./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.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/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 00:30:27,626 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:30:27,674 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:30:27,679 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:30:27,679 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:30:27,706 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:30:27,706 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:30:27,707 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:30:27,707 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:30:27,707 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:30:27,708 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:30:27,708 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:30:27,709 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:30:27,709 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:30:27,709 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:30:27,710 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:30:27,710 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:30:27,710 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:30:27,711 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:30:27,711 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:30:27,711 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:30:27,714 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:30:27,714 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:30:27,715 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:30:27,715 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:30:27,715 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:30:27,716 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:30:27,716 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:30:27,716 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:30:27,717 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:30:27,717 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:30:27,717 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:30:27,718 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:30:27,718 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:30:27,718 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:30:27,718 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:30:27,719 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:30:27,719 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:30:27,719 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:30:27,719 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:30:27,720 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:30:27,723 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:30:27,723 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:30:27,724 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 00:30:28,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:30:28,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:30:28,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:30:28,068 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:30:28,068 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:30:28,070 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-28 00:30:29,247 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:30:29,567 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:30:29,568 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-28 00:30:29,585 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aa709325/f65eccda4bb94a8da4790680156e15e2/FLAG575a8e49a [2024-06-28 00:30:29,599 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aa709325/f65eccda4bb94a8da4790680156e15e2 [2024-06-28 00:30:29,601 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:30:29,602 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:30:29,602 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-28 00:30:29,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:30:29,696 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:30:29,698 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:30:29,698 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:30:29,704 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:30:29,705 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:30:29" (1/2) ... [2024-06-28 00:30:29,706 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d972008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:30:29, skipping insertion in model container [2024-06-28 00:30:29,707 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:30:29" (1/2) ... [2024-06-28 00:30:29,709 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@35070808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:30:29, skipping insertion in model container [2024-06-28 00:30:29,710 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:30:29" (2/2) ... [2024-06-28 00:30:29,710 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d972008 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:30:29, skipping insertion in model container [2024-06-28 00:30:29,711 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:30:29" (2/2) ... [2024-06-28 00:30:29,711 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:30:29,741 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:30:29,742 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (0LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )__unbuffered_p0_EAX - (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-28 00:30:29,742 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (0LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )__unbuffered_p0_EAX - (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-28 00:30:29,742 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (0LL - (long long )x) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$r_buff0_thd2 >= 0LL) && (0LL - (long long )x$mem_tmp) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )__unbuffered_p0_EAX - (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-28 00:30:29,743 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:30:29,743 INFO L106 edCorrectnessWitness]: ghost_update [L834-L834] multithreaded = 1; [2024-06-28 00:30:29,795 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:30:30,178 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:30:30,196 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:30:30,367 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:30:30,405 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:30:30,406 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:30:30 WrapperNode [2024-06-28 00:30:30,406 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:30:30,407 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:30:30,407 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:30:30,407 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:30:30,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:30:30" (1/1) ... [2024-06-28 00:30:30,450 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:30:30" (1/1) ... [2024-06-28 00:30:30,511 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-28 00:30:30,512 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:30:30,513 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:30:30,513 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:30:30,513 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:30:30,525 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:30:30" (1/1) ... [2024-06-28 00:30:30,525 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:30:30" (1/1) ... [2024-06-28 00:30:30,530 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:30:30" (1/1) ... [2024-06-28 00:30:30,567 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]. [2024-06-28 00:30:30,567 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:30:30" (1/1) ... [2024-06-28 00:30:30,568 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:30:30" (1/1) ... [2024-06-28 00:30:30,579 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:30:30" (1/1) ... [2024-06-28 00:30:30,581 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:30:30" (1/1) ... [2024-06-28 00:30:30,584 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:30:30" (1/1) ... [2024-06-28 00:30:30,587 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:30:30" (1/1) ... [2024-06-28 00:30:30,601 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:30:30,602 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:30:30,602 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:30:30,602 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:30:30,603 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:30:30" (1/1) ... [2024-06-28 00:30:30,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:30:30,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:30:30,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 00:30:30,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 00:30:30,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:30:30,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:30:30,677 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:30:30,677 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:30:30,678 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:30:30,678 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:30:30,678 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:30:30,678 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:30:30,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:30:30,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:30:30,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:30:30,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:30:30,681 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:30:30,890 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:30:30,892 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:30:31,389 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:30:31,390 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:30:31,586 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:30:31,586 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:30:31,586 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:30:31 BoogieIcfgContainer [2024-06-28 00:30:31,587 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:30:31,591 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:30:31,591 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:30:31,594 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:30:31,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:30:29" (1/4) ... [2024-06-28 00:30:31,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1a13a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:30:31, skipping insertion in model container [2024-06-28 00:30:31,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:30:29" (2/4) ... [2024-06-28 00:30:31,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1a13a6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:30:31, skipping insertion in model container [2024-06-28 00:30:31,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:30:30" (3/4) ... [2024-06-28 00:30:31,599 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1a13a6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:30:31, skipping insertion in model container [2024-06-28 00:30:31,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:30:31" (4/4) ... [2024-06-28 00:30:31,601 INFO L112 eAbstractionObserver]: Analyzing ICFG safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-28 00:30:31,619 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:30:31,619 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 00:30:31,619 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:30:31,685 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:30:31,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-28 00:30:31,768 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-28 00:30:31,768 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:30:31,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 00:30:31,771 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-28 00:30:31,775 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-28 00:30:31,790 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:30:31,798 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;@37f555a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:30:31,799 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 00:30:31,805 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:30:31,806 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 00:30:31,806 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:30:31,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:31,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:30:31,807 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:30:31,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:31,816 INFO L85 PathProgramCache]: Analyzing trace with hash 363617411, now seen corresponding path program 1 times [2024-06-28 00:30:31,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:31,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356238892] [2024-06-28 00:30:31,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:31,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:33,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:33,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356238892] [2024-06-28 00:30:33,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356238892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:33,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:33,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:30:33,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435521865] [2024-06-28 00:30:33,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:33,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:30:33,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:33,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:30:33,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:30:33,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-28 00:30:33,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:33,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:33,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-28 00:30:33,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:33,941 INFO L124 PetriNetUnfolderBase]: 942/1465 cut-off events. [2024-06-28 00:30:33,941 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-28 00:30:33,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2981 conditions, 1465 events. 942/1465 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7325 event pairs, 546 based on Foata normal form. 2/1426 useless extension candidates. Maximal degree in co-relation 2969. Up to 1428 conditions per place. [2024-06-28 00:30:33,956 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 31 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-28 00:30:33,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 171 flow [2024-06-28 00:30:33,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:30:33,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:30:33,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-28 00:30:33,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-28 00:30:33,969 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 80 transitions. [2024-06-28 00:30:33,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 171 flow [2024-06-28 00:30:33,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:30:33,974 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-28 00:30:33,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-28 00:30:33,979 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-28 00:30:33,980 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-28 00:30:33,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:33,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:33,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:30:33,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:30:33,981 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)] === [2024-06-28 00:30:33,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:33,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1544011682, now seen corresponding path program 1 times [2024-06-28 00:30:33,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:33,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047927510] [2024-06-28 00:30:33,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:33,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:35,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:35,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047927510] [2024-06-28 00:30:35,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047927510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:35,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:35,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:30:35,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573508229] [2024-06-28 00:30:35,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:35,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:30:35,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:35,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:30:35,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:30:35,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-28 00:30:35,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:35,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:35,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-28 00:30:35,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:35,547 INFO L124 PetriNetUnfolderBase]: 1140/1744 cut-off events. [2024-06-28 00:30:35,547 INFO L125 PetriNetUnfolderBase]: For 275/275 co-relation queries the response was YES. [2024-06-28 00:30:35,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4035 conditions, 1744 events. 1140/1744 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8375 event pairs, 658 based on Foata normal form. 3/1744 useless extension candidates. Maximal degree in co-relation 4023. Up to 1700 conditions per place. [2024-06-28 00:30:35,562 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 41 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-28 00:30:35,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 252 flow [2024-06-28 00:30:35,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:30:35,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:30:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-28 00:30:35,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-28 00:30:35,568 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 100 transitions. [2024-06-28 00:30:35,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 252 flow [2024-06-28 00:30:35,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:30:35,570 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-28 00:30:35,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-28 00:30:35,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-28 00:30:35,571 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-28 00:30:35,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:35,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:35,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:30:35,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:30:35,575 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)] === [2024-06-28 00:30:35,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:35,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2031541953, now seen corresponding path program 1 times [2024-06-28 00:30:35,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:35,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59517514] [2024-06-28 00:30:35,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:35,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:37,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:37,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59517514] [2024-06-28 00:30:37,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59517514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:37,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:37,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:30:37,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547043828] [2024-06-28 00:30:37,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:37,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:30:37,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:37,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:30:37,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:30:37,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-28 00:30:37,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:37,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:37,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-28 00:30:37,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:37,713 INFO L124 PetriNetUnfolderBase]: 1134/1735 cut-off events. [2024-06-28 00:30:37,713 INFO L125 PetriNetUnfolderBase]: For 903/911 co-relation queries the response was YES. [2024-06-28 00:30:37,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4497 conditions, 1735 events. 1134/1735 cut-off events. For 903/911 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8327 event pairs, 533 based on Foata normal form. 9/1741 useless extension candidates. Maximal degree in co-relation 4482. Up to 1676 conditions per place. [2024-06-28 00:30:37,726 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 48 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-28 00:30:37,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 65 transitions, 334 flow [2024-06-28 00:30:37,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:30:37,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:30:37,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-28 00:30:37,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 00:30:37,734 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 123 transitions. [2024-06-28 00:30:37,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 65 transitions, 334 flow [2024-06-28 00:30:37,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 332 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-28 00:30:37,738 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 198 flow [2024-06-28 00:30:37,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-28 00:30:37,739 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-28 00:30:37,739 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 198 flow [2024-06-28 00:30:37,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:37,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:37,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:30:37,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:30:37,740 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:30:37,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:37,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1973259754, now seen corresponding path program 1 times [2024-06-28 00:30:37,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:37,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899537321] [2024-06-28 00:30:37,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:37,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:38,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:38,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899537321] [2024-06-28 00:30:38,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899537321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:38,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:38,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:30:38,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182239419] [2024-06-28 00:30:38,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:38,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:30:38,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:38,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:30:38,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:30:39,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:30:39,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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) [2024-06-28 00:30:39,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:39,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:30:39,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:39,486 INFO L124 PetriNetUnfolderBase]: 1134/1735 cut-off events. [2024-06-28 00:30:39,486 INFO L125 PetriNetUnfolderBase]: For 1679/1687 co-relation queries the response was YES. [2024-06-28 00:30:39,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4978 conditions, 1735 events. 1134/1735 cut-off events. For 1679/1687 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8193 event pairs, 519 based on Foata normal form. 9/1741 useless extension candidates. Maximal degree in co-relation 4959. Up to 1691 conditions per place. [2024-06-28 00:30:39,499 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 44 selfloop transitions, 13 changer transitions 0/63 dead transitions. [2024-06-28 00:30:39,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 63 transitions, 378 flow [2024-06-28 00:30:39,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:30:39,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:30:39,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-28 00:30:39,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024390243902439 [2024-06-28 00:30:39,503 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 198 flow. Second operand 5 states and 103 transitions. [2024-06-28 00:30:39,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 63 transitions, 378 flow [2024-06-28 00:30:39,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 63 transitions, 354 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 00:30:39,511 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 275 flow [2024-06-28 00:30:39,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=275, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2024-06-28 00:30:39,512 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-28 00:30:39,513 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 275 flow [2024-06-28 00:30:39,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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) [2024-06-28 00:30:39,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:39,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:30:39,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:30:39,514 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:30:39,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:39,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1898268192, now seen corresponding path program 1 times [2024-06-28 00:30:39,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:39,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958162751] [2024-06-28 00:30:39,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:39,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:41,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:41,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958162751] [2024-06-28 00:30:41,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958162751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:41,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:41,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:30:41,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226075049] [2024-06-28 00:30:41,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:41,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:30:41,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:41,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:30:41,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:30:41,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-28 00:30:41,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 275 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-28 00:30:41,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:41,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-28 00:30:41,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:41,817 INFO L124 PetriNetUnfolderBase]: 1125/1720 cut-off events. [2024-06-28 00:30:41,817 INFO L125 PetriNetUnfolderBase]: For 2464/2476 co-relation queries the response was YES. [2024-06-28 00:30:41,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5464 conditions, 1720 events. 1125/1720 cut-off events. For 2464/2476 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8080 event pairs, 378 based on Foata normal form. 15/1732 useless extension candidates. Maximal degree in co-relation 5441. Up to 1631 conditions per place. [2024-06-28 00:30:41,831 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 59 selfloop transitions, 13 changer transitions 0/79 dead transitions. [2024-06-28 00:30:41,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 79 transitions, 495 flow [2024-06-28 00:30:41,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:30:41,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:30:41,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-28 00:30:41,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-28 00:30:41,834 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 275 flow. Second operand 6 states and 142 transitions. [2024-06-28 00:30:41,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 79 transitions, 495 flow [2024-06-28 00:30:41,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 489 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-28 00:30:41,839 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 314 flow [2024-06-28 00:30:41,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=314, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-06-28 00:30:41,840 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-28 00:30:41,840 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 314 flow [2024-06-28 00:30:41,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-28 00:30:41,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:41,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:30:41,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:30:41,841 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:30:41,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:41,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1032572233, now seen corresponding path program 1 times [2024-06-28 00:30:41,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:41,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694458458] [2024-06-28 00:30:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:41,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:43,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:43,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694458458] [2024-06-28 00:30:43,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694458458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:43,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:43,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:30:43,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661505569] [2024-06-28 00:30:43,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:43,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:30:43,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:43,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:30:43,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:30:43,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:30:43,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:43,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:43,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:30:43,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:43,816 INFO L124 PetriNetUnfolderBase]: 1261/1943 cut-off events. [2024-06-28 00:30:43,816 INFO L125 PetriNetUnfolderBase]: For 4314/4346 co-relation queries the response was YES. [2024-06-28 00:30:43,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6426 conditions, 1943 events. 1261/1943 cut-off events. For 4314/4346 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9542 event pairs, 534 based on Foata normal form. 2/1911 useless extension candidates. Maximal degree in co-relation 6399. Up to 1831 conditions per place. [2024-06-28 00:30:43,834 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 53 selfloop transitions, 13 changer transitions 0/77 dead transitions. [2024-06-28 00:30:43,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 532 flow [2024-06-28 00:30:43,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:30:43,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:30:43,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-28 00:30:43,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-28 00:30:43,837 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 314 flow. Second operand 6 states and 118 transitions. [2024-06-28 00:30:43,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 532 flow [2024-06-28 00:30:43,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 77 transitions, 493 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 00:30:43,845 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 383 flow [2024-06-28 00:30:43,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=383, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-28 00:30:43,847 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-28 00:30:43,848 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 383 flow [2024-06-28 00:30:43,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:43,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:43,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:30:43,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:30:43,849 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:30:43,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:43,849 INFO L85 PathProgramCache]: Analyzing trace with hash 599554585, now seen corresponding path program 1 times [2024-06-28 00:30:43,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:43,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765083795] [2024-06-28 00:30:43,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:43,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:45,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:45,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765083795] [2024-06-28 00:30:45,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765083795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:45,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:45,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:30:45,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638585624] [2024-06-28 00:30:45,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:45,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:30:45,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:45,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:30:45,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:30:45,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:30:45,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 383 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:45,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:45,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:30:45,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:45,829 INFO L124 PetriNetUnfolderBase]: 1290/1985 cut-off events. [2024-06-28 00:30:45,829 INFO L125 PetriNetUnfolderBase]: For 5501/5534 co-relation queries the response was YES. [2024-06-28 00:30:45,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7146 conditions, 1985 events. 