions, 11119 flow [2024-06-21 19:12:12,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:12:12,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:12:12,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 19:12:12,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 19:12:12,886 INFO L175 Difference]: Start difference. First operand has 368 places, 626 transitions, 9418 flow. Second operand 9 states and 145 transitions. [2024-06-21 19:12:12,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 646 transitions, 11119 flow [2024-06-21 19:12:17,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 646 transitions, 10814 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-21 19:12:17,241 INFO L231 Difference]: Finished difference. Result has 371 places, 632 transitions, 9572 flow [2024-06-21 19:12:17,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9117, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9572, PETRI_PLACES=371, PETRI_TRANSITIONS=632} [2024-06-21 19:12:17,242 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-21 19:12:17,242 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 632 transitions, 9572 flow [2024-06-21 19:12:17,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:17,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:12:17,242 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 19:12:17,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 19:12:17,242 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:12:17,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:12:17,242 INFO L85 PathProgramCache]: Analyzing trace with hash 755252648, now seen corresponding path program 3 times [2024-06-21 19:12:17,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:12:17,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646396142] [2024-06-21 19:12:17,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:12:17,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:12:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:12:18,267 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 19:12:18,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:12:18,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646396142] [2024-06-21 19:12:18,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646396142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:12:18,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:12:18,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:12:18,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207989605] [2024-06-21 19:12:18,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:12:18,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:12:18,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:12:18,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:12:18,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:12:18,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:12:18,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 632 transitions, 9572 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:18,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:12:18,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:12:18,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:12:20,472 INFO L124 PetriNetUnfolderBase]: 5542/8877 cut-off events. [2024-06-21 19:12:20,472 INFO L125 PetriNetUnfolderBase]: For 1282845/1282851 co-relation queries the response was YES. [2024-06-21 19:12:20,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82659 conditions, 8877 events. 5542/8877 cut-off events. For 1282845/1282851 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 58984 event pairs, 1372 based on Foata normal form. 3/8867 useless extension candidates. Maximal degree in co-relation 82478. Up to 7525 conditions per place. [2024-06-21 19:12:20,615 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 446 selfloop transitions, 164 changer transitions 0/657 dead transitions. [2024-06-21 19:12:20,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 657 transitions, 11310 flow [2024-06-21 19:12:20,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:12:20,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:12:20,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 19:12:20,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 19:12:20,616 INFO L175 Difference]: Start difference. First operand has 371 places, 632 transitions, 9572 flow. Second operand 9 states and 157 transitions. [2024-06-21 19:12:20,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 657 transitions, 11310 flow [2024-06-21 19:12:25,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 657 transitions, 11015 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-21 19:12:25,568 INFO L231 Difference]: Finished difference. Result has 375 places, 640 transitions, 9894 flow [2024-06-21 19:12:25,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9277, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9894, PETRI_PLACES=375, PETRI_TRANSITIONS=640} [2024-06-21 19:12:25,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-21 19:12:25,568 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 640 transitions, 9894 flow [2024-06-21 19:12:25,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:25,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:12:25,568 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 19:12:25,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 19:12:25,568 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:12:25,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:12:25,569 INFO L85 PathProgramCache]: Analyzing trace with hash 459671306, now seen corresponding path program 1 times [2024-06-21 19:12:25,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:12:25,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755070391] [2024-06-21 19:12:25,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:12:25,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:12:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:12:26,467 INFO 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 19:12:26,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:12:26,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755070391] [2024-06-21 19:12:26,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755070391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:12:26,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:12:26,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:12:26,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511837780] [2024-06-21 19:12:26,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:12:26,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:12:26,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:12:26,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:12:26,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:12:26,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:12:26,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 640 transitions, 9894 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:26,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:12:26,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:12:26,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:12:28,912 INFO L124 PetriNetUnfolderBase]: 5558/8915 cut-off events. [2024-06-21 19:12:28,912 INFO L125 PetriNetUnfolderBase]: For 1337945/1337951 co-relation queries the response was YES. [2024-06-21 19:12:29,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85296 conditions, 8915 events. 5558/8915 cut-off events. For 1337945/1337951 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 59550 event pairs, 1503 based on Foata normal form. 8/8905 useless extension candidates. Maximal degree in co-relation 85113. Up to 8091 conditions per place. [2024-06-21 19:12:29,045 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 546 selfloop transitions, 72 changer transitions 0/665 dead transitions. [2024-06-21 19:12:29,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 665 transitions, 11329 flow [2024-06-21 19:12:29,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:12:29,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:12:29,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 19:12:29,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 19:12:29,046 INFO L175 Difference]: Start difference. First operand has 375 places, 640 transitions, 9894 flow. Second operand 9 states and 157 transitions. [2024-06-21 19:12:29,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 665 transitions, 11329 flow [2024-06-21 19:12:34,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 665 transitions, 11076 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-21 19:12:34,463 INFO L231 Difference]: Finished difference. Result has 379 places, 643 transitions, 9926 flow [2024-06-21 19:12:34,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9641, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9926, PETRI_PLACES=379, PETRI_TRANSITIONS=643} [2024-06-21 19:12:34,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-21 19:12:34,463 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 643 transitions, 9926 flow [2024-06-21 19:12:34,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:34,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:12:34,463 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 19:12:34,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 19:12:34,463 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:12:34,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:12:34,464 INFO L85 PathProgramCache]: Analyzing trace with hash 745298486, now seen corresponding path program 2 times [2024-06-21 19:12:34,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:12:34,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211216209] [2024-06-21 19:12:34,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:12:34,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:12:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:12:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:12:35,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:12:35,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211216209] [2024-06-21 19:12:35,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211216209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:12:35,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:12:35,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:12:35,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844901878] [2024-06-21 19:12:35,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:12:35,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:12:35,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:12:35,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:12:35,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:12:35,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:12:35,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 643 transitions, 9926 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:35,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:12:35,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:12:35,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:12:37,822 INFO L124 PetriNetUnfolderBase]: 5572/8925 cut-off events. [2024-06-21 19:12:37,822 INFO L125 PetriNetUnfolderBase]: For 1355987/1355993 co-relation queries the response was YES. [2024-06-21 19:12:37,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85824 conditions, 8925 events. 5572/8925 cut-off events. For 1355987/1355993 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 59445 event pairs, 1577 based on Foata normal form. 8/8920 useless extension candidates. Maximal degree in co-relation 85639. Up to 8211 conditions per place. [2024-06-21 19:12:37,963 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 544 selfloop transitions, 72 changer transitions 0/663 dead transitions. [2024-06-21 19:12:37,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 663 transitions, 11340 flow [2024-06-21 19:12:37,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:12:37,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:12:37,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 19:12:37,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:12:37,964 INFO L175 Difference]: Start difference. First operand has 379 places, 643 transitions, 9926 flow. Second operand 9 states and 153 transitions. [2024-06-21 19:12:37,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 663 transitions, 11340 flow [2024-06-21 19:12:43,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 663 transitions, 11021 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-21 19:12:43,598 INFO L231 Difference]: Finished difference. Result has 380 places, 646 transitions, 9897 flow [2024-06-21 19:12:43,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9607, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9897, PETRI_PLACES=380, PETRI_TRANSITIONS=646} [2024-06-21 19:12:43,599 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-21 19:12:43,599 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 646 transitions, 9897 flow [2024-06-21 19:12:43,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:43,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:12:43,599 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 19:12:43,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 19:12:43,599 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:12:43,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:12:43,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1088648192, now seen corresponding path program 3 times [2024-06-21 19:12:43,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:12:43,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297905897] [2024-06-21 19:12:43,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:12:43,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:12:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:12:44,688 INFO 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 19:12:44,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:12:44,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297905897] [2024-06-21 19:12:44,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297905897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:12:44,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:12:44,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:12:44,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645813133] [2024-06-21 19:12:44,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:12:44,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:12:44,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:12:44,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:12:44,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:12:44,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:12:44,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 646 transitions, 9897 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:44,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:12:44,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:12:44,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:12:46,935 INFO L124 PetriNetUnfolderBase]: 5590/8949 cut-off events. [2024-06-21 19:12:46,936 INFO L125 PetriNetUnfolderBase]: For 1380850/1380856 co-relation queries the response was YES. [2024-06-21 19:12:47,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86189 conditions, 8949 events. 5590/8949 cut-off events. For 1380850/1380856 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 59619 event pairs, 1550 based on Foata normal form. 8/8944 useless extension candidates. Maximal degree in co-relation 86003. Up to 8169 conditions per place. [2024-06-21 19:12:47,089 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 519 selfloop transitions, 97 changer transitions 0/663 dead transitions. [2024-06-21 19:12:47,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 663 transitions, 11307 flow [2024-06-21 19:12:47,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:12:47,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:12:47,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 19:12:47,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 19:12:47,090 INFO L175 Difference]: Start difference. First operand has 380 places, 646 transitions, 9897 flow. Second operand 8 states and 141 transitions. [2024-06-21 19:12:47,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 663 transitions, 11307 flow [2024-06-21 19:12:51,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 663 transitions, 11043 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-21 19:12:51,490 INFO L231 Difference]: Finished difference. Result has 381 places, 649 transitions, 9978 flow [2024-06-21 19:12:51,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9633, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9978, PETRI_PLACES=381, PETRI_TRANSITIONS=649} [2024-06-21 19:12:51,490 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-21 19:12:51,490 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 649 transitions, 9978 flow [2024-06-21 19:12:51,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:12:51,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:12:51,490 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 19:12:51,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 19:12:51,490 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:12:51,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:12:51,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1375524610, now seen corresponding path program 1 times [2024-06-21 19:12:51,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:12:51,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475438560] [2024-06-21 19:12:51,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:12:51,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:12:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:12:52,596 INFO 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 19:12:52,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:12:52,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475438560] [2024-06-21 19:12:52,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475438560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:12:52,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:12:52,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:12:52,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352704550] [2024-06-21 19:12:52,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:12:52,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:12:52,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:12:52,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:12:52,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:12:52,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:12:52,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 649 transitions, 9978 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 19:12:52,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:12:52,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:12:52,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:12:55,082 INFO L124 PetriNetUnfolderBase]: 5666/9031 cut-off events. [2024-06-21 19:12:55,082 INFO L125 PetriNetUnfolderBase]: For 1388264/1388270 co-relation queries the response was YES. [2024-06-21 19:12:55,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86981 conditions, 9031 events. 5666/9031 cut-off events. For 1388264/1388270 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 59861 event pairs, 1597 based on Foata normal form. 6/9024 useless extension candidates. Maximal degree in co-relation 86794. Up to 8516 conditions per place. [2024-06-21 19:12:55,222 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 581 selfloop transitions, 85 changer transitions 0/670 dead transitions. [2024-06-21 19:12:55,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 670 transitions, 11496 flow [2024-06-21 19:12:55,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:12:55,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:12:55,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 19:12:55,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 19:12:55,223 INFO L175 Difference]: Start difference. First operand has 381 places, 649 transitions, 9978 flow. Second operand 9 states and 150 transitions. [2024-06-21 19:12:55,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 670 transitions, 11496 flow [2024-06-21 19:12:59,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 670 transitions, 11175 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-21 19:12:59,027 INFO L231 Difference]: Finished difference. Result has 384 places, 653 transitions, 9980 flow [2024-06-21 19:12:59,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9657, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9980, PETRI_PLACES=384, PETRI_TRANSITIONS=653} [2024-06-21 19:12:59,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-21 19:12:59,027 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 653 transitions, 9980 flow [2024-06-21 19:12:59,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 19:12:59,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:12:59,027 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 19:12:59,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 19:12:59,027 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:12:59,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:12:59,027 INFO L85 PathProgramCache]: Analyzing trace with hash 755486388, now seen corresponding path program 2 times [2024-06-21 19:12:59,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:12:59,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707327732] [2024-06-21 19:12:59,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:12:59,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:12:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:00,222 INFO 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 19:13:00,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:00,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707327732] [2024-06-21 19:13:00,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707327732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:00,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:00,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:13:00,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519698723] [2024-06-21 19:13:00,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:00,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:13:00,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:00,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:13:00,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:13:00,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:13:00,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 653 transitions, 9980 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 19:13:00,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:00,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:13:00,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:02,563 INFO L124 PetriNetUnfolderBase]: 5718/9107 cut-off events. [2024-06-21 19:13:02,563 INFO L125 PetriNetUnfolderBase]: For 1445422/1445428 co-relation queries the response was YES. [2024-06-21 19:13:02,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88978 conditions, 9107 events. 