1290/1985 cut-off events. For 5501/5534 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9740 event pairs, 589 based on Foata normal form. 10/1980 useless extension candidates. Maximal degree in co-relation 7114. Up to 1862 conditions per place. [2024-06-28 00:30:45,854 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 58 selfloop transitions, 24 changer transitions 0/91 dead transitions. [2024-06-28 00:30:45,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 91 transitions, 657 flow [2024-06-28 00:30:45,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:30:45,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:30:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-28 00:30:45,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-28 00:30:45,856 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 383 flow. Second operand 7 states and 136 transitions. [2024-06-28 00:30:45,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 91 transitions, 657 flow [2024-06-28 00:30:45,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 91 transitions, 650 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-28 00:30:45,863 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 504 flow [2024-06-28 00:30:45,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=504, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2024-06-28 00:30:45,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-28 00:30:45,865 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 504 flow [2024-06-28 00:30:45,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:45,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:45,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:30:45,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:30:45,865 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:30:45,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:45,866 INFO L85 PathProgramCache]: Analyzing trace with hash 608671375, now seen corresponding path program 2 times [2024-06-28 00:30:45,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:45,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54028863] [2024-06-28 00:30:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:45,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:47,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:47,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54028863] [2024-06-28 00:30:47,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54028863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:47,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:47,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:30:47,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606911465] [2024-06-28 00:30:47,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:47,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:30:47,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:47,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:30:47,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:30:47,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:30:47,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 504 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:47,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:47,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:30:47,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:47,892 INFO L124 PetriNetUnfolderBase]: 1341/2056 cut-off events. [2024-06-28 00:30:47,893 INFO L125 PetriNetUnfolderBase]: For 7597/7636 co-relation queries the response was YES. [2024-06-28 00:30:47,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8235 conditions, 2056 events. 1341/2056 cut-off events. For 7597/7636 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10048 event pairs, 526 based on Foata normal form. 19/2058 useless extension candidates. Maximal degree in co-relation 8199. Up to 1890 conditions per place. [2024-06-28 00:30:47,919 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 57 selfloop transitions, 34 changer transitions 0/100 dead transitions. [2024-06-28 00:30:47,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 829 flow [2024-06-28 00:30:47,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:30:47,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:30:47,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-28 00:30:47,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-28 00:30:47,922 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 504 flow. Second operand 6 states and 126 transitions. [2024-06-28 00:30:47,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 829 flow [2024-06-28 00:30:47,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 100 transitions, 794 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-28 00:30:47,933 INFO L231 Difference]: Finished difference. Result has 76 places, 83 transitions, 645 flow [2024-06-28 00:30:47,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=645, PETRI_PLACES=76, PETRI_TRANSITIONS=83} [2024-06-28 00:30:47,936 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-28 00:30:47,936 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 83 transitions, 645 flow [2024-06-28 00:30:47,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:47,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:47,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:30:47,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:30:47,937 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)] === [2024-06-28 00:30:47,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:47,938 INFO L85 PathProgramCache]: Analyzing trace with hash -891566859, now seen corresponding path program 3 times [2024-06-28 00:30:47,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:47,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901693267] [2024-06-28 00:30:47,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:47,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:47,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:49,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:49,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901693267] [2024-06-28 00:30:49,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901693267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:49,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:49,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:30:49,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233616851] [2024-06-28 00:30:49,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:49,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:30:49,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:49,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:30:49,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:30:49,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:30:49,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 83 transitions, 645 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:49,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:49,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:30:49,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:49,688 INFO L124 PetriNetUnfolderBase]: 1326/2044 cut-off events. [2024-06-28 00:30:49,688 INFO L125 PetriNetUnfolderBase]: For 10412/10464 co-relation queries the response was YES. [2024-06-28 00:30:49,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8850 conditions, 2044 events. 1326/2044 cut-off events. For 10412/10464 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9915 event pairs, 520 based on Foata normal form. 22/2056 useless extension candidates. Maximal degree in co-relation 8811. Up to 1942 conditions per place. [2024-06-28 00:30:49,704 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 80 selfloop transitions, 24 changer transitions 0/113 dead transitions. [2024-06-28 00:30:49,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 113 transitions, 989 flow [2024-06-28 00:30:49,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:30:49,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:30:49,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-28 00:30:49,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843205574912892 [2024-06-28 00:30:49,706 INFO L175 Difference]: Start difference. First operand has 76 places, 83 transitions, 645 flow. Second operand 7 states and 139 transitions. [2024-06-28 00:30:49,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 113 transitions, 989 flow [2024-06-28 00:30:49,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 113 transitions, 924 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 00:30:49,723 INFO L231 Difference]: Finished difference. Result has 81 places, 93 transitions, 744 flow [2024-06-28 00:30:49,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=744, PETRI_PLACES=81, PETRI_TRANSITIONS=93} [2024-06-28 00:30:49,725 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-28 00:30:49,725 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 93 transitions, 744 flow [2024-06-28 00:30:49,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:49,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:49,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:30:49,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:30:49,725 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)] === [2024-06-28 00:30:49,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:49,726 INFO L85 PathProgramCache]: Analyzing trace with hash 2072943573, now seen corresponding path program 1 times [2024-06-28 00:30:49,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:49,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032150673] [2024-06-28 00:30:49,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:49,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:51,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:51,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032150673] [2024-06-28 00:30:51,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032150673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:51,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:51,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:30:51,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397846603] [2024-06-28 00:30:51,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:51,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:30:51,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:51,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:30:51,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:30:51,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:30:51,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 93 transitions, 744 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:51,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:51,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:30:51,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:52,388 INFO L124 PetriNetUnfolderBase]: 1392/2141 cut-off events. [2024-06-28 00:30:52,389 INFO L125 PetriNetUnfolderBase]: For 12059/12103 co-relation queries the response was YES. [2024-06-28 00:30:52,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9251 conditions, 2141 events. 1392/2141 cut-off events. For 12059/12103 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10698 event pairs, 556 based on Foata normal form. 2/2096 useless extension candidates. Maximal degree in co-relation 9210. Up to 1993 conditions per place. [2024-06-28 00:30:52,410 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 79 selfloop transitions, 16 changer transitions 0/114 dead transitions. [2024-06-28 00:30:52,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 114 transitions, 1002 flow [2024-06-28 00:30:52,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:30:52,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:30:52,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 00:30:52,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-28 00:30:52,413 INFO L175 Difference]: Start difference. First operand has 81 places, 93 transitions, 744 flow. Second operand 8 states and 147 transitions. [2024-06-28 00:30:52,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 114 transitions, 1002 flow [2024-06-28 00:30:52,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 114 transitions, 954 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 00:30:52,433 INFO L231 Difference]: Finished difference. Result has 85 places, 96 transitions, 756 flow [2024-06-28 00:30:52,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=756, PETRI_PLACES=85, PETRI_TRANSITIONS=96} [2024-06-28 00:30:52,435 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-28 00:30:52,435 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 96 transitions, 756 flow [2024-06-28 00:30:52,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:52,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:52,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:30:52,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:30:52,436 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)] === [2024-06-28 00:30:52,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:52,436 INFO L85 PathProgramCache]: Analyzing trace with hash -370188188, now seen corresponding path program 1 times [2024-06-28 00:30:52,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:52,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754346215] [2024-06-28 00:30:52,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:52,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:53,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:53,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754346215] [2024-06-28 00:30:53,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754346215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:53,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:53,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:30:53,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895869905] [2024-06-28 00:30:53,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:53,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:30:53,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:53,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:30:53,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:30:53,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:30:53,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 96 transitions, 756 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:53,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:53,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:30:53,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:54,571 INFO L124 PetriNetUnfolderBase]: 1438/2189 cut-off events. [2024-06-28 00:30:54,572 INFO L125 PetriNetUnfolderBase]: For 12921/12921 co-relation queries the response was YES. [2024-06-28 00:30:54,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9875 conditions, 2189 events. 1438/2189 cut-off events. For 12921/12921 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10486 event pairs, 618 based on Foata normal form. 2/2185 useless extension candidates. Maximal degree in co-relation 9833. Up to 2095 conditions per place. [2024-06-28 00:30:54,588 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 102 selfloop transitions, 24 changer transitions 0/131 dead transitions. [2024-06-28 00:30:54,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 131 transitions, 1190 flow [2024-06-28 00:30:54,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:30:54,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:30:54,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 00:30:54,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-28 00:30:54,591 INFO L175 Difference]: Start difference. First operand has 85 places, 96 transitions, 756 flow. Second operand 8 states and 143 transitions. [2024-06-28 00:30:54,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 131 transitions, 1190 flow [2024-06-28 00:30:54,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 131 transitions, 1152 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 00:30:54,606 INFO L231 Difference]: Finished difference. Result has 90 places, 113 transitions, 948 flow [2024-06-28 00:30:54,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=948, PETRI_PLACES=90, PETRI_TRANSITIONS=113} [2024-06-28 00:30:54,607 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-28 00:30:54,608 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 113 transitions, 948 flow [2024-06-28 00:30:54,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:54,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:54,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:30:54,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:30:54,609 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)] === [2024-06-28 00:30:54,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:54,610 INFO L85 PathProgramCache]: Analyzing trace with hash -163534748, now seen corresponding path program 2 times [2024-06-28 00:30:54,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:54,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431399302] [2024-06-28 00:30:54,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:54,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:56,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:56,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431399302] [2024-06-28 00:30:56,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431399302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:56,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:56,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:30:56,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645526031] [2024-06-28 00:30:56,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:56,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:30:56,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:56,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:30:56,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:30:56,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:30:56,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 113 transitions, 948 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:56,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:56,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:30:56,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:56,823 INFO L124 PetriNetUnfolderBase]: 1465/2231 cut-off events. [2024-06-28 00:30:56,823 INFO L125 PetriNetUnfolderBase]: For 15864/15864 co-relation queries the response was YES. [2024-06-28 00:30:56,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10680 conditions, 2231 events. 1465/2231 cut-off events. For 15864/15864 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10773 event pairs, 622 based on Foata normal form. 2/2225 useless extension candidates. Maximal degree in co-relation 10635. Up to 2067 conditions per place. [2024-06-28 00:30:56,846 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 105 selfloop transitions, 38 changer transitions 0/148 dead transitions. [2024-06-28 00:30:56,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 148 transitions, 1484 flow [2024-06-28 00:30:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:30:56,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:30:56,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-28 00:30:56,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843205574912892 [2024-06-28 00:30:56,849 INFO L175 Difference]: Start difference. First operand has 90 places, 113 transitions, 948 flow. Second operand 7 states and 139 transitions. [2024-06-28 00:30:56,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 148 transitions, 1484 flow [2024-06-28 00:30:56,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 148 transitions, 1460 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-28 00:30:56,868 INFO L231 Difference]: Finished difference. Result has 98 places, 125 transitions, 1137 flow [2024-06-28 00:30:56,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1137, PETRI_PLACES=98, PETRI_TRANSITIONS=125} [2024-06-28 00:30:56,868 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-28 00:30:56,868 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 125 transitions, 1137 flow [2024-06-28 00:30:56,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:56,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:56,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:30:56,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:30:56,869 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)] === [2024-06-28 00:30:56,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:56,870 INFO L85 PathProgramCache]: Analyzing trace with hash -164457130, now seen corresponding path program 3 times [2024-06-28 00:30:56,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:56,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040696396] [2024-06-28 00:30:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:56,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:30:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:30:58,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:30:58,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040696396] [2024-06-28 00:30:58,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040696396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:30:58,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:30:58,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:30:58,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473463184] [2024-06-28 00:30:58,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:30:58,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:30:58,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:30:58,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:30:58,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:30:58,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:30:58,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 125 transitions, 1137 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:58,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:30:58,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:30:58,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:30:59,040 INFO L124 PetriNetUnfolderBase]: 1460/2224 cut-off events. [2024-06-28 00:30:59,040 INFO L125 PetriNetUnfolderBase]: For 19053/19053 co-relation queries the response was YES. [2024-06-28 00:30:59,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11309 conditions, 2224 events. 1460/2224 cut-off events. For 19053/19053 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10758 event pairs, 622 based on Foata normal form. 2/2218 useless extension candidates. Maximal degree in co-relation 11259. Up to 2062 conditions per place. [2024-06-28 00:30:59,064 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 100 selfloop transitions, 43 changer transitions 0/148 dead transitions. [2024-06-28 00:30:59,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 148 transitions, 1560 flow [2024-06-28 00:30:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:30:59,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:30:59,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-28 00:30:59,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-28 00:30:59,067 INFO L175 Difference]: Start difference. First operand has 98 places, 125 transitions, 1137 flow. Second operand 7 states and 136 transitions. [2024-06-28 00:30:59,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 148 transitions, 1560 flow [2024-06-28 00:30:59,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 148 transitions, 1500 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-28 00:30:59,097 INFO L231 Difference]: Finished difference. Result has 104 places, 128 transitions, 1221 flow [2024-06-28 00:30:59,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1221, PETRI_PLACES=104, PETRI_TRANSITIONS=128} [2024-06-28 00:30:59,099 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-28 00:30:59,099 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 128 transitions, 1221 flow [2024-06-28 00:30:59,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:30:59,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:30:59,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:30:59,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:30:59,100 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)] === [2024-06-28 00:30:59,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:30:59,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1868768156, now seen corresponding path program 4 times [2024-06-28 00:30:59,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:30:59,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828998488] [2024-06-28 00:30:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:30:59,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:30:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:00,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:00,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:00,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828998488] [2024-06-28 00:31:00,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828998488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:00,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:00,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:31:00,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827962556] [2024-06-28 00:31:00,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:00,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:31:00,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:00,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:31:00,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:31:00,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:31:00,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 128 transitions, 1221 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:00,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:00,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:31:00,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:00,973 INFO L124 PetriNetUnfolderBase]: 1462/2240 cut-off events. [2024-06-28 00:31:00,974 INFO L125 PetriNetUnfolderBase]: For 20959/20959 co-relation queries the response was YES. [2024-06-28 00:31:00,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11581 conditions, 2240 events. 1462/2240 cut-off events. For 20959/20959 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10796 event pairs, 556 based on Foata normal form. 2/2239 useless extension candidates. Maximal degree in co-relation 11528. Up to 2128 conditions per place. [2024-06-28 00:31:00,999 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 122 selfloop transitions, 30 changer transitions 0/157 dead transitions. [2024-06-28 00:31:00,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 157 transitions, 1646 flow [2024-06-28 00:31:01,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:31:01,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:31:01,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 00:31:01,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-28 00:31:01,001 INFO L175 Difference]: Start difference. First operand has 104 places, 128 transitions, 1221 flow. Second operand 8 states and 150 transitions. [2024-06-28 00:31:01,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 157 transitions, 1646 flow [2024-06-28 00:31:01,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 157 transitions, 1580 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 00:31:01,040 INFO L231 Difference]: Finished difference. Result has 110 places, 133 transitions, 1292 flow [2024-06-28 00:31:01,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1292, PETRI_PLACES=110, PETRI_TRANSITIONS=133} [2024-06-28 00:31:01,041 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-28 00:31:01,041 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 133 transitions, 1292 flow [2024-06-28 00:31:01,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:01,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:01,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:01,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:31:01,043 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:31:01,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:01,044 INFO L85 PathProgramCache]: Analyzing trace with hash -163257918, now seen corresponding path program 1 times [2024-06-28 00:31:01,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:01,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359167674] [2024-06-28 00:31:01,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:01,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:02,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:02,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359167674] [2024-06-28 00:31:02,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359167674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:02,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:02,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:31:02,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658559235] [2024-06-28 00:31:02,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:02,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:31:02,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:02,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:31:02,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:31:03,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:31:03,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 133 transitions, 1292 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:03,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:03,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:31:03,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:03,761 INFO L124 PetriNetUnfolderBase]: 1454/2221 cut-off events. [2024-06-28 00:31:03,762 INFO L125 PetriNetUnfolderBase]: For 23658/23658 co-relation queries the response was YES. [2024-06-28 00:31:03,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11663 conditions, 2221 events. 1454/2221 cut-off events. For 23658/23658 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10776 event pairs, 564 based on Foata normal form. 4/2222 useless extension candidates. Maximal degree in co-relation 11608. Up to 2121 conditions per place. [2024-06-28 00:31:03,784 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 135 selfloop transitions, 18 changer transitions 0/158 dead transitions. [2024-06-28 00:31:03,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 158 transitions, 1684 flow [2024-06-28 00:31:03,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:31:03,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:31:03,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 00:31:03,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-28 00:31:03,787 INFO L175 Difference]: Start difference. First operand has 110 places, 133 transitions, 1292 flow. Second operand 8 states and 147 transitions. [2024-06-28 00:31:03,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 158 transitions, 1684 flow [2024-06-28 00:31:03,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 158 transitions, 1595 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 00:31:03,824 INFO L231 Difference]: Finished difference. Result has 112 places, 135 transitions, 1268 flow [2024-06-28 00:31:03,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1268, PETRI_PLACES=112, PETRI_TRANSITIONS=135} [2024-06-28 00:31:03,826 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-28 00:31:03,826 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 135 transitions, 1268 flow [2024-06-28 00:31:03,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:03,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:03,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:03,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:31:03,827 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)] === [2024-06-28 00:31:03,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:03,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1039385310, now seen corresponding path program 1 times [2024-06-28 00:31:03,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:03,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26449770] [2024-06-28 00:31:03,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:03,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:05,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:05,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26449770] [2024-06-28 00:31:05,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26449770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:05,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:05,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:31:05,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801988940] [2024-06-28 00:31:05,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:05,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:31:05,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:05,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:31:05,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:31:05,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:31:05,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 135 transitions, 1268 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-28 00:31:05,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:05,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:31:05,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:06,173 INFO L124 PetriNetUnfolderBase]: 1402/2175 cut-off events. [2024-06-28 00:31:06,174 INFO L125 PetriNetUnfolderBase]: For 28265/28347 co-relation queries the response was YES. [2024-06-28 00:31:06,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11836 conditions, 2175 events. 