5718/9107 cut-off events. For 1445422/1445428 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 60362 event pairs, 1570 based on Foata normal form. 6/9100 useless extension candidates. Maximal degree in co-relation 88790. Up to 8329 conditions per place. [2024-06-21 19:13:02,714 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 534 selfloop transitions, 144 changer transitions 0/682 dead transitions. [2024-06-21 19:13:02,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 682 transitions, 12300 flow [2024-06-21 19:13:02,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:13:02,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:13:02,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-21 19:13:02,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 19:13:02,715 INFO L175 Difference]: Start difference. First operand has 384 places, 653 transitions, 9980 flow. Second operand 10 states and 160 transitions. [2024-06-21 19:13:02,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 682 transitions, 12300 flow [2024-06-21 19:13:08,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 682 transitions, 12009 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-21 19:13:08,687 INFO L231 Difference]: Finished difference. Result has 389 places, 665 transitions, 10493 flow [2024-06-21 19:13:08,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9689, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10493, PETRI_PLACES=389, PETRI_TRANSITIONS=665} [2024-06-21 19:13:08,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-21 19:13:08,687 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 665 transitions, 10493 flow [2024-06-21 19:13:08,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 19:13:08,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:08,688 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 19:13:08,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 19:13:08,688 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:13:08,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:08,688 INFO L85 PathProgramCache]: Analyzing trace with hash 755498478, now seen corresponding path program 3 times [2024-06-21 19:13:08,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:08,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128129578] [2024-06-21 19:13:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:08,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:13:09,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:09,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128129578] [2024-06-21 19:13:09,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128129578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:09,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:09,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:13:09,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875446775] [2024-06-21 19:13:09,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:09,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:13:09,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:09,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:13:09,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:13:10,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:13:10,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 665 transitions, 10493 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 19:13:10,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:10,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:13:10,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:12,320 INFO L124 PetriNetUnfolderBase]: 5714/9103 cut-off events. [2024-06-21 19:13:12,320 INFO L125 PetriNetUnfolderBase]: For 1468295/1468301 co-relation queries the response was YES. [2024-06-21 19:13:12,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89940 conditions, 9103 events. 5714/9103 cut-off events. For 1468295/1468301 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 60323 event pairs, 1570 based on Foata normal form. 6/9096 useless extension candidates. Maximal degree in co-relation 89749. Up to 8327 conditions per place. [2024-06-21 19:13:12,483 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 532 selfloop transitions, 146 changer transitions 0/682 dead transitions. [2024-06-21 19:13:12,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 682 transitions, 12413 flow [2024-06-21 19:13:12,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:13:12,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:13:12,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 19:13:12,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 19:13:12,484 INFO L175 Difference]: Start difference. First operand has 389 places, 665 transitions, 10493 flow. Second operand 9 states and 151 transitions. [2024-06-21 19:13:12,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 682 transitions, 12413 flow [2024-06-21 19:13:18,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 682 transitions, 12022 flow, removed 146 selfloop flow, removed 5 redundant places. [2024-06-21 19:13:18,256 INFO L231 Difference]: Finished difference. Result has 393 places, 665 transitions, 10403 flow [2024-06-21 19:13:18,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10102, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10403, PETRI_PLACES=393, PETRI_TRANSITIONS=665} [2024-06-21 19:13:18,257 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-21 19:13:18,257 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 665 transitions, 10403 flow [2024-06-21 19:13:18,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 19:13:18,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:18,257 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 19:13:18,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 19:13:18,257 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:13:18,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:18,258 INFO L85 PathProgramCache]: Analyzing trace with hash 768809302, now seen corresponding path program 1 times [2024-06-21 19:13:18,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:18,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680873325] [2024-06-21 19:13:18,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:18,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:19,351 INFO 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 19:13:19,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:19,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680873325] [2024-06-21 19:13:19,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680873325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:19,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:19,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:19,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560711339] [2024-06-21 19:13:19,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:19,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:19,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:19,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:19,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:19,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:13:19,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 665 transitions, 10403 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:19,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:19,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:13:19,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:21,680 INFO L124 PetriNetUnfolderBase]: 5719/9113 cut-off events. [2024-06-21 19:13:21,681 INFO L125 PetriNetUnfolderBase]: For 1483746/1483748 co-relation queries the response was YES. [2024-06-21 19:13:21,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90324 conditions, 9113 events. 5719/9113 cut-off events. For 1483746/1483748 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 60531 event pairs, 1968 based on Foata normal form. 3/9113 useless extension candidates. Maximal degree in co-relation 90132. Up to 8765 conditions per place. [2024-06-21 19:13:21,824 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 634 selfloop transitions, 45 changer transitions 0/684 dead transitions. [2024-06-21 19:13:21,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 684 transitions, 11933 flow [2024-06-21 19:13:21,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:13:21,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:13:21,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 19:13:21,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 19:13:21,825 INFO L175 Difference]: Start difference. First operand has 393 places, 665 transitions, 10403 flow. Second operand 8 states and 143 transitions. [2024-06-21 19:13:21,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 684 transitions, 11933 flow [2024-06-21 19:13:25,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 684 transitions, 11655 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 19:13:25,816 INFO L231 Difference]: Finished difference. Result has 395 places, 668 transitions, 10353 flow [2024-06-21 19:13:25,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10125, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10353, PETRI_PLACES=395, PETRI_TRANSITIONS=668} [2024-06-21 19:13:25,816 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-21 19:13:25,817 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 668 transitions, 10353 flow [2024-06-21 19:13:25,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:25,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:25,817 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 19:13:25,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 19:13:25,817 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:13:25,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:25,817 INFO L85 PathProgramCache]: Analyzing trace with hash 755140428, now seen corresponding path program 4 times [2024-06-21 19:13:25,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:25,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869301315] [2024-06-21 19:13:25,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:25,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:27,053 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 19:13:27,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:27,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869301315] [2024-06-21 19:13:27,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869301315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:27,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:27,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:13:27,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546550089] [2024-06-21 19:13:27,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:27,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:13:27,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:27,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:13:27,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:13:27,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:13:27,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 668 transitions, 10353 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 19:13:27,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:27,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:13:27,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:29,384 INFO L124 PetriNetUnfolderBase]: 5721/9113 cut-off events. [2024-06-21 19:13:29,384 INFO L125 PetriNetUnfolderBase]: For 1493871/1493877 co-relation queries the response was YES. [2024-06-21 19:13:29,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90310 conditions, 9113 events. 5721/9113 cut-off events. For 1493871/1493877 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 60379 event pairs, 1569 based on Foata normal form. 6/9106 useless extension candidates. Maximal degree in co-relation 90117. Up to 8338 conditions per place. [2024-06-21 19:13:29,542 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 534 selfloop transitions, 149 changer transitions 0/687 dead transitions. [2024-06-21 19:13:29,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 687 transitions, 12129 flow [2024-06-21 19:13:29,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:13:29,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:13:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 19:13:29,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 19:13:29,543 INFO L175 Difference]: Start difference. First operand has 395 places, 668 transitions, 10353 flow. Second operand 9 states and 152 transitions. [2024-06-21 19:13:29,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 687 transitions, 12129 flow [2024-06-21 19:13:35,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 687 transitions, 11927 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-21 19:13:35,096 INFO L231 Difference]: Finished difference. Result has 398 places, 672 transitions, 10599 flow [2024-06-21 19:13:35,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10151, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10599, PETRI_PLACES=398, PETRI_TRANSITIONS=672} [2024-06-21 19:13:35,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-21 19:13:35,096 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 672 transitions, 10599 flow [2024-06-21 19:13:35,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 19:13:35,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:35,096 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 19:13:35,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 19:13:35,096 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:13:35,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:35,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1059041078, now seen corresponding path program 4 times [2024-06-21 19:13:35,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:35,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012769382] [2024-06-21 19:13:35,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:35,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:35,952 INFO 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 19:13:35,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:35,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012769382] [2024-06-21 19:13:35,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012769382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:35,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:35,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:35,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260792626] [2024-06-21 19:13:35,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:35,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:35,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:35,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:35,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:36,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:13:36,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 672 transitions, 10599 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:36,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:36,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:13:36,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:38,629 INFO L124 PetriNetUnfolderBase]: 5653/9025 cut-off events. [2024-06-21 19:13:38,629 INFO L125 PetriNetUnfolderBase]: For 1518269/1518269 co-relation queries the response was YES. [2024-06-21 19:13:38,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90534 conditions, 9025 events. 5653/9025 cut-off events. For 1518269/1518269 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 59922 event pairs, 1313 based on Foata normal form. 1/8987 useless extension candidates. Maximal degree in co-relation 90339. Up to 7934 conditions per place. [2024-06-21 19:13:38,766 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 499 selfloop transitions, 166 changer transitions 0/712 dead transitions. [2024-06-21 19:13:38,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 712 transitions, 12373 flow [2024-06-21 19:13:38,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:13:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:13:38,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 19:13:38,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 19:13:38,767 INFO L175 Difference]: Start difference. First operand has 398 places, 672 transitions, 10599 flow. Second operand 8 states and 147 transitions. [2024-06-21 19:13:38,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 712 transitions, 12373 flow [2024-06-21 19:13:42,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 712 transitions, 12048 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-21 19:13:42,793 INFO L231 Difference]: Finished difference. Result has 402 places, 690 transitions, 10991 flow [2024-06-21 19:13:42,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10274, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10991, PETRI_PLACES=402, PETRI_TRANSITIONS=690} [2024-06-21 19:13:42,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-21 19:13:42,793 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 690 transitions, 10991 flow [2024-06-21 19:13:42,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:42,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:42,793 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 19:13:42,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 19:13:42,794 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:13:42,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:42,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1544612528, now seen corresponding path program 5 times [2024-06-21 19:13:42,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:42,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796473349] [2024-06-21 19:13:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:42,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:13:43,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:43,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796473349] [2024-06-21 19:13:43,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796473349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:43,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:43,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:43,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583702100] [2024-06-21 19:13:43,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:43,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:43,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:43,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:43,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:43,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:13:43,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 690 transitions, 10991 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:43,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:43,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:13:43,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:46,198 INFO L124 PetriNetUnfolderBase]: 5658/9031 cut-off events. [2024-06-21 19:13:46,198 INFO L125 PetriNetUnfolderBase]: For 1552719/1552719 co-relation queries the response was YES. [2024-06-21 19:13:46,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92185 conditions, 9031 events. 5658/9031 cut-off events. For 1552719/1552719 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 59963 event pairs, 1326 based on Foata normal form. 1/8991 useless extension candidates. Maximal degree in co-relation 91986. Up to 7939 conditions per place. [2024-06-21 19:13:46,356 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 509 selfloop transitions, 160 changer transitions 0/716 dead transitions. [2024-06-21 19:13:46,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 716 transitions, 12592 flow [2024-06-21 19:13:46,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:13:46,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:13:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 19:13:46,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 19:13:46,357 INFO L175 Difference]: Start difference. First operand has 402 places, 690 transitions, 10991 flow. Second operand 9 states and 157 transitions. [2024-06-21 19:13:46,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 716 transitions, 12592 flow [2024-06-21 19:13:51,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 716 transitions, 12247 flow, removed 67 selfloop flow, removed 3 redundant places. [2024-06-21 19:13:51,995 INFO L231 Difference]: Finished difference. Result has 409 places, 694 transitions, 11114 flow [2024-06-21 19:13:51,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10660, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11114, PETRI_PLACES=409, PETRI_TRANSITIONS=694} [2024-06-21 19:13:51,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-21 19:13:51,995 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 694 transitions, 11114 flow [2024-06-21 19:13:51,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:51,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:51,995 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 19:13:51,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 19:13:51,995 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:13:51,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:51,996 INFO L85 PathProgramCache]: Analyzing trace with hash 743760262, now seen corresponding path program 6 times [2024-06-21 19:13:51,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:51,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865782010] [2024-06-21 19:13:51,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:51,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:52,946 INFO 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 19:13:52,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:52,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865782010] [2024-06-21 19:13:52,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865782010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:52,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:52,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:52,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893748541] [2024-06-21 19:13:52,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:52,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:52,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:52,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:52,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:52,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:13:53,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 694 transitions, 11114 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:53,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:53,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:13:53,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:55,308 INFO L124 PetriNetUnfolderBase]: 5654/9024 cut-off events. [2024-06-21 19:13:55,308 INFO L125 PetriNetUnfolderBase]: For 1571398/1571398 co-relation queries the response was YES. [2024-06-21 19:13:55,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92156 conditions, 9024 events. 5654/9024 cut-off events. For 1571398/1571398 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 59966 event pairs, 1330 based on Foata normal form. 1/8986 useless extension candidates. Maximal degree in co-relation 91954. Up to 7907 conditions per place. [2024-06-21 19:13:55,467 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 501 selfloop transitions, 172 changer transitions 0/720 dead transitions. [2024-06-21 19:13:55,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 720 transitions, 13025 flow [2024-06-21 19:13:55,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:13:55,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:13:55,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 19:13:55,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 19:13:55,469 INFO L175 Difference]: Start difference. First operand has 409 places, 694 transitions, 11114 flow. Second operand 9 states and 157 transitions. [2024-06-21 19:13:55,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 720 transitions, 13025 flow [2024-06-21 19:14:01,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 720 transitions, 12653 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:01,923 INFO L231 Difference]: Finished difference. Result has 414 places, 700 transitions, 11338 flow [2024-06-21 19:14:01,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10744, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11338, PETRI_PLACES=414, PETRI_TRANSITIONS=700} [2024-06-21 19:14:01,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-21 19:14:01,923 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 700 transitions, 11338 flow [2024-06-21 19:14:01,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:01,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:01,923 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 19:14:01,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 19:14:01,924 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:14:01,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:01,924 INFO L85 PathProgramCache]: Analyzing trace with hash -757970972, now seen corresponding path program 7 times [2024-06-21 19:14:01,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:01,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388031612] [2024-06-21 19:14:01,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:01,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:02,855 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 19:14:02,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:02,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388031612] [2024-06-21 19:14:02,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388031612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:02,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:02,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:02,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768541637] [2024-06-21 19:14:02,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:02,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:02,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:02,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:02,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:02,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:14:02,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 700 transitions, 11338 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:02,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:02,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:14:02,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:05,512 INFO L124 PetriNetUnfolderBase]: 5676/9056 cut-off events. [2024-06-21 19:14:05,512 INFO L125 PetriNetUnfolderBase]: For 1609322/1609322 co-relation queries the response was YES. [2024-06-21 19:14:05,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92736 conditions, 9056 events. 