1402/2175 cut-off events. For 28265/28347 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10803 event pairs, 510 based on Foata normal form. 34/2156 useless extension candidates. Maximal degree in co-relation 11781. Up to 1934 conditions per place. [2024-06-28 00:31:06,196 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 95 selfloop transitions, 40 changer transitions 0/158 dead transitions. [2024-06-28 00:31:06,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 158 transitions, 1632 flow [2024-06-28 00:31:06,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:31:06,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:31:06,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 00:31:06,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-28 00:31:06,198 INFO L175 Difference]: Start difference. First operand has 112 places, 135 transitions, 1268 flow. Second operand 8 states and 154 transitions. [2024-06-28 00:31:06,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 158 transitions, 1632 flow [2024-06-28 00:31:06,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 158 transitions, 1585 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 00:31:06,236 INFO L231 Difference]: Finished difference. Result has 114 places, 138 transitions, 1346 flow [2024-06-28 00:31:06,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1346, PETRI_PLACES=114, PETRI_TRANSITIONS=138} [2024-06-28 00:31:06,237 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-28 00:31:06,237 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 138 transitions, 1346 flow [2024-06-28 00:31:06,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-28 00:31:06,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:06,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:06,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:31:06,238 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)] === [2024-06-28 00:31:06,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:06,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1039378366, now seen corresponding path program 1 times [2024-06-28 00:31:06,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:06,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767073134] [2024-06-28 00:31:06,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:06,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:07,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:07,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767073134] [2024-06-28 00:31:07,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767073134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:07,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:07,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:31:07,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943548780] [2024-06-28 00:31:07,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:07,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:31:07,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:07,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:31:07,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:31:07,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:31:07,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 138 transitions, 1346 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:07,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:07,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:31:07,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:08,395 INFO L124 PetriNetUnfolderBase]: 1481/2271 cut-off events. [2024-06-28 00:31:08,395 INFO L125 PetriNetUnfolderBase]: For 29291/29291 co-relation queries the response was YES. [2024-06-28 00:31:08,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12619 conditions, 2271 events. 1481/2271 cut-off events. For 29291/29291 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11021 event pairs, 458 based on Foata normal form. 2/2267 useless extension candidates. Maximal degree in co-relation 12563. Up to 2143 conditions per place. [2024-06-28 00:31:08,416 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 126 selfloop transitions, 32 changer transitions 0/163 dead transitions. [2024-06-28 00:31:08,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 163 transitions, 1754 flow [2024-06-28 00:31:08,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:31:08,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:31:08,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 00:31:08,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-28 00:31:08,418 INFO L175 Difference]: Start difference. First operand has 114 places, 138 transitions, 1346 flow. Second operand 8 states and 150 transitions. [2024-06-28 00:31:08,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 163 transitions, 1754 flow [2024-06-28 00:31:08,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 163 transitions, 1659 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 00:31:08,457 INFO L231 Difference]: Finished difference. Result has 116 places, 141 transitions, 1356 flow [2024-06-28 00:31:08,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1356, PETRI_PLACES=116, PETRI_TRANSITIONS=141} [2024-06-28 00:31:08,458 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-28 00:31:08,458 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 141 transitions, 1356 flow [2024-06-28 00:31:08,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:08,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:08,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:08,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:31:08,459 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)] === [2024-06-28 00:31:08,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:08,460 INFO L85 PathProgramCache]: Analyzing trace with hash -774616108, now seen corresponding path program 2 times [2024-06-28 00:31:08,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:08,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071539053] [2024-06-28 00:31:08,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:08,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:10,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:10,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071539053] [2024-06-28 00:31:10,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071539053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:10,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:10,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:31:10,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232095559] [2024-06-28 00:31:10,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:10,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:31:10,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:10,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:31:10,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:31:10,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:31:10,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 141 transitions, 1356 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-28 00:31:10,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:10,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:31:10,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:10,840 INFO L124 PetriNetUnfolderBase]: 1447/2229 cut-off events. [2024-06-28 00:31:10,840 INFO L125 PetriNetUnfolderBase]: For 36748/36880 co-relation queries the response was YES. [2024-06-28 00:31:10,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13080 conditions, 2229 events. 1447/2229 cut-off events. For 36748/36880 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11116 event pairs, 507 based on Foata normal form. 29/2199 useless extension candidates. Maximal degree in co-relation 13023. Up to 1923 conditions per place. [2024-06-28 00:31:10,856 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 87 selfloop transitions, 56 changer transitions 0/167 dead transitions. [2024-06-28 00:31:10,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 167 transitions, 1836 flow [2024-06-28 00:31:10,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:31:10,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:31:10,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 00:31:10,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-28 00:31:10,857 INFO L175 Difference]: Start difference. First operand has 116 places, 141 transitions, 1356 flow. Second operand 8 states and 155 transitions. [2024-06-28 00:31:10,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 167 transitions, 1836 flow [2024-06-28 00:31:10,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 167 transitions, 1757 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 00:31:10,888 INFO L231 Difference]: Finished difference. Result has 118 places, 147 transitions, 1472 flow [2024-06-28 00:31:10,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1277, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1472, PETRI_PLACES=118, PETRI_TRANSITIONS=147} [2024-06-28 00:31:10,889 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-28 00:31:10,889 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 147 transitions, 1472 flow [2024-06-28 00:31:10,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-28 00:31:10,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:10,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:10,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:31:10,890 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)] === [2024-06-28 00:31:10,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:10,890 INFO L85 PathProgramCache]: Analyzing trace with hash -774609164, now seen corresponding path program 2 times [2024-06-28 00:31:10,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:10,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998785605] [2024-06-28 00:31:10,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:10,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:12,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:12,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998785605] [2024-06-28 00:31:12,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998785605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:12,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:12,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:31:12,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168080862] [2024-06-28 00:31:12,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:12,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:31:12,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:12,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:31:12,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:31:12,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:31:12,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 147 transitions, 1472 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:12,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:12,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:31:12,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:13,133 INFO L124 PetriNetUnfolderBase]: 1508/2308 cut-off events. [2024-06-28 00:31:13,133 INFO L125 PetriNetUnfolderBase]: For 37312/37312 co-relation queries the response was YES. [2024-06-28 00:31:13,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13767 conditions, 2308 events. 1508/2308 cut-off events. For 37312/37312 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11201 event pairs, 481 based on Foata normal form. 2/2300 useless extension candidates. Maximal degree in co-relation 13709. Up to 2122 conditions per place. [2024-06-28 00:31:13,149 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 119 selfloop transitions, 48 changer transitions 0/172 dead transitions. [2024-06-28 00:31:13,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 172 transitions, 1904 flow [2024-06-28 00:31:13,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:31:13,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:31:13,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 00:31:13,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-28 00:31:13,151 INFO L175 Difference]: Start difference. First operand has 118 places, 147 transitions, 1472 flow. Second operand 8 states and 152 transitions. [2024-06-28 00:31:13,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 172 transitions, 1904 flow [2024-06-28 00:31:13,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 172 transitions, 1841 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 00:31:13,186 INFO L231 Difference]: Finished difference. Result has 122 places, 150 transitions, 1551 flow [2024-06-28 00:31:13,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1551, PETRI_PLACES=122, PETRI_TRANSITIONS=150} [2024-06-28 00:31:13,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-28 00:31:13,186 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 150 transitions, 1551 flow [2024-06-28 00:31:13,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:13,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:13,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:13,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:31:13,187 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)] === [2024-06-28 00:31:13,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:13,187 INFO L85 PathProgramCache]: Analyzing trace with hash -802906336, now seen corresponding path program 3 times [2024-06-28 00:31:13,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:13,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216208160] [2024-06-28 00:31:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:13,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:15,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:15,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216208160] [2024-06-28 00:31:15,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216208160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:15,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:15,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:31:15,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059645020] [2024-06-28 00:31:15,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:15,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:31:15,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:15,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:31:15,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:31:15,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:31:15,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 150 transitions, 1551 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:15,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:15,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:31:15,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:15,808 INFO L124 PetriNetUnfolderBase]: 1519/2324 cut-off events. [2024-06-28 00:31:15,808 INFO L125 PetriNetUnfolderBase]: For 41195/41195 co-relation queries the response was YES. [2024-06-28 00:31:15,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14422 conditions, 2324 events. 1519/2324 cut-off events. For 41195/41195 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11299 event pairs, 481 based on Foata normal form. 2/2316 useless extension candidates. Maximal degree in co-relation 14362. Up to 2092 conditions per place. [2024-06-28 00:31:15,825 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 113 selfloop transitions, 62 changer transitions 0/180 dead transitions. [2024-06-28 00:31:15,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 180 transitions, 2123 flow [2024-06-28 00:31:15,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:31:15,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:31:15,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 00:31:15,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 00:31:15,827 INFO L175 Difference]: Start difference. First operand has 122 places, 150 transitions, 1551 flow. Second operand 9 states and 164 transitions. [2024-06-28 00:31:15,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 180 transitions, 2123 flow [2024-06-28 00:31:15,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 180 transitions, 2005 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 00:31:15,862 INFO L231 Difference]: Finished difference. Result has 125 places, 156 transitions, 1647 flow [2024-06-28 00:31:15,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1433, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1647, PETRI_PLACES=125, PETRI_TRANSITIONS=156} [2024-06-28 00:31:15,863 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-28 00:31:15,863 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 156 transitions, 1647 flow [2024-06-28 00:31:15,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:15,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:15,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:15,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:31:15,864 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:31:15,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:15,864 INFO L85 PathProgramCache]: Analyzing trace with hash -766334954, now seen corresponding path program 4 times [2024-06-28 00:31:15,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:15,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212497476] [2024-06-28 00:31:15,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:15,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:17,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:17,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212497476] [2024-06-28 00:31:17,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212497476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:17,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:17,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:31:17,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151475322] [2024-06-28 00:31:17,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:17,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:31:17,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:17,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:31:17,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:31:17,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:31:17,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 156 transitions, 1647 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:17,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:17,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:31:17,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:17,985 INFO L124 PetriNetUnfolderBase]: 1530/2340 cut-off events. [2024-06-28 00:31:17,985 INFO L125 PetriNetUnfolderBase]: For 45678/45678 co-relation queries the response was YES. [2024-06-28 00:31:17,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15002 conditions, 2340 events. 1530/2340 cut-off events. For 45678/45678 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11355 event pairs, 481 based on Foata normal form. 2/2332 useless extension candidates. Maximal degree in co-relation 14941. Up to 2154 conditions per place. [2024-06-28 00:31:18,003 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 125 selfloop transitions, 51 changer transitions 0/181 dead transitions. [2024-06-28 00:31:18,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 181 transitions, 2109 flow [2024-06-28 00:31:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:31:18,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:31:18,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 00:31:18,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-28 00:31:18,004 INFO L175 Difference]: Start difference. First operand has 125 places, 156 transitions, 1647 flow. Second operand 8 states and 151 transitions. [2024-06-28 00:31:18,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 181 transitions, 2109 flow [2024-06-28 00:31:18,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 181 transitions, 2002 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 00:31:18,044 INFO L231 Difference]: Finished difference. Result has 128 places, 159 transitions, 1700 flow [2024-06-28 00:31:18,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1700, PETRI_PLACES=128, PETRI_TRANSITIONS=159} [2024-06-28 00:31:18,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-28 00:31:18,045 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 159 transitions, 1700 flow [2024-06-28 00:31:18,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:18,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:18,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:18,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:31:18,045 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)] === [2024-06-28 00:31:18,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:18,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2102005804, now seen corresponding path program 3 times [2024-06-28 00:31:18,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:18,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958526881] [2024-06-28 00:31:18,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:18,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:19,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:19,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958526881] [2024-06-28 00:31:19,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958526881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:19,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:19,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:31:19,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36942733] [2024-06-28 00:31:19,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:19,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:31:19,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:19,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:31:19,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:31:19,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:31:19,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 159 transitions, 1700 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-28 00:31:19,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:19,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:31:19,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:19,966 INFO L124 PetriNetUnfolderBase]: 1486/2320 cut-off events. [2024-06-28 00:31:19,966 INFO L125 PetriNetUnfolderBase]: For 52237/52383 co-relation queries the response was YES. [2024-06-28 00:31:19,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15181 conditions, 2320 events. 1486/2320 cut-off events. For 52237/52383 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11718 event pairs, 425 based on Foata normal form. 44/2317 useless extension candidates. Maximal degree in co-relation 15118. Up to 2067 conditions per place. [2024-06-28 00:31:19,984 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 126 selfloop transitions, 46 changer transitions 0/200 dead transitions. [2024-06-28 00:31:19,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 200 transitions, 2274 flow [2024-06-28 00:31:19,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:31:19,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:31:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 00:31:19,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-28 00:31:19,994 INFO L175 Difference]: Start difference. First operand has 128 places, 159 transitions, 1700 flow. Second operand 8 states and 160 transitions. [2024-06-28 00:31:19,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 200 transitions, 2274 flow [2024-06-28 00:31:20,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 200 transitions, 2152 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 00:31:20,035 INFO L231 Difference]: Finished difference. Result has 131 places, 175 transitions, 1864 flow [2024-06-28 00:31:20,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1864, PETRI_PLACES=131, PETRI_TRANSITIONS=175} [2024-06-28 00:31:20,035 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-28 00:31:20,035 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 175 transitions, 1864 flow [2024-06-28 00:31:20,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-28 00:31:20,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:20,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:20,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:31:20,036 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)] === [2024-06-28 00:31:20,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:20,036 INFO L85 PathProgramCache]: Analyzing trace with hash 292695222, now seen corresponding path program 4 times [2024-06-28 00:31:20,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:20,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815132434] [2024-06-28 00:31:20,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:20,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:21,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:21,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815132434] [2024-06-28 00:31:21,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815132434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:21,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:21,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:31:21,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956410610] [2024-06-28 00:31:21,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:21,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:31:21,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:21,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:31:21,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:31:21,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:31:21,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 175 transitions, 1864 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-28 00:31:21,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:21,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:31:21,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:22,025 INFO L124 PetriNetUnfolderBase]: 1527/2369 cut-off events. [2024-06-28 00:31:22,025 INFO L125 PetriNetUnfolderBase]: For 56981/57152 co-relation queries the response was YES. [2024-06-28 00:31:22,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15672 conditions, 2369 events. 1527/2369 cut-off events. For 56981/57152 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11913 event pairs, 499 based on Foata normal form. 51/2375 useless extension candidates. Maximal degree in co-relation 15607. Up to 2071 conditions per place. [2024-06-28 00:31:22,044 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 114 selfloop transitions, 65 changer transitions 0/207 dead transitions. [2024-06-28 00:31:22,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 207 transitions, 2451 flow [2024-06-28 00:31:22,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:31:22,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:31:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-28 00:31:22,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49390243902439024 [2024-06-28 00:31:22,045 INFO L175 Difference]: Start difference. First operand has 131 places, 175 transitions, 1864 flow. Second operand 8 states and 162 transitions. [2024-06-28 00:31:22,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 207 transitions, 2451 flow [2024-06-28 00:31:22,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 207 transitions, 2374 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 00:31:22,097 INFO L231 Difference]: Finished difference. Result has 136 places, 181 transitions, 2038 flow [2024-06-28 00:31:22,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2038, PETRI_PLACES=136, PETRI_TRANSITIONS=181} [2024-06-28 00:31:22,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-28 00:31:22,097 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 181 transitions, 2038 flow [2024-06-28 00:31:22,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-28 00:31:22,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:22,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:22,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:31:22,098 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)] === [2024-06-28 00:31:22,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:22,098 INFO L85 PathProgramCache]: Analyzing trace with hash -116781884, now seen corresponding path program 5 times [2024-06-28 00:31:22,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:22,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601285259] [2024-06-28 00:31:22,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:22,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:23,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:23,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601285259] [2024-06-28 00:31:23,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601285259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:23,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:23,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:31:23,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207695963] [2024-06-28 00:31:23,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:23,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:31:23,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:23,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:31:23,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:31:23,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:31:23,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 181 transitions, 2038 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-28 00:31:23,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:23,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:31:23,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:23,751 INFO L124 PetriNetUnfolderBase]: 1519/2362 cut-off events. [2024-06-28 00:31:23,751 INFO L125 PetriNetUnfolderBase]: For 60811/61000 co-relation queries the response was YES. [2024-06-28 00:31:23,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15826 conditions, 2362 events. 1519/2362 cut-off events. For 60811/61000 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11919 event pairs, 491 based on Foata normal form. 64/2384 useless extension candidates. Maximal degree in co-relation 15760. Up to 2107 conditions per place. [2024-06-28 00:31:23,770 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 132 selfloop transitions, 54 changer transitions 0/214 dead transitions. [2024-06-28 00:31:23,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 214 transitions, 2570 flow [2024-06-28 00:31:23,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:31:23,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:31:23,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 00:31:23,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-28 00:31:23,772 INFO L175 Difference]: Start difference. First operand has 136 places, 181 transitions, 2038 flow. Second operand 8 states and 160 transitions. [2024-06-28 00:31:23,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 214 transitions, 2570 flow [2024-06-28 00:31:23,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 214 transitions, 2387 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 00:31:23,825 INFO L231 Difference]: Finished difference. Result has 139 places, 188 transitions, 2088 flow [2024-06-28 00:31:23,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2088, PETRI_PLACES=139, PETRI_TRANSITIONS=188} [2024-06-28 00:31:23,826 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-28 00:31:23,826 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 188 transitions, 2088 flow [2024-06-28 00:31:23,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 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) [2024-06-28 00:31:23,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:23,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:23,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:31:23,826 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:31:23,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:23,827 INFO L85 PathProgramCache]: Analyzing trace with hash 292702166, now seen corresponding path program 5 times [2024-06-28 00:31:23,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:23,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678463940] [2024-06-28 00:31:23,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:23,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:25,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:25,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678463940] [2024-06-28 00:31:25,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678463940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:25,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:25,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:31:25,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143469502] [2024-06-28 00:31:25,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:25,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:31:25,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:25,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:31:25,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:31:25,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:31:25,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 188 transitions, 2088 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:25,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:25,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:31:25,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:26,007 INFO L124 PetriNetUnfolderBase]: 1633/2502 cut-off events. [2024-06-28 00:31:26,007 INFO L125 PetriNetUnfolderBase]: For 61485/61485 co-relation queries the response was YES. [2024-06-28 00:31:26,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16763 conditions, 2502 events. 1633/2502 cut-off events. For 61485/61485 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12379 event pairs, 540 based on Foata normal form. 2/2501 useless extension candidates. Maximal degree in co-relation 16695. Up to 2360 conditions per place. [2024-06-28 00:31:26,027 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 178 selfloop transitions, 36 changer transitions 0/219 dead transitions. [2024-06-28 00:31:26,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 219 transitions, 2628 flow [2024-06-28 00:31:26,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:31:26,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:31:26,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 00:31:26,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-28 00:31:26,029 INFO L175 Difference]: Start difference. First operand has 139 places, 188 transitions, 2088 flow. Second operand 9 states and 167 transitions. [2024-06-28 00:31:26,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 219 transitions, 2628 flow [2024-06-28 00:31:26,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 219 transitions, 2471 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-28 00:31:26,087 INFO L231 Difference]: Finished difference. Result has 141 places, 191 transitions, 2039 flow [2024-06-28 00:31:26,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1931, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2039, PETRI_PLACES=141, PETRI_TRANSITIONS=191} [2024-06-28 00:31:26,087 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-28 00:31:26,087 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 191 transitions, 2039 flow [2024-06-28 00:31:26,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:26,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:26,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:26,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:31:26,088 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)] === [2024-06-28 00:31:26,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:26,088 INFO L85 PathProgramCache]: Analyzing trace with hash 731244901, now seen corresponding path program 1 times [2024-06-28 00:31:26,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:26,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094271766] [2024-06-28 00:31:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:26,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:27,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:27,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094271766] [2024-06-28 00:31:27,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094271766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:27,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:27,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:31:27,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466073971] [2024-06-28 00:31:27,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:27,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:31:27,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:27,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:31:27,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:31:27,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:31:27,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 191 transitions, 2039 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:27,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:27,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:31:27,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:28,638 INFO L124 PetriNetUnfolderBase]: 1676/2569 cut-off events. [2024-06-28 00:31:28,638 INFO L125 PetriNetUnfolderBase]: For 65510/65510 co-relation queries the response was YES. [2024-06-28 00:31:28,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17248 conditions, 2569 events. 1676/2569 cut-off events. For 65510/65510 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12706 event pairs, 437 based on Foata normal form. 2/2560 useless extension candidates. Maximal degree in co-relation 17180. Up to 2320 conditions per place. [2024-06-28 00:31:28,659 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 190 selfloop transitions, 55 changer transitions 0/250 dead transitions. [2024-06-28 00:31:28,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 250 transitions, 3194 flow [2024-06-28 00:31:28,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:31:28,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:31:28,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 00:31:28,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-28 00:31:28,661 INFO L175 Difference]: Start difference. First operand has 141 places, 191 transitions, 2039 flow. Second operand 9 states and 170 transitions. [2024-06-28 00:31:28,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 250 transitions, 3194 flow [2024-06-28 00:31:28,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 250 transitions, 3098 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 00:31:28,725 INFO L231 Difference]: Finished difference. Result has 147 places, 221 transitions, 2508 flow [2024-06-28 00:31:28,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2508, PETRI_PLACES=147, PETRI_TRANSITIONS=221} [2024-06-28 00:31:28,726 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-28 00:31:28,726 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 221 transitions, 2508 flow [2024-06-28 00:31:28,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:28,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:28,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:28,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:31:28,727 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)] === [2024-06-28 00:31:28,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:28,727 INFO L85 PathProgramCache]: Analyzing trace with hash 731452291, now seen corresponding path program 2 times [2024-06-28 00:31:28,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:28,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179859568] [2024-06-28 00:31:28,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:28,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:30,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:30,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179859568] [2024-06-28 00:31:30,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179859568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:30,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:30,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:31:30,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549120222] [2024-06-28 00:31:30,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:30,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:31:30,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:30,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:31:30,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:31:30,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:31:30,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 221 transitions, 2508 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:30,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:30,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:31:30,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:31,086 INFO L124 PetriNetUnfolderBase]: 1671/2562 cut-off events. [2024-06-28 00:31:31,086 INFO L125 PetriNetUnfolderBase]: For 70736/70736 co-relation queries the response was YES. [2024-06-28 00:31:31,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17901 conditions, 2562 events. 1671/2562 cut-off events. For 70736/70736 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12686 event pairs, 415 based on Foata normal form. 2/2553 useless extension candidates. Maximal degree in co-relation 17828. Up to 2315 conditions per place. [2024-06-28 00:31:31,108 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 185 selfloop transitions, 60 changer transitions 0/250 dead transitions. [2024-06-28 00:31:31,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 250 transitions, 3258 flow [2024-06-28 00:31:31,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:31:31,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:31:31,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 00:31:31,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-28 00:31:31,109 INFO L175 Difference]: Start difference. First operand has 147 places, 221 transitions, 2508 flow. Second operand 9 states and 167 transitions. [2024-06-28 00:31:31,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 250 transitions, 3258 flow [2024-06-28 00:31:31,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 250 transitions, 3165 flow, removed 43 selfloop flow, removed 2 redundant places. [2024-06-28 00:31:31,178 INFO L231 Difference]: Finished difference. Result has 155 places, 226 transitions, 2649 flow [2024-06-28 00:31:31,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2429, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2649, PETRI_PLACES=155, PETRI_TRANSITIONS=226} [2024-06-28 00:31:31,179 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-28 00:31:31,179 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 226 transitions, 2649 flow [2024-06-28 00:31:31,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:31,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:31,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:31,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:31:31,180 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)] === [2024-06-28 00:31:31,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:31,180 INFO L85 PathProgramCache]: Analyzing trace with hash 583635301, now seen corresponding path program 3 times [2024-06-28 00:31:31,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:31,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125550314] [2024-06-28 00:31:31,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:31,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:32,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:32,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125550314] [2024-06-28 00:31:32,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125550314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:32,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:32,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:31:32,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476849844] [2024-06-28 00:31:32,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:32,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:31:32,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:32,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:31:32,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:31:32,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:31:32,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 226 transitions, 2649 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:32,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:32,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:31:32,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:33,258 INFO L124 PetriNetUnfolderBase]: 1666/2556 cut-off events. [2024-06-28 00:31:33,259 INFO L125 PetriNetUnfolderBase]: For 75330/75330 co-relation queries the response was YES. [2024-06-28 00:31:33,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18100 conditions, 2556 events. 1666/2556 cut-off events. For 75330/75330 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12626 event pairs, 413 based on Foata normal form. 2/2547 useless extension candidates. Maximal degree in co-relation 18024. Up to 2376 conditions per place. [2024-06-28 00:31:33,281 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 202 selfloop transitions, 41 changer transitions 0/248 dead transitions. [2024-06-28 00:31:33,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 248 transitions, 3207 flow [2024-06-28 00:31:33,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:31:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:31:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-28 00:31:33,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-28 00:31:33,283 INFO L175 Difference]: Start difference. First operand has 155 places, 226 transitions, 2649 flow. Second operand 8 states and 153 transitions. [2024-06-28 00:31:33,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 248 transitions, 3207 flow [2024-06-28 00:31:33,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 248 transitions, 3100 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 00:31:33,383 INFO L231 Difference]: Finished difference. Result has 158 places, 226 transitions, 2634 flow [2024-06-28 00:31:33,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2542, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2634, PETRI_PLACES=158, PETRI_TRANSITIONS=226} [2024-06-28 00:31:33,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-28 00:31:33,384 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 226 transitions, 2634 flow [2024-06-28 00:31:33,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:33,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:33,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:33,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:31:33,385 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:31:33,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:33,385 INFO L85 PathProgramCache]: Analyzing trace with hash 731460227, now seen corresponding path program 1 times [2024-06-28 00:31:33,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:33,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346799755] [2024-06-28 00:31:33,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:33,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:34,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:34,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346799755] [2024-06-28 00:31:34,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346799755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:34,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:34,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:31:34,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307081325] [2024-06-28 00:31:34,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:34,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:31:34,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:34,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:31:34,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:31:35,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:31:35,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 226 transitions, 2634 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:35,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:35,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:31:35,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:35,798 INFO L124 PetriNetUnfolderBase]: 1683/2586 cut-off events. [2024-06-28 00:31:35,798 INFO L125 PetriNetUnfolderBase]: For 81222/81222 co-relation queries the response was YES. [2024-06-28 00:31:35,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18377 conditions, 2586 events. 1683/2586 cut-off events. For 81222/81222 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12788 event pairs, 418 based on Foata normal form. 4/2584 useless extension candidates. Maximal degree in co-relation 18300. Up to 2414 conditions per place. [2024-06-28 00:31:35,823 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 213 selfloop transitions, 37 changer transitions 0/255 dead transitions. [2024-06-28 00:31:35,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 255 transitions, 3260 flow [2024-06-28 00:31:35,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:31:35,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:31:35,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 00:31:35,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-28 00:31:35,825 INFO L175 Difference]: Start difference. First operand has 158 places, 226 transitions, 2634 flow. Second operand 9 states and 167 transitions. [2024-06-28 00:31:35,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 255 transitions, 3260 flow [2024-06-28 00:31:35,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 255 transitions, 3144 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 00:31:35,984 INFO L231 Difference]: Finished difference. Result has 161 places, 228 transitions, 2640 flow [2024-06-28 00:31:35,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2518, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2640, PETRI_PLACES=161, PETRI_TRANSITIONS=228} [2024-06-28 00:31:35,986 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-28 00:31:35,986 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 228 transitions, 2640 flow [2024-06-28 00:31:35,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:35,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:35,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:35,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:31:35,987 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)] === [2024-06-28 00:31:35,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:35,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1756912515, now seen corresponding path program 4 times [2024-06-28 00:31:35,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:35,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216639585] [2024-06-28 00:31:35,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:35,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:37,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:37,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216639585] [2024-06-28 00:31:37,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216639585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:37,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:37,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:31:37,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989656983] [2024-06-28 00:31:37,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:37,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:31:37,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:37,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:31:37,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:31:37,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:31:37,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 228 transitions, 2640 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:37,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:37,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:31:37,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:38,265 INFO L124 PetriNetUnfolderBase]: 1726/2646 cut-off events. [2024-06-28 00:31:38,265 INFO L125 PetriNetUnfolderBase]: For 87575/87575 co-relation queries the response was YES. [2024-06-28 00:31:38,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19154 conditions, 2646 events. 1726/2646 cut-off events. For 87575/87575 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13168 event pairs, 469 based on Foata normal form. 2/2629 useless extension candidates. Maximal degree in co-relation 19075. Up to 2235 conditions per place. [2024-06-28 00:31:38,286 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 190 selfloop transitions, 83 changer transitions 0/278 dead transitions. [2024-06-28 00:31:38,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 278 transitions, 3900 flow [2024-06-28 00:31:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:31:38,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:31:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 00:31:38,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-28 00:31:38,288 INFO L175 Difference]: Start difference. First operand has 161 places, 228 transitions, 2640 flow. Second operand 9 states and 173 transitions. [2024-06-28 00:31:38,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 278 transitions, 3900 flow [2024-06-28 00:31:38,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 278 transitions, 3798 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-28 00:31:38,409 INFO L231 Difference]: Finished difference. Result has 165 places, 246 transitions, 3020 flow [2024-06-28 00:31:38,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2538, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3020, PETRI_PLACES=165, PETRI_TRANSITIONS=246} [2024-06-28 00:31:38,409 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-28 00:31:38,410 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 246 transitions, 3020 flow [2024-06-28 00:31:38,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:38,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:38,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:38,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:31:38,411 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)] === [2024-06-28 00:31:38,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:38,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1756705125, now seen corresponding path program 5 times [2024-06-28 00:31:38,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:38,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983143967] [2024-06-28 00:31:38,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:38,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:40,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:40,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983143967] [2024-06-28 00:31:40,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983143967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:40,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:40,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:31:40,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434216673] [2024-06-28 00:31:40,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:40,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:31:40,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:40,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:31:40,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:31:40,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:31:40,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 246 transitions, 3020 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:40,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:40,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:31:40,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:41,270 INFO L124 PetriNetUnfolderBase]: 1721/2639 cut-off events. [2024-06-28 00:31:41,271 INFO L125 PetriNetUnfolderBase]: For 94191/94191 co-relation queries the response was YES. [2024-06-28 00:31:41,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19788 conditions, 2639 events. 1721/2639 cut-off events. For 94191/94191 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13108 event pairs, 421 based on Foata normal form. 2/2625 useless extension candidates. Maximal degree in co-relation 19706. Up to 2230 conditions per place. [2024-06-28 00:31:41,296 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 187 selfloop transitions, 84 changer transitions 0/276 dead transitions. [2024-06-28 00:31:41,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 276 transitions, 3932 flow [2024-06-28 00:31:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:31:41,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:31:41,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 00:31:41,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-28 00:31:41,297 INFO L175 Difference]: Start difference. First operand has 165 places, 246 transitions, 3020 flow. Second operand 9 states and 170 transitions. [2024-06-28 00:31:41,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 276 transitions, 3932 flow [2024-06-28 00:31:41,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 276 transitions, 3814 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-28 00:31:41,422 INFO L231 Difference]: Finished difference. Result has 171 places, 246 transitions, 3078 flow [2024-06-28 00:31:41,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2902, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3078, PETRI_PLACES=171, PETRI_TRANSITIONS=246} [2024-06-28 00:31:41,423 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-28 00:31:41,423 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 246 transitions, 3078 flow [2024-06-28 00:31:41,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:41,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:41,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:41,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:31:41,423 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)] === [2024-06-28 00:31:41,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:41,424 INFO L85 PathProgramCache]: Analyzing trace with hash -378287987, now seen corresponding path program 6 times [2024-06-28 00:31:41,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:41,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650265402] [2024-06-28 00:31:41,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:41,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:42,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:42,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650265402] [2024-06-28 00:31:42,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650265402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:42,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:42,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:31:42,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774154963] [2024-06-28 00:31:42,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:42,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:31:42,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:42,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:31:42,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:31:42,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:31:42,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 246 transitions, 3078 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:42,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:42,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:31:42,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:43,688 INFO L124 PetriNetUnfolderBase]: 1716/2632 cut-off events. [2024-06-28 00:31:43,689 INFO L125 PetriNetUnfolderBase]: For 97184/97184 co-relation queries the response was YES. [2024-06-28 00:31:43,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19790 conditions, 2632 events. 1716/2632 cut-off events. For 97184/97184 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13102 event pairs, 421 based on Foata normal form. 2/2618 useless extension candidates. Maximal degree in co-relation 19706. Up to 2225 conditions per place. [2024-06-28 00:31:43,712 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 174 selfloop transitions, 97 changer transitions 0/276 dead transitions. [2024-06-28 00:31:43,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 276 transitions, 3916 flow [2024-06-28 00:31:43,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:31:43,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:31:43,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 00:31:43,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-28 00:31:43,714 INFO L175 Difference]: Start difference. First operand has 171 places, 246 transitions, 3078 flow. Second operand 9 states and 167 transitions. [2024-06-28 00:31:43,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 276 transitions, 3916 flow [2024-06-28 00:31:43,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 276 transitions, 3706 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-28 00:31:43,840 INFO L231 Difference]: Finished difference. Result has 174 places, 252 transitions, 3214 flow [2024-06-28 00:31:43,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2885, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3214, PETRI_PLACES=174, PETRI_TRANSITIONS=252} [2024-06-28 00:31:43,841 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-28 00:31:43,841 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 252 transitions, 3214 flow [2024-06-28 00:31:43,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:43,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:43,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:43,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:31:43,842 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)] === [2024-06-28 00:31:43,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:43,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1756920451, now seen corresponding path program 2 times [2024-06-28 00:31:43,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:43,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477059613] [2024-06-28 00:31:43,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:43,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:45,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:45,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477059613] [2024-06-28 00:31:45,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477059613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:45,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:45,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:31:45,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353151779] [2024-06-28 00:31:45,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:45,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:31:45,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:45,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:31:45,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:31:45,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:31:45,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 252 transitions, 3214 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:45,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:45,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:31:45,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:46,473 INFO L124 PetriNetUnfolderBase]: 1733/2679 cut-off events. [2024-06-28 00:31:46,474 INFO L125 PetriNetUnfolderBase]: For 104701/104701 co-relation queries the response was YES. [2024-06-28 00:31:46,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20317 conditions, 2679 events. 1733/2679 cut-off events. For 104701/104701 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13446 event pairs, 390 based on Foata normal form. 4/2675 useless extension candidates. Maximal degree in co-relation 20231. Up to 2434 conditions per place. [2024-06-28 00:31:46,499 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 226 selfloop transitions, 50 changer transitions 0/281 dead transitions. [2024-06-28 00:31:46,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 281 transitions, 3898 flow [2024-06-28 00:31:46,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:31:46,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:31:46,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-28 00:31:46,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-28 00:31:46,500 INFO L175 Difference]: Start difference. First operand has 174 places, 252 transitions, 3214 flow. Second operand 10 states and 179 transitions. [2024-06-28 00:31:46,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 281 transitions, 3898 flow [2024-06-28 00:31:46,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 281 transitions, 3780 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 00:31:46,662 INFO L231 Difference]: Finished difference. Result has 179 places, 254 transitions, 3247 flow [2024-06-28 00:31:46,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3096, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3247, PETRI_PLACES=179, PETRI_TRANSITIONS=254} [2024-06-28 00:31:46,663 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-28 00:31:46,663 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 254 transitions, 3247 flow [2024-06-28 00:31:46,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:46,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:46,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:46,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:31:46,663 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:31:46,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:46,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2022617731, now seen corresponding path program 3 times [2024-06-28 00:31:46,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:46,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149655532] [2024-06-28 00:31:46,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:46,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:48,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:48,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149655532] [2024-06-28 00:31:48,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149655532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:48,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:48,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:31:48,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545244209] [2024-06-28 00:31:48,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:48,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:31:48,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:48,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:31:48,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:31:49,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:31:49,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 254 transitions, 3247 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:49,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:49,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:31:49,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:49,804 INFO L124 PetriNetUnfolderBase]: 1750/2691 cut-off events. [2024-06-28 00:31:49,805 INFO L125 PetriNetUnfolderBase]: For 110916/110916 co-relation queries the response was YES. [2024-06-28 00:31:49,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20698 conditions, 2691 events. 