5676/9056 cut-off events. For 1609322/1609322 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 60155 event pairs, 1306 based on Foata normal form. 1/9016 useless extension candidates. Maximal degree in co-relation 92532. Up to 7927 conditions per place. [2024-06-21 19:14:05,664 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 497 selfloop transitions, 183 changer transitions 0/727 dead transitions. [2024-06-21 19:14:05,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 727 transitions, 13290 flow [2024-06-21 19:14:05,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:14:05,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:14:05,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 19:14:05,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 19:14:05,665 INFO L175 Difference]: Start difference. First operand has 414 places, 700 transitions, 11338 flow. Second operand 9 states and 156 transitions. [2024-06-21 19:14:05,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 727 transitions, 13290 flow [2024-06-21 19:14:12,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 727 transitions, 12973 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:12,148 INFO L231 Difference]: Finished difference. Result has 419 places, 707 transitions, 11685 flow [2024-06-21 19:14:12,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11021, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11685, PETRI_PLACES=419, PETRI_TRANSITIONS=707} [2024-06-21 19:14:12,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 376 predicate places. [2024-06-21 19:14:12,149 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 707 transitions, 11685 flow [2024-06-21 19:14:12,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:12,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:12,149 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 19:14:12,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 19:14:12,149 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:14:12,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:12,149 INFO L85 PathProgramCache]: Analyzing trace with hash -997179806, now seen corresponding path program 4 times [2024-06-21 19:14:12,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:12,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522024374] [2024-06-21 19:14:12,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:12,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:13,161 INFO 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 19:14:13,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:13,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522024374] [2024-06-21 19:14:13,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522024374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:13,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:13,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:13,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389516861] [2024-06-21 19:14:13,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:13,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:13,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:13,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:13,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:13,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:14:13,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 707 transitions, 11685 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:13,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:13,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:14:13,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:15,583 INFO L124 PetriNetUnfolderBase]: 5737/9122 cut-off events. [2024-06-21 19:14:15,583 INFO L125 PetriNetUnfolderBase]: For 1635396/1635396 co-relation queries the response was YES. [2024-06-21 19:14:15,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94918 conditions, 9122 events. 5737/9122 cut-off events. For 1635396/1635396 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 60121 event pairs, 1527 based on Foata normal form. 2/9106 useless extension candidates. Maximal degree in co-relation 94711. Up to 8653 conditions per place. [2024-06-21 19:14:15,746 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 645 selfloop transitions, 74 changer transitions 0/723 dead transitions. [2024-06-21 19:14:15,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 723 transitions, 13194 flow [2024-06-21 19:14:15,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:15,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 19:14:15,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 19:14:15,747 INFO L175 Difference]: Start difference. First operand has 419 places, 707 transitions, 11685 flow. Second operand 8 states and 132 transitions. [2024-06-21 19:14:15,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 723 transitions, 13194 flow [2024-06-21 19:14:21,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 723 transitions, 12805 flow, removed 106 selfloop flow, removed 4 redundant places. [2024-06-21 19:14:21,405 INFO L231 Difference]: Finished difference. Result has 423 places, 707 transitions, 11454 flow [2024-06-21 19:14:21,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11296, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11454, PETRI_PLACES=423, PETRI_TRANSITIONS=707} [2024-06-21 19:14:21,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-21 19:14:21,405 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 707 transitions, 11454 flow [2024-06-21 19:14:21,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:21,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:21,406 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 19:14:21,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 19:14:21,406 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:14:21,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:21,407 INFO L85 PathProgramCache]: Analyzing trace with hash -642916952, now seen corresponding path program 8 times [2024-06-21 19:14:21,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:21,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559973987] [2024-06-21 19:14:21,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:21,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:22,641 INFO 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 19:14:22,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:22,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559973987] [2024-06-21 19:14:22,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559973987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:22,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:22,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:22,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722367637] [2024-06-21 19:14:22,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:22,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:22,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:22,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:22,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:22,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:14:22,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 707 transitions, 11454 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:22,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:22,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:14:22,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:25,172 INFO L124 PetriNetUnfolderBase]: 5717/9106 cut-off events. [2024-06-21 19:14:25,172 INFO L125 PetriNetUnfolderBase]: For 1704961/1704961 co-relation queries the response was YES. [2024-06-21 19:14:25,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96434 conditions, 9106 events. 5717/9106 cut-off events. For 1704961/1704961 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 60339 event pairs, 1321 based on Foata normal form. 1/9067 useless extension candidates. Maximal degree in co-relation 96225. Up to 7867 conditions per place. [2024-06-21 19:14:25,333 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 465 selfloop transitions, 224 changer transitions 0/736 dead transitions. [2024-06-21 19:14:25,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 736 transitions, 13825 flow [2024-06-21 19:14:25,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:25,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 19:14:25,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 19:14:25,335 INFO L175 Difference]: Start difference. First operand has 423 places, 707 transitions, 11454 flow. Second operand 8 states and 148 transitions. [2024-06-21 19:14:25,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 736 transitions, 13825 flow [2024-06-21 19:14:31,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 736 transitions, 13343 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-21 19:14:31,646 INFO L231 Difference]: Finished difference. Result has 422 places, 720 transitions, 11983 flow [2024-06-21 19:14:31,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10972, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11983, PETRI_PLACES=422, PETRI_TRANSITIONS=720} [2024-06-21 19:14:31,647 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-21 19:14:31,647 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 720 transitions, 11983 flow [2024-06-21 19:14:31,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:31,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:31,647 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 19:14:31,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 19:14:31,647 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:14:31,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:31,647 INFO L85 PathProgramCache]: Analyzing trace with hash 770928250, now seen corresponding path program 5 times [2024-06-21 19:14:31,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:31,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654180781] [2024-06-21 19:14:31,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:31,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:32,720 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 19:14:32,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:32,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654180781] [2024-06-21 19:14:32,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654180781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:32,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:32,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:32,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038938282] [2024-06-21 19:14:32,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:32,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:32,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:32,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:32,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:32,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:14:32,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 720 transitions, 11983 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:32,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:32,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:14:32,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:35,196 INFO L124 PetriNetUnfolderBase]: 5819/9236 cut-off events. [2024-06-21 19:14:35,196 INFO L125 PetriNetUnfolderBase]: For 1761883/1761883 co-relation queries the response was YES. [2024-06-21 19:14:35,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99744 conditions, 9236 events. 