1750/2691 cut-off events. For 110916/110916 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13494 event pairs, 424 based on Foata normal form. 4/2687 useless extension candidates. Maximal degree in co-relation 20611. Up to 2411 conditions per place. [2024-06-28 00:31:49,831 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 208 selfloop transitions, 70 changer transitions 0/283 dead transitions. [2024-06-28 00:31:49,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 283 transitions, 3939 flow [2024-06-28 00:31:49,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:31:49,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:31:49,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-28 00:31:49,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-28 00:31:49,833 INFO L175 Difference]: Start difference. First operand has 179 places, 254 transitions, 3247 flow. Second operand 10 states and 179 transitions. [2024-06-28 00:31:49,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 283 transitions, 3939 flow [2024-06-28 00:31:49,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 283 transitions, 3806 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-28 00:31:49,982 INFO L231 Difference]: Finished difference. Result has 181 places, 256 transitions, 3309 flow [2024-06-28 00:31:49,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3114, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3309, PETRI_PLACES=181, PETRI_TRANSITIONS=256} [2024-06-28 00:31:49,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-28 00:31:49,983 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 256 transitions, 3309 flow [2024-06-28 00:31:49,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:49,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:49,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:49,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:31:49,983 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:31:49,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:49,983 INFO L85 PathProgramCache]: Analyzing trace with hash 2013420961, now seen corresponding path program 4 times [2024-06-28 00:31:49,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:49,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050603628] [2024-06-28 00:31:49,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:49,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:51,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:51,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050603628] [2024-06-28 00:31:51,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050603628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:51,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:51,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:31:51,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432403177] [2024-06-28 00:31:51,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:51,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:31:51,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:51,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:31:51,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:31:51,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:31:51,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 256 transitions, 3309 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:51,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:51,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:31:51,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:52,624 INFO L124 PetriNetUnfolderBase]: 1767/2733 cut-off events. [2024-06-28 00:31:52,625 INFO L125 PetriNetUnfolderBase]: For 117732/117732 co-relation queries the response was YES. [2024-06-28 00:31:52,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21218 conditions, 2733 events. 1767/2733 cut-off events. For 117732/117732 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13801 event pairs, 451 based on Foata normal form. 4/2729 useless extension candidates. Maximal degree in co-relation 21130. Up to 2488 conditions per place. [2024-06-28 00:31:52,650 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 227 selfloop transitions, 53 changer transitions 0/285 dead transitions. [2024-06-28 00:31:52,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 285 transitions, 4009 flow [2024-06-28 00:31:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:31:52,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:31:52,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-28 00:31:52,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-28 00:31:52,653 INFO L175 Difference]: Start difference. First operand has 181 places, 256 transitions, 3309 flow. Second operand 10 states and 178 transitions. [2024-06-28 00:31:52,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 285 transitions, 4009 flow [2024-06-28 00:31:52,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 285 transitions, 3832 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-28 00:31:52,826 INFO L231 Difference]: Finished difference. Result has 183 places, 258 transitions, 3297 flow [2024-06-28 00:31:52,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3132, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3297, PETRI_PLACES=183, PETRI_TRANSITIONS=258} [2024-06-28 00:31:52,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-28 00:31:52,827 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 258 transitions, 3297 flow [2024-06-28 00:31:52,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:52,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:52,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:52,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:31:52,827 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:31:52,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:52,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2022944161, now seen corresponding path program 5 times [2024-06-28 00:31:52,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:52,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104887178] [2024-06-28 00:31:52,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:52,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:54,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:54,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104887178] [2024-06-28 00:31:54,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104887178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:54,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:54,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:31:54,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379922095] [2024-06-28 00:31:54,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:54,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:31:54,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:54,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:31:54,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:31:55,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:31:55,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 258 transitions, 3297 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:55,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:55,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:31:55,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:55,930 INFO L124 PetriNetUnfolderBase]: 1784/2755 cut-off events. [2024-06-28 00:31:55,930 INFO L125 PetriNetUnfolderBase]: For 125930/125930 co-relation queries the response was YES. [2024-06-28 00:31:55,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21579 conditions, 2755 events. 1784/2755 cut-off events. For 125930/125930 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13966 event pairs, 394 based on Foata normal form. 4/2751 useless extension candidates. Maximal degree in co-relation 21490. Up to 2343 conditions per place. [2024-06-28 00:31:55,961 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 206 selfloop transitions, 81 changer transitions 0/292 dead transitions. [2024-06-28 00:31:55,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 292 transitions, 4213 flow [2024-06-28 00:31:55,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:31:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:31:55,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-28 00:31:55,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-28 00:31:55,963 INFO L175 Difference]: Start difference. First operand has 183 places, 258 transitions, 3297 flow. Second operand 10 states and 182 transitions. [2024-06-28 00:31:55,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 292 transitions, 4213 flow [2024-06-28 00:31:56,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 292 transitions, 4066 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-28 00:31:56,135 INFO L231 Difference]: Finished difference. Result has 185 places, 262 transitions, 3427 flow [2024-06-28 00:31:56,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3150, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3427, PETRI_PLACES=185, PETRI_TRANSITIONS=262} [2024-06-28 00:31:56,136 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-28 00:31:56,136 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 262 transitions, 3427 flow [2024-06-28 00:31:56,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:56,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:56,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:56,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 00:31:56,137 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:31:56,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:56,137 INFO L85 PathProgramCache]: Analyzing trace with hash -737669787, now seen corresponding path program 7 times [2024-06-28 00:31:56,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:56,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837925695] [2024-06-28 00:31:56,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:56,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:31:57,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:31:57,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:31:57,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837925695] [2024-06-28 00:31:57,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837925695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:31:57,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:31:57,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:31:57,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742063439] [2024-06-28 00:31:57,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:31:57,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:31:57,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:31:57,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:31:57,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:31:57,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:31:57,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 262 transitions, 3427 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:57,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:31:57,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:31:57,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:31:58,324 INFO L124 PetriNetUnfolderBase]: 1802/2783 cut-off events. [2024-06-28 00:31:58,324 INFO L125 PetriNetUnfolderBase]: For 129818/129818 co-relation queries the response was YES. [2024-06-28 00:31:58,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22074 conditions, 2783 events. 1802/2783 cut-off events. For 129818/129818 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14016 event pairs, 432 based on Foata normal form. 2/2782 useless extension candidates. Maximal degree in co-relation 21984. Up to 2583 conditions per place. [2024-06-28 00:31:58,351 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 246 selfloop transitions, 50 changer transitions 0/301 dead transitions. [2024-06-28 00:31:58,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 301 transitions, 4258 flow [2024-06-28 00:31:58,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:31:58,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:31:58,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 00:31:58,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-28 00:31:58,353 INFO L175 Difference]: Start difference. First operand has 185 places, 262 transitions, 3427 flow. Second operand 9 states and 170 transitions. [2024-06-28 00:31:58,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 301 transitions, 4258 flow [2024-06-28 00:31:58,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 301 transitions, 4111 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 00:31:58,575 INFO L231 Difference]: Finished difference. Result has 189 places, 273 transitions, 3567 flow [2024-06-28 00:31:58,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3280, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3567, PETRI_PLACES=189, PETRI_TRANSITIONS=273} [2024-06-28 00:31:58,576 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-28 00:31:58,576 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 273 transitions, 3567 flow [2024-06-28 00:31:58,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:31:58,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:31:58,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:31:58,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 00:31:58,577 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)] === [2024-06-28 00:31:58,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:31:58,577 INFO L85 PathProgramCache]: Analyzing trace with hash 483617987, now seen corresponding path program 8 times [2024-06-28 00:31:58,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:31:58,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578576747] [2024-06-28 00:31:58,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:31:58,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:31:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:00,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:00,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578576747] [2024-06-28 00:32:00,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578576747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:00,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:00,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:32:00,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002480908] [2024-06-28 00:32:00,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:00,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:32:00,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:00,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:32:00,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:32:00,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:32:00,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 273 transitions, 3567 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:00,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:00,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:32:00,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:01,168 INFO L124 PetriNetUnfolderBase]: 1850/2867 cut-off events. [2024-06-28 00:32:01,168 INFO L125 PetriNetUnfolderBase]: For 137118/137118 co-relation queries the response was YES. [2024-06-28 00:32:01,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22778 conditions, 2867 events. 1850/2867 cut-off events. For 137118/137118 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14602 event pairs, 382 based on Foata normal form. 2/2866 useless extension candidates. Maximal degree in co-relation 22685. Up to 2550 conditions per place. [2024-06-28 00:32:01,199 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 235 selfloop transitions, 83 changer transitions 0/323 dead transitions. [2024-06-28 00:32:01,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 323 transitions, 4856 flow [2024-06-28 00:32:01,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:32:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:32:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-28 00:32:01,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47696476964769646 [2024-06-28 00:32:01,201 INFO L175 Difference]: Start difference. First operand has 189 places, 273 transitions, 3567 flow. Second operand 9 states and 176 transitions. [2024-06-28 00:32:01,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 323 transitions, 4856 flow [2024-06-28 00:32:01,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 323 transitions, 4768 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-28 00:32:01,381 INFO L231 Difference]: Finished difference. Result has 197 places, 291 transitions, 3988 flow [2024-06-28 00:32:01,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3479, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3988, PETRI_PLACES=197, PETRI_TRANSITIONS=291} [2024-06-28 00:32:01,381 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-28 00:32:01,381 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 291 transitions, 3988 flow [2024-06-28 00:32:01,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:01,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:01,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:01,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 00:32:01,382 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)] === [2024-06-28 00:32:01,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:01,382 INFO L85 PathProgramCache]: Analyzing trace with hash 483825377, now seen corresponding path program 9 times [2024-06-28 00:32:01,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:01,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635313070] [2024-06-28 00:32:01,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:01,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:02,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:02,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635313070] [2024-06-28 00:32:02,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635313070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:02,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:02,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:32:02,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152811345] [2024-06-28 00:32:02,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:02,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:32:02,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:02,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:32:02,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:32:02,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:32:02,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 291 transitions, 3988 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:02,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:02,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:32:02,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:03,697 INFO L124 PetriNetUnfolderBase]: 1845/2860 cut-off events. [2024-06-28 00:32:03,697 INFO L125 PetriNetUnfolderBase]: For 143422/143422 co-relation queries the response was YES. [2024-06-28 00:32:03,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23107 conditions, 2860 events. 1845/2860 cut-off events. For 143422/143422 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14513 event pairs, 382 based on Foata normal form. 2/2859 useless extension candidates. Maximal degree in co-relation 23011. Up to 2545 conditions per place. [2024-06-28 00:32:03,738 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 228 selfloop transitions, 88 changer transitions 0/321 dead transitions. [2024-06-28 00:32:03,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 321 transitions, 4870 flow [2024-06-28 00:32:03,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:32:03,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:32:03,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 00:32:03,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-28 00:32:03,740 INFO L175 Difference]: Start difference. First operand has 197 places, 291 transitions, 3988 flow. Second operand 9 states and 173 transitions. [2024-06-28 00:32:03,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 321 transitions, 4870 flow [2024-06-28 00:32:03,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 321 transitions, 4630 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-28 00:32:03,949 INFO L231 Difference]: Finished difference. Result has 201 places, 291 transitions, 3936 flow [2024-06-28 00:32:03,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3748, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3936, PETRI_PLACES=201, PETRI_TRANSITIONS=291} [2024-06-28 00:32:03,949 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-28 00:32:03,949 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 291 transitions, 3936 flow [2024-06-28 00:32:03,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:03,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:03,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:03,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 00:32:03,950 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)] === [2024-06-28 00:32:03,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:03,951 INFO L85 PathProgramCache]: Analyzing trace with hash 674729589, now seen corresponding path program 10 times [2024-06-28 00:32:03,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:03,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334072956] [2024-06-28 00:32:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:03,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:05,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:05,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334072956] [2024-06-28 00:32:05,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334072956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:05,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:05,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:32:05,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904826787] [2024-06-28 00:32:05,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:05,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:32:05,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:05,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:32:05,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:32:05,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:32:05,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 291 transitions, 3936 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:05,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:05,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:32:05,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:05,881 INFO L124 PetriNetUnfolderBase]: 1847/2866 cut-off events. [2024-06-28 00:32:05,881 INFO L125 PetriNetUnfolderBase]: For 147549/147549 co-relation queries the response was YES. [2024-06-28 00:32:05,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23148 conditions, 2866 events. 1847/2866 cut-off events. For 147549/147549 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14552 event pairs, 376 based on Foata normal form. 2/2865 useless extension candidates. Maximal degree in co-relation 23051. Up to 2646 conditions per place. [2024-06-28 00:32:05,912 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 265 selfloop transitions, 56 changer transitions 0/326 dead transitions. [2024-06-28 00:32:05,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 326 transitions, 4740 flow [2024-06-28 00:32:05,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:32:05,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:32:05,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 00:32:05,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-28 00:32:05,915 INFO L175 Difference]: Start difference. First operand has 201 places, 291 transitions, 3936 flow. Second operand 9 states and 170 transitions. [2024-06-28 00:32:05,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 326 transitions, 4740 flow [2024-06-28 00:32:06,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 326 transitions, 4540 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 00:32:06,125 INFO L231 Difference]: Finished difference. Result has 205 places, 296 transitions, 3946 flow [2024-06-28 00:32:06,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3745, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3946, PETRI_PLACES=205, PETRI_TRANSITIONS=296} [2024-06-28 00:32:06,125 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-28 00:32:06,125 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 296 transitions, 3946 flow [2024-06-28 00:32:06,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:06,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:06,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:06,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 00:32:06,126 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)] === [2024-06-28 00:32:06,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:06,126 INFO L85 PathProgramCache]: Analyzing trace with hash 483833313, now seen corresponding path program 6 times [2024-06-28 00:32:06,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:06,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752463546] [2024-06-28 00:32:06,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:06,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:07,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:07,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752463546] [2024-06-28 00:32:07,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752463546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:07,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:07,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:32:07,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028237183] [2024-06-28 00:32:07,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:07,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:32:07,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:07,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:32:07,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:32:07,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:32:07,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 296 transitions, 3946 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:07,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:07,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:32:07,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:08,790 INFO L124 PetriNetUnfolderBase]: 1919/2982 cut-off events. [2024-06-28 00:32:08,791 INFO L125 PetriNetUnfolderBase]: For 168363/168363 co-relation queries the response was YES. [2024-06-28 00:32:08,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23703 conditions, 2982 events. 1919/2982 cut-off events. For 168363/168363 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15285 event pairs, 390 based on Foata normal form. 22/3000 useless extension candidates. Maximal degree in co-relation 23604. Up to 2552 conditions per place. [2024-06-28 00:32:08,822 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 242 selfloop transitions, 91 changer transitions 0/338 dead transitions. [2024-06-28 00:32:08,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 338 transitions, 4840 flow [2024-06-28 00:32:08,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:32:08,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:32:08,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-28 00:32:08,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47317073170731705 [2024-06-28 00:32:08,824 INFO L175 Difference]: Start difference. First operand has 205 places, 296 transitions, 3946 flow. Second operand 10 states and 194 transitions. [2024-06-28 00:32:08,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 338 transitions, 4840 flow [2024-06-28 00:32:09,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 338 transitions, 4653 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 00:32:09,061 INFO L231 Difference]: Finished difference. Result has 210 places, 302 transitions, 4076 flow [2024-06-28 00:32:09,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3759, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4076, PETRI_PLACES=210, PETRI_TRANSITIONS=302} [2024-06-28 00:32:09,062 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-28 00:32:09,062 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 302 transitions, 4076 flow [2024-06-28 00:32:09,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:09,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:09,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:09,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 00:32:09,062 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)] === [2024-06-28 00:32:09,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:09,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1624131113, now seen corresponding path program 1 times [2024-06-28 00:32:09,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:09,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147013297] [2024-06-28 00:32:09,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:09,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:10,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:10,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147013297] [2024-06-28 00:32:10,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147013297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:10,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:10,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:32:10,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823517310] [2024-06-28 00:32:10,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:10,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:32:10,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:10,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:32:10,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:32:10,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:32:10,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 302 transitions, 4076 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:10,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:10,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:32:10,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:11,517 INFO L124 PetriNetUnfolderBase]: 1853/2917 cut-off events. [2024-06-28 00:32:11,517 INFO L125 PetriNetUnfolderBase]: For 175722/175722 co-relation queries the response was YES. [2024-06-28 00:32:11,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24101 conditions, 2917 events. 