5819/9236 cut-off events. For 1761883/1761883 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 60897 event pairs, 1452 based on Foata normal form. 1/9219 useless extension candidates. Maximal degree in co-relation 99533. Up to 8702 conditions per place. [2024-06-21 19:14:35,368 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 632 selfloop transitions, 109 changer transitions 0/745 dead transitions. [2024-06-21 19:14:35,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 745 transitions, 14218 flow [2024-06-21 19:14:35,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:35,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:35,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 19:14:35,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 19:14:35,369 INFO L175 Difference]: Start difference. First operand has 422 places, 720 transitions, 11983 flow. Second operand 8 states and 135 transitions. [2024-06-21 19:14:35,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 745 transitions, 14218 flow [2024-06-21 19:14:43,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 745 transitions, 13851 flow, removed 114 selfloop flow, removed 4 redundant places. [2024-06-21 19:14:43,065 INFO L231 Difference]: Finished difference. Result has 428 places, 730 transitions, 12139 flow [2024-06-21 19:14:43,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11616, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12139, PETRI_PLACES=428, PETRI_TRANSITIONS=730} [2024-06-21 19:14:43,065 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-21 19:14:43,065 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 730 transitions, 12139 flow [2024-06-21 19:14:43,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:43,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:43,066 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 19:14:43,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 19:14:43,066 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:14:43,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:43,067 INFO L85 PathProgramCache]: Analyzing trace with hash 771343960, now seen corresponding path program 6 times [2024-06-21 19:14:43,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:43,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397848479] [2024-06-21 19:14:43,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:43,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:44,148 INFO 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 19:14:44,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:44,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397848479] [2024-06-21 19:14:44,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397848479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:44,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:44,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:44,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114721539] [2024-06-21 19:14:44,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:44,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:44,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:44,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:44,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:44,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:14:44,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 730 transitions, 12139 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:44,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:44,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:14:44,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:46,846 INFO L124 PetriNetUnfolderBase]: 5816/9231 cut-off events. [2024-06-21 19:14:46,846 INFO L125 PetriNetUnfolderBase]: For 1761402/1761402 co-relation queries the response was YES. [2024-06-21 19:14:46,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98320 conditions, 9231 events. 5816/9231 cut-off events. For 1761402/1761402 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 60838 event pairs, 1455 based on Foata normal form. 1/9214 useless extension candidates. Maximal degree in co-relation 98108. Up to 8699 conditions per place. [2024-06-21 19:14:47,026 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 625 selfloop transitions, 115 changer transitions 0/744 dead transitions. [2024-06-21 19:14:47,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 744 transitions, 13905 flow [2024-06-21 19:14:47,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:47,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:47,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 19:14:47,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 19:14:47,027 INFO L175 Difference]: Start difference. First operand has 428 places, 730 transitions, 12139 flow. Second operand 8 states and 134 transitions. [2024-06-21 19:14:47,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 744 transitions, 13905 flow [2024-06-21 19:14:52,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 744 transitions, 13647 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-21 19:14:52,925 INFO L231 Difference]: Finished difference. Result has 432 places, 730 transitions, 12117 flow [2024-06-21 19:14:52,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11881, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12117, PETRI_PLACES=432, PETRI_TRANSITIONS=730} [2024-06-21 19:14:52,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-21 19:14:52,925 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 730 transitions, 12117 flow [2024-06-21 19:14:52,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:52,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:52,926 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 19:14:52,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 19:14:52,926 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:14:52,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:52,926 INFO L85 PathProgramCache]: Analyzing trace with hash -642910442, now seen corresponding path program 9 times [2024-06-21 19:14:52,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:52,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438022964] [2024-06-21 19:14:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:52,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:54,183 INFO 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 19:14:54,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:54,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438022964] [2024-06-21 19:14:54,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438022964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:54,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:54,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:54,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817296287] [2024-06-21 19:14:54,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:54,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:54,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:54,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:54,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:54,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:14:54,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 730 transitions, 12117 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:54,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:54,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:14:54,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:57,122 INFO L124 PetriNetUnfolderBase]: 5740/9138 cut-off events. [2024-06-21 19:14:57,123 INFO L125 PetriNetUnfolderBase]: For 1785826/1785826 co-relation queries the response was YES. [2024-06-21 19:14:57,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97862 conditions, 9138 events. 5740/9138 cut-off events. For 1785826/1785826 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 60643 event pairs, 1320 based on Foata normal form. 1/9099 useless extension candidates. Maximal degree in co-relation 97649. Up to 7890 conditions per place. [2024-06-21 19:14:57,269 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 468 selfloop transitions, 233 changer transitions 0/751 dead transitions. [2024-06-21 19:14:57,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 751 transitions, 14243 flow [2024-06-21 19:14:57,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:14:57,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:14:57,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 19:14:57,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 19:14:57,270 INFO L175 Difference]: Start difference. First operand has 432 places, 730 transitions, 12117 flow. Second operand 9 states and 157 transitions. [2024-06-21 19:14:57,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 751 transitions, 14243 flow [2024-06-21 19:15:04,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 751 transitions, 14041 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 19:15:04,919 INFO L231 Difference]: Finished difference. Result has 435 places, 735 transitions, 12562 flow [2024-06-21 19:15:04,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11915, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12562, PETRI_PLACES=435, PETRI_TRANSITIONS=735} [2024-06-21 19:15:04,919 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-21 19:15:04,919 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 735 transitions, 12562 flow [2024-06-21 19:15:04,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:04,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:04,919 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 19:15:04,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 19:15:04,920 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:15:04,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:04,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1899855040, now seen corresponding path program 7 times [2024-06-21 19:15:04,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:04,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389499767] [2024-06-21 19:15:04,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:04,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:06,143 INFO 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 19:15:06,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:06,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389499767] [2024-06-21 19:15:06,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389499767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:06,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:06,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:06,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16163308] [2024-06-21 19:15:06,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:06,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:06,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:06,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:06,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:06,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:15:06,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 735 transitions, 12562 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:06,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:06,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:15:06,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:09,108 INFO L124 PetriNetUnfolderBase]: 5823/9248 cut-off events. [2024-06-21 19:15:09,109 INFO L125 PetriNetUnfolderBase]: For 1818782/1818788 co-relation queries the response was YES. [2024-06-21 19:15:09,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99171 conditions, 9248 events. 