1853/2917 cut-off events. For 175722/175722 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15384 event pairs, 365 based on Foata normal form. 5/2859 useless extension candidates. Maximal degree in co-relation 24000. Up to 2483 conditions per place. [2024-06-28 00:32:11,548 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 174 selfloop transitions, 85 changer transitions 0/328 dead transitions. [2024-06-28 00:32:11,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 328 transitions, 4709 flow [2024-06-28 00:32:11,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:32:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:32:11,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 00:32:11,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-28 00:32:11,550 INFO L175 Difference]: Start difference. First operand has 210 places, 302 transitions, 4076 flow. Second operand 9 states and 172 transitions. [2024-06-28 00:32:11,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 328 transitions, 4709 flow [2024-06-28 00:32:11,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 328 transitions, 4549 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 00:32:11,802 INFO L231 Difference]: Finished difference. Result has 213 places, 304 transitions, 4128 flow [2024-06-28 00:32:11,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3916, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4128, PETRI_PLACES=213, PETRI_TRANSITIONS=304} [2024-06-28 00:32:11,802 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-28 00:32:11,803 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 304 transitions, 4128 flow [2024-06-28 00:32:11,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:11,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:11,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:11,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 00:32:11,803 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)] === [2024-06-28 00:32:11,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:11,804 INFO L85 PathProgramCache]: Analyzing trace with hash -353447799, now seen corresponding path program 2 times [2024-06-28 00:32:11,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:11,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83710996] [2024-06-28 00:32:11,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:11,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:13,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:13,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83710996] [2024-06-28 00:32:13,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83710996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:13,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:13,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:32:13,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422872355] [2024-06-28 00:32:13,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:13,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:32:13,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:13,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:32:13,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:32:13,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:32:13,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 304 transitions, 4128 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:13,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:13,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:32:13,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:14,252 INFO L124 PetriNetUnfolderBase]: 1879/2947 cut-off events. [2024-06-28 00:32:14,252 INFO L125 PetriNetUnfolderBase]: For 186534/186556 co-relation queries the response was YES. [2024-06-28 00:32:14,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24829 conditions, 2947 events. 1879/2947 cut-off events. For 186534/186556 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15573 event pairs, 421 based on Foata normal form. 5/2892 useless extension candidates. Maximal degree in co-relation 24726. Up to 2557 conditions per place. [2024-06-28 00:32:14,286 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 192 selfloop transitions, 71 changer transitions 0/332 dead transitions. [2024-06-28 00:32:14,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 332 transitions, 4807 flow [2024-06-28 00:32:14,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:32:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:32:14,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 00:32:14,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-28 00:32:14,288 INFO L175 Difference]: Start difference. First operand has 213 places, 304 transitions, 4128 flow. Second operand 9 states and 171 transitions. [2024-06-28 00:32:14,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 332 transitions, 4807 flow [2024-06-28 00:32:14,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 332 transitions, 4615 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 00:32:14,545 INFO L231 Difference]: Finished difference. Result has 217 places, 309 transitions, 4212 flow [2024-06-28 00:32:14,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3940, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4212, PETRI_PLACES=217, PETRI_TRANSITIONS=309} [2024-06-28 00:32:14,545 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-28 00:32:14,546 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 309 transitions, 4212 flow [2024-06-28 00:32:14,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:14,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:14,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:14,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 00:32:14,546 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:32:14,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:14,547 INFO L85 PathProgramCache]: Analyzing trace with hash -353565909, now seen corresponding path program 3 times [2024-06-28 00:32:14,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:14,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271626773] [2024-06-28 00:32:14,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:14,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:15,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:15,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271626773] [2024-06-28 00:32:15,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271626773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:15,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:15,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:32:15,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975821124] [2024-06-28 00:32:15,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:15,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:32:15,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:15,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:32:15,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:32:15,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:32:15,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 309 transitions, 4212 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:15,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:15,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:32:15,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:16,806 INFO L124 PetriNetUnfolderBase]: 1905/3006 cut-off events. [2024-06-28 00:32:16,807 INFO L125 PetriNetUnfolderBase]: For 193493/193515 co-relation queries the response was YES. [2024-06-28 00:32:16,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25249 conditions, 3006 events. 1905/3006 cut-off events. For 193493/193515 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16112 event pairs, 383 based on Foata normal form. 10/2949 useless extension candidates. Maximal degree in co-relation 25143. Up to 2597 conditions per place. [2024-06-28 00:32:16,839 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 211 selfloop transitions, 58 changer transitions 0/338 dead transitions. [2024-06-28 00:32:16,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 338 transitions, 4874 flow [2024-06-28 00:32:16,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:32:16,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:32:16,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 00:32:16,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-28 00:32:16,841 INFO L175 Difference]: Start difference. First operand has 217 places, 309 transitions, 4212 flow. Second operand 9 states and 172 transitions. [2024-06-28 00:32:16,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 338 transitions, 4874 flow [2024-06-28 00:32:17,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 338 transitions, 4735 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 00:32:17,136 INFO L231 Difference]: Finished difference. Result has 222 places, 313 transitions, 4256 flow [2024-06-28 00:32:17,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4073, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4256, PETRI_PLACES=222, PETRI_TRANSITIONS=313} [2024-06-28 00:32:17,137 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-28 00:32:17,137 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 313 transitions, 4256 flow [2024-06-28 00:32:17,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:17,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:17,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:17,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 00:32:17,138 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:32:17,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:17,138 INFO L85 PathProgramCache]: Analyzing trace with hash -176304809, now seen corresponding path program 1 times [2024-06-28 00:32:17,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:17,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981377100] [2024-06-28 00:32:17,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:17,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:18,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:18,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981377100] [2024-06-28 00:32:18,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981377100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:18,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:18,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:32:18,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830176408] [2024-06-28 00:32:18,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:18,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:32:18,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:18,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:32:18,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:32:19,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:32:19,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 313 transitions, 4256 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:19,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:19,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:32:19,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:19,931 INFO L124 PetriNetUnfolderBase]: 2054/3189 cut-off events. [2024-06-28 00:32:19,931 INFO L125 PetriNetUnfolderBase]: For 193903/193903 co-relation queries the response was YES. [2024-06-28 00:32:19,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26646 conditions, 3189 events. 2054/3189 cut-off events. For 193903/193903 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16710 event pairs, 398 based on Foata normal form. 2/3180 useless extension candidates. Maximal degree in co-relation 26538. Up to 2842 conditions per place. [2024-06-28 00:32:19,968 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 253 selfloop transitions, 92 changer transitions 0/350 dead transitions. [2024-06-28 00:32:19,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 350 transitions, 5361 flow [2024-06-28 00:32:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:32:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:32:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-28 00:32:19,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-28 00:32:19,970 INFO L175 Difference]: Start difference. First operand has 222 places, 313 transitions, 4256 flow. Second operand 9 states and 175 transitions. [2024-06-28 00:32:19,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 350 transitions, 5361 flow [2024-06-28 00:32:20,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 350 transitions, 5224 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 00:32:20,282 INFO L231 Difference]: Finished difference. Result has 226 places, 322 transitions, 4488 flow [2024-06-28 00:32:20,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4119, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4488, PETRI_PLACES=226, PETRI_TRANSITIONS=322} [2024-06-28 00:32:20,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-28 00:32:20,283 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 322 transitions, 4488 flow [2024-06-28 00:32:20,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:20,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:20,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:20,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 00:32:20,284 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:32:20,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:20,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1617697063, now seen corresponding path program 2 times [2024-06-28 00:32:20,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:20,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349147063] [2024-06-28 00:32:20,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:20,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:22,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:22,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349147063] [2024-06-28 00:32:22,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349147063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:22,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:22,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:32:22,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042095382] [2024-06-28 00:32:22,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:22,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:32:22,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:22,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:32:22,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:32:22,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:32:22,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 322 transitions, 4488 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:22,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:22,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:32:22,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:23,346 INFO L124 PetriNetUnfolderBase]: 2065/3205 cut-off events. [2024-06-28 00:32:23,346 INFO L125 PetriNetUnfolderBase]: For 202875/202875 co-relation queries the response was YES. [2024-06-28 00:32:23,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27325 conditions, 3205 events. 2065/3205 cut-off events. For 202875/202875 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16816 event pairs, 398 based on Foata normal form. 2/3196 useless extension candidates. Maximal degree in co-relation 27215. Up to 2907 conditions per place. [2024-06-28 00:32:23,380 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 264 selfloop transitions, 82 changer transitions 0/351 dead transitions. [2024-06-28 00:32:23,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 351 transitions, 5335 flow [2024-06-28 00:32:23,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:32:23,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:32:23,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-28 00:32:23,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-28 00:32:23,382 INFO L175 Difference]: Start difference. First operand has 226 places, 322 transitions, 4488 flow. Second operand 10 states and 182 transitions. [2024-06-28 00:32:23,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 351 transitions, 5335 flow [2024-06-28 00:32:23,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 351 transitions, 5165 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-28 00:32:23,788 INFO L231 Difference]: Finished difference. Result has 231 places, 325 transitions, 4564 flow [2024-06-28 00:32:23,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4330, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4564, PETRI_PLACES=231, PETRI_TRANSITIONS=325} [2024-06-28 00:32:23,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-28 00:32:23,789 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 325 transitions, 4564 flow [2024-06-28 00:32:23,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:23,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:23,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:23,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 00:32:23,789 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)] === [2024-06-28 00:32:23,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:23,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1193756179, now seen corresponding path program 3 times [2024-06-28 00:32:23,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:23,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942145719] [2024-06-28 00:32:23,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:23,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:25,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:25,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942145719] [2024-06-28 00:32:25,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942145719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:25,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:25,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:32:25,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651164066] [2024-06-28 00:32:25,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:25,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:32:25,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:25,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:32:25,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:32:25,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:32:25,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 325 transitions, 4564 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:25,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:25,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:32:25,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:26,868 INFO L124 PetriNetUnfolderBase]: 2076/3211 cut-off events. [2024-06-28 00:32:26,868 INFO L125 PetriNetUnfolderBase]: For 209249/209249 co-relation queries the response was YES. [2024-06-28 00:32:26,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27719 conditions, 3211 events. 2076/3211 cut-off events. For 209249/209249 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16784 event pairs, 423 based on Foata normal form. 2/3202 useless extension candidates. Maximal degree in co-relation 27607. Up to 2923 conditions per place. [2024-06-28 00:32:26,906 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 270 selfloop transitions, 79 changer transitions 0/354 dead transitions. [2024-06-28 00:32:26,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 354 transitions, 5411 flow [2024-06-28 00:32:26,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:32:26,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:32:26,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-28 00:32:26,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-28 00:32:26,908 INFO L175 Difference]: Start difference. First operand has 231 places, 325 transitions, 4564 flow. Second operand 10 states and 183 transitions. [2024-06-28 00:32:26,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 354 transitions, 5411 flow [2024-06-28 00:32:27,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 354 transitions, 5226 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-28 00:32:27,245 INFO L231 Difference]: Finished difference. Result has 234 places, 328 transitions, 4613 flow [2024-06-28 00:32:27,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4379, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4613, PETRI_PLACES=234, PETRI_TRANSITIONS=328} [2024-06-28 00:32:27,245 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-28 00:32:27,245 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 328 transitions, 4613 flow [2024-06-28 00:32:27,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:27,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:27,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:27,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 00:32:27,246 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)] === [2024-06-28 00:32:27,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:27,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1794828583, now seen corresponding path program 4 times [2024-06-28 00:32:27,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:27,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254044878] [2024-06-28 00:32:27,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:27,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:28,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:28,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254044878] [2024-06-28 00:32:28,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254044878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:28,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:28,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:32:28,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186121842] [2024-06-28 00:32:28,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:28,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:32:28,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:28,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:32:28,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:32:29,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:32:29,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 328 transitions, 4613 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:29,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:29,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:32:29,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:29,870 INFO L124 PetriNetUnfolderBase]: 2071/3218 cut-off events. [2024-06-28 00:32:29,870 INFO L125 PetriNetUnfolderBase]: For 217024/217024 co-relation queries the response was YES. [2024-06-28 00:32:29,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27708 conditions, 3218 events. 2071/3218 cut-off events. For 217024/217024 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16915 event pairs, 408 based on Foata normal form. 2/3209 useless extension candidates. Maximal degree in co-relation 27595. Up to 2981 conditions per place. [2024-06-28 00:32:29,908 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 290 selfloop transitions, 59 changer transitions 0/354 dead transitions. [2024-06-28 00:32:29,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 354 transitions, 5397 flow [2024-06-28 00:32:29,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:32:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:32:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 00:32:29,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-28 00:32:29,909 INFO L175 Difference]: Start difference. First operand has 234 places, 328 transitions, 4613 flow. Second operand 9 states and 170 transitions. [2024-06-28 00:32:29,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 354 transitions, 5397 flow [2024-06-28 00:32:30,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 354 transitions, 5174 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-28 00:32:30,312 INFO L231 Difference]: Finished difference. Result has 235 places, 328 transitions, 4521 flow [2024-06-28 00:32:30,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4390, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4521, PETRI_PLACES=235, PETRI_TRANSITIONS=328} [2024-06-28 00:32:30,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-28 00:32:30,314 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 328 transitions, 4521 flow [2024-06-28 00:32:30,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:30,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:30,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:30,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 00:32:30,314 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:32:30,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:30,315 INFO L85 PathProgramCache]: Analyzing trace with hash 826222233, now seen corresponding path program 1 times [2024-06-28 00:32:30,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:30,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988591525] [2024-06-28 00:32:30,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:30,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:31,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:31,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988591525] [2024-06-28 00:32:31,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988591525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:31,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:31,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:32:31,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058295000] [2024-06-28 00:32:31,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:31,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:32:31,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:31,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:32:31,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:32:31,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:32:31,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 328 transitions, 4521 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-28 00:32:31,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:31,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:32:31,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:32,750 INFO L124 PetriNetUnfolderBase]: 2102/3267 cut-off events. [2024-06-28 00:32:32,750 INFO L125 PetriNetUnfolderBase]: For 227290/227290 co-relation queries the response was YES. [2024-06-28 00:32:32,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28123 conditions, 3267 events. 2102/3267 cut-off events. For 227290/227290 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17204 event pairs, 432 based on Foata normal form. 2/3263 useless extension candidates. Maximal degree in co-relation 28009. Up to 3068 conditions per place. [2024-06-28 00:32:32,790 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 310 selfloop transitions, 44 changer transitions 0/359 dead transitions. [2024-06-28 00:32:32,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 359 transitions, 5643 flow [2024-06-28 00:32:32,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:32:32,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:32:32,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 00:32:32,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 00:32:32,792 INFO L175 Difference]: Start difference. First operand has 235 places, 328 transitions, 4521 flow. Second operand 9 states and 162 transitions. [2024-06-28 00:32:32,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 359 transitions, 5643 flow [2024-06-28 00:32:33,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 359 transitions, 5482 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-28 00:32:33,141 INFO L231 Difference]: Finished difference. Result has 237 places, 340 transitions, 4623 flow [2024-06-28 00:32:33,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4360, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4623, PETRI_PLACES=237, PETRI_TRANSITIONS=340} [2024-06-28 00:32:33,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-28 00:32:33,142 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 340 transitions, 4623 flow [2024-06-28 00:32:33,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-28 00:32:33,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:33,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:33,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 00:32:33,142 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:32:33,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:33,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1847787487, now seen corresponding path program 4 times [2024-06-28 00:32:33,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:33,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375267045] [2024-06-28 00:32:33,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:33,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:34,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:34,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375267045] [2024-06-28 00:32:34,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375267045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:34,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:34,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:32:34,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441927825] [2024-06-28 00:32:34,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:34,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:32:34,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:34,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:32:34,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:32:34,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:32:34,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 340 transitions, 4623 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:34,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:34,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:32:34,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:35,867 INFO L124 PetriNetUnfolderBase]: 2013/3151 cut-off events. [2024-06-28 00:32:35,867 INFO L125 PetriNetUnfolderBase]: For 250380/250437 co-relation queries the response was YES. [2024-06-28 00:32:35,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28044 conditions, 3151 events. 2013/3151 cut-off events. For 250380/250437 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16913 event pairs, 401 based on Foata normal form. 10/3084 useless extension candidates. Maximal degree in co-relation 27929. Up to 2658 conditions per place. [2024-06-28 00:32:35,903 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 179 selfloop transitions, 112 changer transitions 0/365 dead transitions. [2024-06-28 00:32:35,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 365 transitions, 5323 flow [2024-06-28 00:32:35,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:32:35,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:32:35,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 00:32:35,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-28 00:32:35,905 INFO L175 Difference]: Start difference. First operand has 237 places, 340 transitions, 4623 flow. Second operand 9 states and 171 transitions. [2024-06-28 00:32:35,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 365 transitions, 5323 flow [2024-06-28 00:32:36,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 365 transitions, 5212 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-28 00:32:36,210 INFO L231 Difference]: Finished difference. Result has 242 places, 342 transitions, 4788 flow [2024-06-28 00:32:36,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4512, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4788, PETRI_PLACES=242, PETRI_TRANSITIONS=342} [2024-06-28 00:32:36,210 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-28 00:32:36,210 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 342 transitions, 4788 flow [2024-06-28 00:32:36,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:36,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:36,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:36,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 00:32:36,211 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:32:36,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:36,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1854221537, now seen corresponding path program 5 times [2024-06-28 00:32:36,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:36,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632878295] [2024-06-28 00:32:36,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:36,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:38,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:38,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632878295] [2024-06-28 00:32:38,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632878295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:38,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:38,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:32:38,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219629822] [2024-06-28 00:32:38,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:38,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:32:38,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:38,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:32:38,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:32:38,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:32:38,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 342 transitions, 4788 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:38,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:38,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:32:38,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:39,284 INFO L124 PetriNetUnfolderBase]: 2138/3310 cut-off events. [2024-06-28 00:32:39,284 INFO L125 PetriNetUnfolderBase]: For 245358/245358 co-relation queries the response was YES. [2024-06-28 00:32:39,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29252 conditions, 3310 events. 2138/3310 cut-off events. For 245358/245358 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17404 event pairs, 441 based on Foata normal form. 2/3293 useless extension candidates. Maximal degree in co-relation 29136. Up to 2845 conditions per place. [2024-06-28 00:32:39,324 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 244 selfloop transitions, 122 changer transitions 0/371 dead transitions. [2024-06-28 00:32:39,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 371 transitions, 5674 flow [2024-06-28 00:32:39,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:32:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:32:39,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-28 00:32:39,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-28 00:32:39,326 INFO L175 Difference]: Start difference. First operand has 242 places, 342 transitions, 4788 flow. Second operand 10 states and 184 transitions. [2024-06-28 00:32:39,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 371 transitions, 5674 flow [2024-06-28 00:32:39,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 371 transitions, 5418 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-28 00:32:39,702 INFO L231 Difference]: Finished difference. Result has 245 places, 345 transitions, 4854 flow [2024-06-28 00:32:39,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4532, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4854, PETRI_PLACES=245, PETRI_TRANSITIONS=345} [2024-06-28 00:32:39,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-28 00:32:39,702 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 345 transitions, 4854 flow [2024-06-28 00:32:39,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:39,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:39,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:39,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 00:32:39,703 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:32:39,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:39,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1501139775, now seen corresponding path program 6 times [2024-06-28 00:32:39,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:39,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300899774] [2024-06-28 00:32:39,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:39,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:41,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:41,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300899774] [2024-06-28 00:32:41,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300899774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:41,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:41,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:32:41,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071532315] [2024-06-28 00:32:41,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:41,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:32:41,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:41,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:32:41,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:32:41,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:32:41,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 345 transitions, 4854 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:41,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:41,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:32:41,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:42,893 INFO L124 PetriNetUnfolderBase]: 2165/3354 cut-off events. [2024-06-28 00:32:42,894 INFO L125 PetriNetUnfolderBase]: For 258182/258182 co-relation queries the response was YES. [2024-06-28 00:32:42,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30117 conditions, 3354 events. 2165/3354 cut-off events. For 258182/258182 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17707 event pairs, 441 based on Foata normal form. 2/3337 useless extension candidates. Maximal degree in co-relation 30000. Up to 2863 conditions per place. [2024-06-28 00:32:42,932 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 241 selfloop transitions, 133 changer transitions 0/379 dead transitions. [2024-06-28 00:32:42,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 379 transitions, 6042 flow [2024-06-28 00:32:42,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:32:42,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:32:42,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-28 00:32:42,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-28 00:32:42,934 INFO L175 Difference]: Start difference. First operand has 245 places, 345 transitions, 4854 flow. Second operand 10 states and 186 transitions. [2024-06-28 00:32:42,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 379 transitions, 6042 flow [2024-06-28 00:32:43,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 379 transitions, 5744 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-28 00:32:43,311 INFO L231 Difference]: Finished difference. Result has 247 places, 351 transitions, 4976 flow [2024-06-28 00:32:43,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4556, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4976, PETRI_PLACES=247, PETRI_TRANSITIONS=351} [2024-06-28 00:32:43,312 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-28 00:32:43,312 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 351 transitions, 4976 flow [2024-06-28 00:32:43,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:43,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:43,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:43,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 00:32:43,313 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)] === [2024-06-28 00:32:43,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:43,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1216039905, now seen corresponding path program 7 times [2024-06-28 00:32:43,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:43,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023235214] [2024-06-28 00:32:43,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:43,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:44,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:44,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023235214] [2024-06-28 00:32:44,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023235214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:44,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:44,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:32:44,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636102211] [2024-06-28 00:32:44,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:44,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:32:44,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:44,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:32:44,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:32:45,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:32:45,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 351 transitions, 4976 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:45,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:45,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:32:45,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:46,017 INFO L124 PetriNetUnfolderBase]: 2192/3398 cut-off events. [2024-06-28 00:32:46,017 INFO L125 PetriNetUnfolderBase]: For 272285/272285 co-relation queries the response was YES. [2024-06-28 00:32:46,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31041 conditions, 3398 events. 2192/3398 cut-off events. For 272285/272285 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18002 event pairs, 441 based on Foata normal form. 2/3381 useless extension candidates. Maximal degree in co-relation 30923. Up to 2903 conditions per place. [2024-06-28 00:32:46,059 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 241 selfloop transitions, 139 changer transitions 0/385 dead transitions. [2024-06-28 00:32:46,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 385 transitions, 6192 flow [2024-06-28 00:32:46,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:32:46,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:32:46,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-28 00:32:46,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47696476964769646 [2024-06-28 00:32:46,060 INFO L175 Difference]: Start difference. First operand has 247 places, 351 transitions, 4976 flow. Second operand 9 states and 176 transitions. [2024-06-28 00:32:46,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 385 transitions, 6192 flow [2024-06-28 00:32:46,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 385 transitions, 5976 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-28 00:32:46,618 INFO L231 Difference]: Finished difference. Result has 251 places, 357 transitions, 5218 flow [2024-06-28 00:32:46,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4772, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5218, PETRI_PLACES=251, PETRI_TRANSITIONS=357} [2024-06-28 00:32:46,619 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-28 00:32:46,619 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 357 transitions, 5218 flow [2024-06-28 00:32:46,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:46,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:46,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:46,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 00:32:46,619 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)] === [2024-06-28 00:32:46,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:46,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1854458687, now seen corresponding path program 8 times [2024-06-28 00:32:46,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:46,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467055515] [2024-06-28 00:32:46,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:46,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:46,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:48,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:48,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467055515] [2024-06-28 00:32:48,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467055515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:48,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:48,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:32:48,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756188263] [2024-06-28 00:32:48,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:48,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:32:48,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:48,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:32:48,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:32:48,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:32:48,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 357 transitions, 5218 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:48,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:48,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:32:48,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:49,360 INFO L124 PetriNetUnfolderBase]: 2219/3442 cut-off events. [2024-06-28 00:32:49,361 INFO L125 PetriNetUnfolderBase]: For 287247/287247 co-relation queries the response was YES. [2024-06-28 00:32:49,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32282 conditions, 3442 events. 2219/3442 cut-off events. For 287247/287247 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18304 event pairs, 441 based on Foata normal form. 2/3425 useless extension candidates. Maximal degree in co-relation 32161. Up to 2933 conditions per place. [2024-06-28 00:32:49,403 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 256 selfloop transitions, 130 changer transitions 0/391 dead transitions. [2024-06-28 00:32:49,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 391 transitions, 6450 flow [2024-06-28 00:32:49,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:32:49,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:32:49,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 00:32:49,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-28 00:32:49,405 INFO L175 Difference]: Start difference. First operand has 251 places, 357 transitions, 5218 flow. Second operand 9 states and 177 transitions. [2024-06-28 00:32:49,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 391 transitions, 6450 flow [2024-06-28 00:32:49,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 391 transitions, 6112 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 00:32:49,993 INFO L231 Difference]: Finished difference. Result has 255 places, 363 transitions, 5324 flow [2024-06-28 00:32:49,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4880, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5324, PETRI_PLACES=255, PETRI_TRANSITIONS=363} [2024-06-28 00:32:49,994 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-28 00:32:49,994 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 363 transitions, 5324 flow [2024-06-28 00:32:49,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:49,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:49,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:49,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 00:32:49,994 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)] === [2024-06-28 00:32:49,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:49,995 INFO L85 PathProgramCache]: Analyzing trace with hash -2008704937, now seen corresponding path program 9 times [2024-06-28 00:32:49,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:49,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196680899] [2024-06-28 00:32:49,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:49,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:51,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:51,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196680899] [2024-06-28 00:32:51,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196680899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:51,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:51,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:32:51,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696526110] [2024-06-28 00:32:51,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:51,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:32:51,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:51,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:32:51,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:32:51,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:32:51,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 363 transitions, 5324 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:51,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:51,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:32:51,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:53,134 INFO L124 PetriNetUnfolderBase]: 2214/3435 cut-off events. [2024-06-28 00:32:53,134 INFO L125 PetriNetUnfolderBase]: For 296138/296138 co-relation queries the response was YES. [2024-06-28 00:32:53,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32482 conditions, 3435 events. 2214/3435 cut-off events. For 296138/296138 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18282 event pairs, 441 based on Foata normal form. 2/3418 useless extension candidates. Maximal degree in co-relation 32359. Up to 2955 conditions per place. [2024-06-28 00:32:53,173 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 250 selfloop transitions, 134 changer transitions 0/389 dead transitions. [2024-06-28 00:32:53,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 389 transitions, 6182 flow [2024-06-28 00:32:53,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:32:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:32:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-28 00:32:53,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-28 00:32:53,175 INFO L175 Difference]: Start difference. First operand has 255 places, 363 transitions, 5324 flow. Second operand 10 states and 182 transitions. [2024-06-28 00:32:53,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 389 transitions, 6182 flow [2024-06-28 00:32:53,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 389 transitions, 5816 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-28 00:32:53,721 INFO L231 Difference]: Finished difference. Result has 259 places, 363 transitions, 5234 flow [2024-06-28 00:32:53,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4958, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5234, PETRI_PLACES=259, PETRI_TRANSITIONS=363} [2024-06-28 00:32:53,721 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-28 00:32:53,722 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 363 transitions, 5234 flow [2024-06-28 00:32:53,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:53,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:53,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:53,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 00:32:53,722 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)] === [2024-06-28 00:32:53,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:53,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1376715245, now seen corresponding path program 10 times [2024-06-28 00:32:53,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:53,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125712530] [2024-06-28 00:32:53,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:53,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:55,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:55,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125712530] [2024-06-28 00:32:55,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125712530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:55,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:55,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:32:55,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190594775] [2024-06-28 00:32:55,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:55,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:32:55,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:55,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:32:55,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:32:55,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:32:55,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 363 transitions, 5234 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:55,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:55,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:32:55,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:32:56,821 INFO L124 PetriNetUnfolderBase]: 2209/3428 cut-off events. [2024-06-28 00:32:56,821 INFO L125 PetriNetUnfolderBase]: For 300868/300868 co-relation queries the response was YES. [2024-06-28 00:32:56,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32295 conditions, 3428 events. 2209/3428 cut-off events. For 300868/300868 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18234 event pairs, 441 based on Foata normal form. 2/3411 useless extension candidates. Maximal degree in co-relation 32171. Up to 2948 conditions per place. [2024-06-28 00:32:56,862 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 261 selfloop transitions, 123 changer transitions 0/389 dead transitions. [2024-06-28 00:32:56,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 389 transitions, 6092 flow [2024-06-28 00:32:56,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:32:56,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:32:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-28 00:32:56,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-28 00:32:56,864 INFO L175 Difference]: Start difference. First operand has 259 places, 363 transitions, 5234 flow. Second operand 10 states and 183 transitions. [2024-06-28 00:32:56,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 389 transitions, 6092 flow [2024-06-28 00:32:57,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 389 transitions, 5780 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-28 00:32:57,408 INFO L231 Difference]: Finished difference. Result has 260 places, 363 transitions, 5176 flow [2024-06-28 00:32:57,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4922, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5176, PETRI_PLACES=260, PETRI_TRANSITIONS=363} [2024-06-28 00:32:57,409 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-28 00:32:57,409 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 363 transitions, 5176 flow [2024-06-28 00:32:57,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:32:57,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:32:57,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:32:57,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 00:32:57,410 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)] === [2024-06-28 00:32:57,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:32:57,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1210452663, now seen corresponding path program 2 times [2024-06-28 00:32:57,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:32:57,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131265515] [2024-06-28 00:32:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:32:57,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:32:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:32:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:32:59,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:32:59,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131265515] [2024-06-28 00:32:59,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131265515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:32:59,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:32:59,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:32:59,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260901893] [2024-06-28 00:32:59,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:32:59,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:32:59,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:32:59,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:32:59,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:32:59,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:32:59,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 363 transitions, 5176 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-28 00:32:59,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:32:59,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:32:59,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:00,168 INFO L124 PetriNetUnfolderBase]: 2219/3450 cut-off events. [2024-06-28 00:33:00,169 INFO L125 PetriNetUnfolderBase]: For 311206/311206 co-relation queries the response was YES. [2024-06-28 00:33:00,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32460 conditions, 3450 events. 2219/3450 cut-off events. For 311206/311206 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18444 event pairs, 577 based on Foata normal form. 2/3449 useless extension candidates. Maximal degree in co-relation 32335. Up to 3293 conditions per place. [2024-06-28 00:33:00,216 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 350 selfloop transitions, 20 changer transitions 0/375 dead transitions. [2024-06-28 00:33:00,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 375 transitions, 5984 flow [2024-06-28 00:33:00,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:33:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:33:00,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 00:33:00,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-28 00:33:00,217 INFO L175 Difference]: Start difference. First operand has 260 places, 363 transitions, 5176 flow. Second operand 7 states and 120 transitions. [2024-06-28 00:33:00,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 375 transitions, 5984 flow [2024-06-28 00:33:00,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 375 transitions, 5708 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-28 00:33:00,922 INFO L231 Difference]: Finished difference. Result has 258 places, 366 transitions, 4997 flow [2024-06-28 00:33:00,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4900, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4997, PETRI_PLACES=258, PETRI_TRANSITIONS=366} [2024-06-28 00:33:00,922 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-28 00:33:00,923 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 366 transitions, 4997 flow [2024-06-28 00:33:00,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-28 00:33:00,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:00,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:00,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 00:33:00,924 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:33:00,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:00,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1210007193, now seen corresponding path program 3 times [2024-06-28 00:33:00,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:00,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444533028] [2024-06-28 00:33:00,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:00,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:02,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:02,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444533028] [2024-06-28 00:33:02,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444533028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:02,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:02,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:33:02,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170809767] [2024-06-28 00:33:02,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:02,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:33:02,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:02,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:33:02,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:33:02,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:33:02,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 366 transitions, 4997 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-28 00:33:02,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:02,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:33:02,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:03,455 INFO L124 PetriNetUnfolderBase]: 2213/3439 cut-off events. [2024-06-28 00:33:03,456 INFO L125 PetriNetUnfolderBase]: For 314546/314546 co-relation queries the response was YES. [2024-06-28 00:33:03,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32063 conditions, 3439 events. 2213/3439 cut-off events. For 314546/314546 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18325 event pairs, 461 based on Foata normal form. 2/3433 useless extension candidates. Maximal degree in co-relation 31937. Up to 3231 conditions per place. [2024-06-28 00:33:03,500 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 328 selfloop transitions, 48 changer transitions 0/381 dead transitions. [2024-06-28 00:33:03,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 381 transitions, 5909 flow [2024-06-28 00:33:03,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:33:03,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:33:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-28 00:33:03,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-28 00:33:03,501 INFO L175 Difference]: Start difference. First operand has 258 places, 366 transitions, 4997 flow. Second operand 9 states and 156 transitions. [2024-06-28 00:33:03,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 381 transitions, 5909 flow [2024-06-28 00:33:04,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 381 transitions, 5798 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-28 00:33:04,136 INFO L231 Difference]: Finished difference. Result has 260 places, 366 transitions, 4988 flow [2024-06-28 00:33:04,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4886, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4988, PETRI_PLACES=260, PETRI_TRANSITIONS=366} [2024-06-28 00:33:04,137 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-28 00:33:04,137 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 366 transitions, 4988 flow [2024-06-28 00:33:04,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-28 00:33:04,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:04,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:04,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 00:33:04,138 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)] === [2024-06-28 00:33:04,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:04,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1392931149, now seen corresponding path program 5 times [2024-06-28 00:33:04,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:04,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224258298] [2024-06-28 00:33:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:04,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:05,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:05,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224258298] [2024-06-28 00:33:05,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224258298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:05,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:05,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:33:05,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181829175] [2024-06-28 00:33:05,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:05,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:33:05,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:05,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:33:05,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:33:05,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:33:05,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 366 transitions, 4988 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:05,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:05,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:33:05,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:06,684 INFO L124 PetriNetUnfolderBase]: 2125/3356 cut-off events. [2024-06-28 00:33:06,684 INFO L125 PetriNetUnfolderBase]: For 344101/344150 co-relation queries the response was YES. [2024-06-28 00:33:06,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31936 conditions, 3356 events. 2125/3356 cut-off events. For 344101/344150 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 18399 event pairs, 383 based on Foata normal form. 10/3305 useless extension candidates. Maximal degree in co-relation 31813. Up to 2889 conditions per place. [2024-06-28 00:33:06,728 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 241 selfloop transitions, 77 changer transitions 0/399 dead transitions. [2024-06-28 00:33:06,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 399 transitions, 5770 flow [2024-06-28 00:33:06,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:33:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:33:06,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-28 00:33:06,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823848238482385 [2024-06-28 00:33:06,729 INFO L175 Difference]: Start difference. First operand has 260 places, 366 transitions, 4988 flow. Second operand 9 states and 178 transitions. [2024-06-28 00:33:06,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 399 transitions, 5770 flow [2024-06-28 00:33:07,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 399 transitions, 5660 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 00:33:07,360 INFO L231 Difference]: Finished difference. Result has 261 places, 370 transitions, 5106 flow [2024-06-28 00:33:07,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4878, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5106, PETRI_PLACES=261, PETRI_TRANSITIONS=370} [2024-06-28 00:33:07,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-28 00:33:07,361 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 370 transitions, 5106 flow [2024-06-28 00:33:07,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:07,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:07,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:07,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 00:33:07,362 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)] === [2024-06-28 00:33:07,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:07,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1823464213, now seen corresponding path program 6 times [2024-06-28 00:33:07,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:07,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845055219] [2024-06-28 00:33:07,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:07,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:08,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:08,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845055219] [2024-06-28 00:33:08,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845055219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:08,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:08,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:33:08,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938016628] [2024-06-28 00:33:08,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:08,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:33:08,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:08,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:33:08,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:33:08,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:33:08,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 370 transitions, 5106 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:08,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:08,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:33:08,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:09,709 INFO L124 PetriNetUnfolderBase]: 2173/3438 cut-off events. [2024-06-28 00:33:09,709 INFO L125 PetriNetUnfolderBase]: For 353786/353856 co-relation queries the response was YES. [2024-06-28 00:33:09,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32603 conditions, 3438 events. 2173/3438 cut-off events. For 353786/353856 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19135 event pairs, 381 based on Foata normal form. 29/3397 useless extension candidates. Maximal degree in co-relation 32479. Up to 2950 conditions per place. [2024-06-28 00:33:09,752 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 262 selfloop transitions, 66 changer transitions 0/409 dead transitions. [2024-06-28 00:33:09,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 409 transitions, 5944 flow [2024-06-28 00:33:09,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:33:09,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:33:09,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-28 00:33:09,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48509485094850946 [2024-06-28 00:33:09,754 INFO L175 Difference]: Start difference. First operand has 261 places, 370 transitions, 5106 flow. Second operand 9 states and 179 transitions. [2024-06-28 00:33:09,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 409 transitions, 5944 flow [2024-06-28 00:33:10,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 409 transitions, 5764 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-28 00:33:10,398 INFO L231 Difference]: Finished difference. Result has 264 places, 378 transitions, 5176 flow [2024-06-28 00:33:10,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4926, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5176, PETRI_PLACES=264, PETRI_TRANSITIONS=378} [2024-06-28 00:33:10,398 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-28 00:33:10,399 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 378 transitions, 5176 flow [2024-06-28 00:33:10,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:10,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:10,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:10,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 00:33:10,399 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:33:10,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:10,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2107251477, now seen corresponding path program 7 times [2024-06-28 00:33:10,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:10,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115448694] [2024-06-28 00:33:10,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:10,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:12,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:12,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115448694] [2024-06-28 00:33:12,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115448694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:12,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:12,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:33:12,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399567734] [2024-06-28 00:33:12,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:12,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:33:12,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:12,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:33:12,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:33:12,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:33:12,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 378 transitions, 5176 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:12,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:12,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:33:12,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:13,310 INFO L124 PetriNetUnfolderBase]: 2215/3502 cut-off events. [2024-06-28 00:33:13,310 INFO L125 PetriNetUnfolderBase]: For 372831/372968 co-relation queries the response was YES. [2024-06-28 00:33:13,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33560 conditions, 3502 events. 2215/3502 cut-off events. For 372831/372968 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 19532 event pairs, 397 based on Foata normal form. 28/3455 useless extension candidates. Maximal degree in co-relation 33434. Up to 2979 conditions per place. [2024-06-28 00:33:13,349 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 227 selfloop transitions, 103 changer transitions 0/411 dead transitions. [2024-06-28 00:33:13,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 411 transitions, 5992 flow [2024-06-28 00:33:13,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:33:13,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:33:13,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-28 00:33:13,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823848238482385 [2024-06-28 00:33:13,350 INFO L175 Difference]: Start difference. First operand has 264 places, 378 transitions, 5176 flow. Second operand 9 states and 178 transitions. [2024-06-28 00:33:13,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 411 transitions, 5992 flow [2024-06-28 00:33:14,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 411 transitions, 5836 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 00:33:14,250 INFO L231 Difference]: Finished difference. Result has 267 places, 382 transitions, 5306 flow [2024-06-28 00:33:14,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5020, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5306, PETRI_PLACES=267, PETRI_TRANSITIONS=382} [2024-06-28 00:33:14,251 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-28 00:33:14,251 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 382 transitions, 5306 flow [2024-06-28 00:33:14,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:14,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:14,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:14,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 00:33:14,252 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:33:14,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:14,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1132409299, now seen corresponding path program 11 times [2024-06-28 00:33:14,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:14,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508747410] [2024-06-28 00:33:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:14,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:16,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:16,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508747410] [2024-06-28 00:33:16,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508747410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:16,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:16,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:33:16,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360712045] [2024-06-28 00:33:16,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:16,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:33:16,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:16,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:33:16,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:33:16,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:33:16,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 382 transitions, 5306 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:16,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:16,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:33:16,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:17,392 INFO L124 PetriNetUnfolderBase]: 2408/3739 cut-off events. [2024-06-28 00:33:17,392 INFO L125 PetriNetUnfolderBase]: For 361785/361785 co-relation queries the response was YES. [2024-06-28 00:33:17,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35311 conditions, 3739 events. 2408/3739 cut-off events. For 361785/361785 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20257 event pairs, 463 based on Foata normal form. 2/3737 useless extension candidates. Maximal degree in co-relation 35184. Up to 3394 conditions per place. [2024-06-28 00:33:17,443 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 321 selfloop transitions, 94 changer transitions 0/420 dead transitions. [2024-06-28 00:33:17,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 420 transitions, 6350 flow [2024-06-28 00:33:17,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:33:17,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:33:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-28 00:33:17,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-28 00:33:17,445 INFO L175 Difference]: Start difference. First operand has 267 places, 382 transitions, 5306 flow. Second operand 10 states and 189 transitions. [2024-06-28 00:33:17,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 420 transitions, 6350 flow [2024-06-28 00:33:18,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 420 transitions, 6108 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-28 00:33:18,125 INFO L231 Difference]: Finished difference. Result has 270 places, 388 transitions, 5382 flow [2024-06-28 00:33:18,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5064, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5382, PETRI_PLACES=270, PETRI_TRANSITIONS=388} [2024-06-28 00:33:18,125 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-28 00:33:18,125 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 388 transitions, 5382 flow [2024-06-28 00:33:18,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:18,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:18,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:18,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 00:33:18,126 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:33:18,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:18,127 INFO L85 PathProgramCache]: Analyzing trace with hash 2113685527, now seen corresponding path program 12 times [2024-06-28 00:33:18,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:18,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964178965] [2024-06-28 00:33:18,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:18,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:19,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:19,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964178965] [2024-06-28 00:33:19,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964178965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:19,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:19,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:33:19,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930045783] [2024-06-28 00:33:19,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:19,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:33:19,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:19,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:33:19,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:33:19,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:33:19,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 388 transitions, 5382 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:19,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:19,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:33:19,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:21,140 INFO L124 PetriNetUnfolderBase]: 2410/3742 cut-off events. [2024-06-28 00:33:21,140 INFO L125 PetriNetUnfolderBase]: For 372742/372742 co-relation queries the response was YES. [2024-06-28 00:33:21,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35488 conditions, 3742 events. 2410/3742 cut-off events. For 372742/372742 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20382 event pairs, 463 based on Foata normal form. 2/3740 useless extension candidates. Maximal degree in co-relation 35360. Up to 3397 conditions per place. [2024-06-28 00:33:21,184 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 322 selfloop transitions, 99 changer transitions 0/426 dead transitions. [2024-06-28 00:33:21,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 426 transitions, 6444 flow [2024-06-28 00:33:21,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:33:21,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:33:21,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-28 00:33:21,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-28 00:33:21,186 INFO L175 Difference]: Start difference. First operand has 270 places, 388 transitions, 5382 flow. Second operand 10 states and 188 transitions. [2024-06-28 00:33:21,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 426 transitions, 6444 flow [2024-06-28 00:33:21,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 426 transitions, 6188 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-28 00:33:21,990 INFO L231 Difference]: Finished difference. Result has 272 places, 394 transitions, 5460 flow [2024-06-28 00:33:21,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5126, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5460, PETRI_PLACES=272, PETRI_TRANSITIONS=394} [2024-06-28 00:33:21,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-28 00:33:21,991 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 394 transitions, 5460 flow [2024-06-28 00:33:21,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:21,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:21,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:21,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 00:33:21,992 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:33:21,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:21,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2113922677, now seen corresponding path program 13 times [2024-06-28 00:33:21,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:21,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217420739] [2024-06-28 00:33:21,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:21,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:23,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:23,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:23,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217420739] [2024-06-28 00:33:23,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217420739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:23,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:23,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:33:23,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719973730] [2024-06-28 00:33:23,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:23,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:33:23,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:23,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:33:23,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:33:23,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:33:23,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 394 transitions, 5460 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:23,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:23,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:33:23,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:24,899 INFO L124 PetriNetUnfolderBase]: 2412/3748 cut-off events. [2024-06-28 00:33:24,899 INFO L125 PetriNetUnfolderBase]: For 380698/380698 co-relation queries the response was YES. [2024-06-28 00:33:24,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35733 conditions, 3748 events. 2412/3748 cut-off events. For 380698/380698 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 20400 event pairs, 463 based on Foata normal form. 2/3746 useless extension candidates. Maximal degree in co-relation 35604. Up to 3333 conditions per place. [2024-06-28 00:33:24,945 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 303 selfloop transitions, 121 changer transitions 0/429 dead transitions. [2024-06-28 00:33:24,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 429 transitions, 6437 flow [2024-06-28 00:33:24,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:33:24,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:33:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-28 00:33:24,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-28 00:33:24,947 INFO L175 Difference]: Start difference. First operand has 272 places, 394 transitions, 5460 flow. Second operand 10 states and 189 transitions. [2024-06-28 00:33:24,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 429 transitions, 6437 flow [2024-06-28 00:33:26,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 429 transitions, 6143 flow, removed 52 selfloop flow, removed 8 redundant places. [2024-06-28 00:33:26,032 INFO L231 Difference]: Finished difference. Result has 274 places, 397 transitions, 5447 flow [2024-06-28 00:33:26,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5166, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5447, PETRI_PLACES=274, PETRI_TRANSITIONS=397} [2024-06-28 00:33:26,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-28 00:33:26,033 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 397 transitions, 5447 flow [2024-06-28 00:33:26,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:26,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:26,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:26,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 00:33:26,034 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:33:26,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:26,034 INFO L85 PathProgramCache]: Analyzing trace with hash -838136713, now seen corresponding path program 8 times [2024-06-28 00:33:26,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:26,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345026566] [2024-06-28 00:33:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:26,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:27,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:27,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345026566] [2024-06-28 00:33:27,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345026566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:27,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:27,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:33:27,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825074092] [2024-06-28 00:33:27,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:27,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:33:27,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:27,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:33:27,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:33:27,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:33:27,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 397 transitions, 5447 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:27,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:27,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:33:27,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:28,274 INFO L124 PetriNetUnfolderBase]: 2307/3663 cut-off events. [2024-06-28 00:33:28,275 INFO L125 PetriNetUnfolderBase]: For 406989/407188 co-relation queries the response was YES. [2024-06-28 00:33:28,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34868 conditions, 3663 events. 2307/3663 cut-off events. For 406989/407188 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 20802 event pairs, 430 based on Foata normal form. 61/3644 useless extension candidates. Maximal degree in co-relation 34738. Up to 3134 conditions per place. [2024-06-28 00:33:28,319 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 283 selfloop transitions, 73 changer transitions 0/442 dead transitions. [2024-06-28 00:33:28,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 442 transitions, 6399 flow [2024-06-28 00:33:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:33:28,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:33:28,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-28 00:33:28,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48509485094850946 [2024-06-28 00:33:28,321 INFO L175 Difference]: Start difference. First operand has 274 places, 397 transitions, 5447 flow. Second operand 9 states and 179 transitions. [2024-06-28 00:33:28,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 442 transitions, 6399 flow [2024-06-28 00:33:29,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 442 transitions, 6080 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-28 00:33:29,008 INFO L231 Difference]: Finished difference. Result has 275 places, 409 transitions, 5455 flow [2024-06-28 00:33:29,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5128, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5455, PETRI_PLACES=275, PETRI_TRANSITIONS=409} [2024-06-28 00:33:29,009 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-28 00:33:29,009 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 409 transitions, 5455 flow [2024-06-28 00:33:29,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:29,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:29,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:29,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 00:33:29,010 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:33:29,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:29,010 INFO L85 PathProgramCache]: Analyzing trace with hash -548190613, now seen corresponding path program 9 times [2024-06-28 00:33:29,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:29,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023258736] [2024-06-28 00:33:29,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:29,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:30,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:30,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023258736] [2024-06-28 00:33:30,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023258736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:30,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:30,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:33:30,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012277029] [2024-06-28 00:33:30,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:30,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:33:30,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:30,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:33:30,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:33:30,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:33:30,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 409 transitions, 5455 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:30,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:30,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:33:30,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:31,546 INFO L124 PetriNetUnfolderBase]: 2358/3763 cut-off events. [2024-06-28 00:33:31,546 INFO L125 PetriNetUnfolderBase]: For 423971/424252 co-relation queries the response was YES. [2024-06-28 00:33:31,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35809 conditions, 3763 events. 2358/3763 cut-off events. For 423971/424252 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 21615 event pairs, 465 based on Foata normal form. 62/3749 useless extension candidates. Maximal degree in co-relation 35677. Up to 3248 conditions per place. [2024-06-28 00:33:31,589 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 278 selfloop transitions, 82 changer transitions 0/446 dead transitions. [2024-06-28 00:33:31,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 446 transitions, 6361 flow [2024-06-28 00:33:31,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:33:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:33:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-28 00:33:31,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823848238482385 [2024-06-28 00:33:31,590 INFO L175 Difference]: Start difference. First operand has 275 places, 409 transitions, 5455 flow. Second operand 9 states and 178 transitions. [2024-06-28 00:33:31,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 446 transitions, 6361 flow [2024-06-28 00:33:32,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 446 transitions, 6192 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 00:33:32,276 INFO L231 Difference]: Finished difference. Result has 278 places, 415 transitions, 5562 flow [2024-06-28 00:33:32,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5286, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5562, PETRI_PLACES=278, PETRI_TRANSITIONS=415} [2024-06-28 00:33:32,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-28 00:33:32,277 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 415 transitions, 5562 flow [2024-06-28 00:33:32,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:32,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:32,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:32,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 00:33:32,277 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:33:32,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:32,277 INFO L85 PathProgramCache]: Analyzing trace with hash -279087877, now seen corresponding path program 10 times [2024-06-28 00:33:32,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:32,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076495643] [2024-06-28 00:33:32,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:32,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:33,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:33,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076495643] [2024-06-28 00:33:33,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076495643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:33,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:33,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:33:33,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972006055] [2024-06-28 00:33:33,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:33,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:33:33,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:33,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:33:33,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:33:33,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-28 00:33:33,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 415 transitions, 5562 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:33,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:33,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-28 00:33:33,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:34,367 INFO L124 PetriNetUnfolderBase]: 2018/3404 cut-off events. [2024-06-28 00:33:34,368 INFO L125 PetriNetUnfolderBase]: For 422291/422761 co-relation queries the response was YES. [2024-06-28 00:33:34,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32295 conditions, 3404 events. 2018/3404 cut-off events. For 422291/422761 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 20911 event pairs, 307 based on Foata normal form. 208/3513 useless extension candidates. Maximal degree in co-relation 32162. Up to 2208 conditions per place. [2024-06-28 00:33:34,415 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 173 selfloop transitions, 95 changer transitions 0/453 dead transitions. [2024-06-28 00:33:34,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 453 transitions, 6330 flow [2024-06-28 00:33:34,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:33:34,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:33:34,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-28 00:33:34,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-28 00:33:34,417 INFO L175 Difference]: Start difference. First operand has 278 places, 415 transitions, 5562 flow. Second operand 8 states and 178 transitions. [2024-06-28 00:33:34,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 453 transitions, 6330 flow [2024-06-28 00:33:35,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 453 transitions, 6130 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-28 00:33:35,265 INFO L231 Difference]: Finished difference. Result has 280 places, 426 transitions, 5783 flow [2024-06-28 00:33:35,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5362, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5783, PETRI_PLACES=280, PETRI_TRANSITIONS=426} [2024-06-28 00:33:35,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-28 00:33:35,265 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 426 transitions, 5783 flow [2024-06-28 00:33:35,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:35,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:35,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:35,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 00:33:35,266 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)] === [2024-06-28 00:33:35,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:35,266 INFO L85 PathProgramCache]: Analyzing trace with hash -229281545, now seen corresponding path program 4 times [2024-06-28 00:33:35,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:35,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790783352] [2024-06-28 00:33:35,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:35,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:36,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:36,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790783352] [2024-06-28 00:33:36,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790783352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:36,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:36,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:33:36,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260805219] [2024-06-28 00:33:36,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:36,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:33:36,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:36,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:33:36,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:33:36,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:33:36,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 426 transitions, 5783 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-28 00:33:36,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:36,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:33:36,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:37,882 INFO L124 PetriNetUnfolderBase]: 2669/4161 cut-off events. [2024-06-28 00:33:37,882 INFO L125 PetriNetUnfolderBase]: For 422845/422845 co-relation queries the response was YES. [2024-06-28 00:33:37,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39213 conditions, 4161 events. 2669/4161 cut-off events. For 422845/422845 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 23418 event pairs, 663 based on Foata normal form. 2/4160 useless extension candidates. Maximal degree in co-relation 39078. Up to 3960 conditions per place. [2024-06-28 00:33:37,933 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 36 changer transitions 0/448 dead transitions. [2024-06-28 00:33:37,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 448 transitions, 6748 flow [2024-06-28 00:33:37,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:33:37,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:33:37,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-28 00:33:37,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-28 00:33:37,935 INFO L175 Difference]: Start difference. First operand has 280 places, 426 transitions, 5783 flow. Second operand 7 states and 136 transitions. [2024-06-28 00:33:37,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 448 transitions, 6748 flow [2024-06-28 00:33:38,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 448 transitions, 6573 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-28 00:33:38,819 INFO L231 Difference]: Finished difference. Result has 283 places, 429 transitions, 5715 flow [2024-06-28 00:33:38,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5612, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5715, PETRI_PLACES=283, PETRI_TRANSITIONS=429} [2024-06-28 00:33:38,819 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-28 00:33:38,819 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 429 transitions, 5715 flow [2024-06-28 00:33:38,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-28 00:33:38,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:38,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:38,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 00:33:38,820 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)] === [2024-06-28 00:33:38,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:38,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1032970781, now seen corresponding path program 1 times [2024-06-28 00:33:38,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:38,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886842227] [2024-06-28 00:33:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:38,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:40,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:40,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886842227] [2024-06-28 00:33:40,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886842227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:40,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:40,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:33:40,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384035053] [2024-06-28 00:33:40,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:40,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:33:40,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:40,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:33:40,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:33:40,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:33:40,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 429 transitions, 5715 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:40,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:40,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:33:40,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:41,084 INFO L124 PetriNetUnfolderBase]: 2606/4101 cut-off events. [2024-06-28 00:33:41,084 INFO L125 PetriNetUnfolderBase]: For 430774/430930 co-relation queries the response was YES. [2024-06-28 00:33:41,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38327 conditions, 4101 events. 2606/4101 cut-off events. For 430774/430930 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23528 event pairs, 805 based on Foata normal form. 2/4085 useless extension candidates. Maximal degree in co-relation 38192. Up to 3714 conditions per place. [2024-06-28 00:33:41,141 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 365 selfloop transitions, 30 changer transitions 0/455 dead transitions. [2024-06-28 00:33:41,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 455 transitions, 6929 flow [2024-06-28 00:33:41,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:33:