5823/9248 cut-off events. For 1818782/1818788 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 61062 event pairs, 1478 based on Foata normal form. 6/9232 useless extension candidates. Maximal degree in co-relation 98957. Up to 8360 conditions per place. [2024-06-21 19:15:09,373 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 549 selfloop transitions, 199 changer transitions 0/752 dead transitions. [2024-06-21 19:15:09,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 752 transitions, 14917 flow [2024-06-21 19:15:09,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:09,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:09,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 19:15:09,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 19:15:09,374 INFO L175 Difference]: Start difference. First operand has 435 places, 735 transitions, 12562 flow. Second operand 9 states and 145 transitions. [2024-06-21 19:15:09,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 752 transitions, 14917 flow [2024-06-21 19:15:16,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 752 transitions, 14475 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 19:15:16,718 INFO L231 Difference]: Finished difference. Result has 439 places, 739 transitions, 12610 flow [2024-06-21 19:15:16,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12120, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12610, PETRI_PLACES=439, PETRI_TRANSITIONS=739} [2024-06-21 19:15:16,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-21 19:15:16,718 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 739 transitions, 12610 flow [2024-06-21 19:15:16,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:16,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:16,719 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 19:15:16,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 19:15:16,719 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:15:16,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:16,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1899617704, now seen corresponding path program 10 times [2024-06-21 19:15:16,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:16,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156698254] [2024-06-21 19:15:16,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:16,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:17,902 INFO 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 19:15:17,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:17,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156698254] [2024-06-21 19:15:17,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156698254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:17,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:17,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:17,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563071430] [2024-06-21 19:15:17,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:17,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:17,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:17,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:17,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:17,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:15:17,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 739 transitions, 12610 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:17,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:17,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:15:17,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:20,946 INFO L124 PetriNetUnfolderBase]: 5792/9234 cut-off events. [2024-06-21 19:15:20,946 INFO L125 PetriNetUnfolderBase]: For 1881828/1881834 co-relation queries the response was YES. [2024-06-21 19:15:21,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100128 conditions, 9234 events. 5792/9234 cut-off events. For 1881828/1881834 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 61310 event pairs, 1416 based on Foata normal form. 3/9203 useless extension candidates. Maximal degree in co-relation 99913. Up to 7671 conditions per place. [2024-06-21 19:15:21,117 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 480 selfloop transitions, 234 changer transitions 0/765 dead transitions. [2024-06-21 19:15:21,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 765 transitions, 15060 flow [2024-06-21 19:15:21,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:21,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:21,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 19:15:21,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 19:15:21,118 INFO L175 Difference]: Start difference. First operand has 439 places, 739 transitions, 12610 flow. Second operand 9 states and 155 transitions. [2024-06-21 19:15:21,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 765 transitions, 15060 flow [2024-06-21 19:15:29,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 765 transitions, 14634 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 19:15:29,919 INFO L231 Difference]: Finished difference. Result has 442 places, 751 transitions, 13047 flow [2024-06-21 19:15:29,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12184, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13047, PETRI_PLACES=442, PETRI_TRANSITIONS=751} [2024-06-21 19:15:29,920 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-21 19:15:29,920 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 751 transitions, 13047 flow [2024-06-21 19:15:29,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:29,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:29,920 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 19:15:29,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 19:15:29,920 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:15:29,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:29,921 INFO L85 PathProgramCache]: Analyzing trace with hash 936804348, now seen corresponding path program 11 times [2024-06-21 19:15:29,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:29,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131080825] [2024-06-21 19:15:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:29,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:31,174 INFO 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 19:15:31,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:31,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131080825] [2024-06-21 19:15:31,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131080825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:31,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:31,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:31,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497238334] [2024-06-21 19:15:31,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:31,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:31,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:31,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:31,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:31,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:15:31,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 751 transitions, 13047 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:31,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:31,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:15:31,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:34,192 INFO L124 PetriNetUnfolderBase]: 5805/9252 cut-off events. [2024-06-21 19:15:34,192 INFO L125 PetriNetUnfolderBase]: For 1923657/1923663 co-relation queries the response was YES. [2024-06-21 19:15:34,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102205 conditions, 9252 events. 5805/9252 cut-off events. For 1923657/1923663 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 61509 event pairs, 1416 based on Foata normal form. 2/9220 useless extension candidates. Maximal degree in co-relation 101989. Up to 7684 conditions per place. [2024-06-21 19:15:34,355 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 461 selfloop transitions, 260 changer transitions 0/772 dead transitions. [2024-06-21 19:15:34,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 772 transitions, 15377 flow [2024-06-21 19:15:34,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:15:34,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:15:34,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 19:15:34,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:15:34,356 INFO L175 Difference]: Start difference. First operand has 442 places, 751 transitions, 13047 flow. Second operand 8 states and 144 transitions. [2024-06-21 19:15:34,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 772 transitions, 15377 flow [2024-06-21 19:15:42,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 772 transitions, 15034 flow, removed 109 selfloop flow, removed 4 redundant places. [2024-06-21 19:15:42,710 INFO L231 Difference]: Finished difference. Result has 446 places, 760 transitions, 13584 flow [2024-06-21 19:15:42,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12728, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13584, PETRI_PLACES=446, PETRI_TRANSITIONS=760} [2024-06-21 19:15:42,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-21 19:15:42,711 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 760 transitions, 13584 flow [2024-06-21 19:15:42,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:42,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:42,711 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 19:15:42,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 19:15:42,711 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:15:42,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:42,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1874078984, now seen corresponding path program 8 times [2024-06-21 19:15:42,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:42,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766071130] [2024-06-21 19:15:42,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:42,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:43,909 INFO 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 19:15:43,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:43,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766071130] [2024-06-21 19:15:43,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766071130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:43,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:43,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:43,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227108322] [2024-06-21 19:15:43,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:43,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:43,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:43,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:43,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:43,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:15:43,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 760 transitions, 13584 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:43,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:43,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:15:43,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:47,003 INFO L124 PetriNetUnfolderBase]: 5880/9328 cut-off events. [2024-06-21 19:15:47,004 INFO L125 PetriNetUnfolderBase]: For 1924240/1924246 co-relation queries the response was YES. [2024-06-21 19:15:47,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101269 conditions, 9328 events. 5880/9328 cut-off events. For 1924240/1924246 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 61605 event pairs, 1482 based on Foata normal form. 6/9312 useless extension candidates. Maximal degree in co-relation 101051. Up to 8437 conditions per place. [2024-06-21 19:15:47,259 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 550 selfloop transitions, 221 changer transitions 0/775 dead transitions. [2024-06-21 19:15:47,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 775 transitions, 15737 flow [2024-06-21 19:15:47,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:47,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 19:15:47,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-21 19:15:47,260 INFO L175 Difference]: Start difference. First operand has 446 places, 760 transitions, 13584 flow. Second operand 9 states and 143 transitions. [2024-06-21 19:15:47,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 775 transitions, 15737 flow [2024-06-21 19:15:56,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 775 transitions, 15398 flow, removed 92 selfloop flow, removed 3 redundant places. [2024-06-21 19:15:56,022 INFO L231 Difference]: Finished difference. Result has 452 places, 763 transitions, 13768 flow [2024-06-21 19:15:56,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13245, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13768, PETRI_PLACES=452, PETRI_TRANSITIONS=763} [2024-06-21 19:15:56,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 409 predicate places. [2024-06-21 19:15:56,022 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 763 transitions, 13768 flow [2024-06-21 19:15:56,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:56,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:56,022 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 19:15:56,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 19:15:56,022 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:15:56,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:56,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1989901026, now seen corresponding path program 9 times [2024-06-21 19:15:56,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:56,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942869626] [2024-06-21 19:15:56,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:56,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:57,207 INFO 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 19:15:57,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:57,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942869626] [2024-06-21 19:15:57,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942869626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:57,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:57,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:15:57,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276837930] [2024-06-21 19:15:57,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:57,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:15:57,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:57,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:15:57,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:15:57,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:15:57,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 763 transitions, 13768 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:57,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:57,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:15:57,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:00,463 INFO L124 PetriNetUnfolderBase]: 5901/9357 cut-off events. [2024-06-21 19:16:00,463 INFO L125 PetriNetUnfolderBase]: For 1947101/1947107 co-relation queries the response was YES. [2024-06-21 19:16:00,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102105 conditions, 9357 events. 5901/9357 cut-off events. For 1947101/1947107 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 61794 event pairs, 1482 based on Foata normal form. 5/9340 useless extension candidates. Maximal degree in co-relation 101885. Up to 8456 conditions per place. [2024-06-21 19:16:00,620 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 531 selfloop transitions, 247 changer transitions 0/782 dead transitions. [2024-06-21 19:16:00,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 782 transitions, 16054 flow [2024-06-21 19:16:00,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:16:00,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:16:00,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 19:16:00,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 19:16:00,621 INFO L175 Difference]: Start difference. First operand has 452 places, 763 transitions, 13768 flow. Second operand 9 states and 142 transitions. [2024-06-21 19:16:00,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 782 transitions, 16054 flow [2024-06-21 19:16:08,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 782 transitions, 15565 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 19:16:08,856 INFO L231 Difference]: Finished difference. Result has 456 places, 770 transitions, 14013 flow [2024-06-21 19:16:08,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13287, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14013, PETRI_PLACES=456, PETRI_TRANSITIONS=770} [2024-06-21 19:16:08,856 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 413 predicate places. [2024-06-21 19:16:08,856 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 770 transitions, 14013 flow [2024-06-21 19:16:08,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:08,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:08,857 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 19:16:08,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 19:16:08,857 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:16:08,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:08,857 INFO L85 PathProgramCache]: Analyzing trace with hash 2070320320, now seen corresponding path program 10 times [2024-06-21 19:16:08,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:08,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051494577] [2024-06-21 19:16:08,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:08,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:10,059 INFO 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 19:16:10,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:10,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051494577] [2024-06-21 19:16:10,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051494577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:10,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:10,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:16:10,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169262894] [2024-06-21 19:16:10,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:10,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:16:10,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:10,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:16:10,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:16:10,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:16:10,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 770 transitions, 14013 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:10,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:10,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:16:10,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:13,355 INFO L124 PetriNetUnfolderBase]: 5903/9360 cut-off events. [2024-06-21 19:16:13,355 INFO L125 PetriNetUnfolderBase]: For 1974752/1974758 co-relation queries the response was YES. [2024-06-21 19:16:13,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102287 conditions, 9360 events. 5903/9360 cut-off events. For 1974752/1974758 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 61764 event pairs, 1482 based on Foata normal form. 6/9344 useless extension candidates. Maximal degree in co-relation 102065. Up to 8457 conditions per place. [2024-06-21 19:16:13,532 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 570 selfloop transitions, 211 changer transitions 0/785 dead transitions. [2024-06-21 19:16:13,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 785 transitions, 16202 flow [2024-06-21 19:16:13,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:16:13,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:16:13,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 19:16:13,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 19:16:13,533 INFO L175 Difference]: Start difference. First operand has 456 places, 770 transitions, 14013 flow. Second operand 9 states and 144 transitions. [2024-06-21 19:16:13,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 785 transitions, 16202 flow [2024-06-21 19:16:21,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 785 transitions, 15827 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 19:16:21,656 INFO L231 Difference]: Finished difference. Result has 460 places, 773 transitions, 14148 flow [2024-06-21 19:16:21,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13640, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14148, PETRI_PLACES=460, PETRI_TRANSITIONS=773} [2024-06-21 19:16:21,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-21 19:16:21,656 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 773 transitions, 14148 flow [2024-06-21 19:16:21,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:21,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:21,657 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 19:16:21,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 19:16:21,657 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:16:21,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:21,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1698800018, now seen corresponding path program 12 times [2024-06-21 19:16:21,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:21,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641305049] [2024-06-21 19:16:21,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:21,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:22,852 INFO 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 19:16:22,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:22,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641305049] [2024-06-21 19:16:22,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641305049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:22,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:22,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:16:22,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120527320] [2024-06-21 19:16:22,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:22,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:16:22,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:22,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:16:22,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:16:22,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:16:22,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 773 transitions, 14148 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:22,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:22,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:16:22,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:26,046 INFO L124 PetriNetUnfolderBase]: 5851/9316 cut-off events. [2024-06-21 19:16:26,047 INFO L125 PetriNetUnfolderBase]: For 2018228/2018234 co-relation queries the response was YES. [2024-06-21 19:16:26,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102744 conditions, 9316 events. 5851/9316 cut-off events. For 2018228/2018234 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 61824 event pairs, 1416 based on Foata normal form. 2/9284 useless extension candidates. Maximal degree in co-relation 102521. Up to 7647 conditions per place. [2024-06-21 19:16:26,205 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 489 selfloop transitions, 254 changer transitions 0/798 dead transitions. [2024-06-21 19:16:26,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 798 transitions, 16866 flow [2024-06-21 19:16:26,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:16:26,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:16:26,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 19:16:26,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 19:16:26,207 INFO L175 Difference]: Start difference. First operand has 460 places, 773 transitions, 14148 flow. Second operand 9 states and 156 transitions. [2024-06-21 19:16:26,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 798 transitions, 16866 flow [2024-06-21 19:16:34,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 798 transitions, 16434 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 19:16:34,855 INFO L231 Difference]: Finished difference. Result has 465 places, 784 transitions, 14665 flow [2024-06-21 19:16:34,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13716, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14665, PETRI_PLACES=465, PETRI_TRANSITIONS=784} [2024-06-21 19:16:34,856 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-21 19:16:34,856 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 784 transitions, 14665 flow [2024-06-21 19:16:34,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:34,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:34,856 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 19:16:34,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 19:16:34,857 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:16:34,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:34,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1866650366, now seen corresponding path program 11 times [2024-06-21 19:16:34,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:34,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221311232] [2024-06-21 19:16:34,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:34,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:36,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:36,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221311232] [2024-06-21 19:16:36,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221311232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:36,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:36,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:16:36,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133111197] [2024-06-21 19:16:36,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:36,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:16:36,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:36,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:16:36,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:16:36,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:16:36,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 784 transitions, 14665 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:36,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:36,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:16:36,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand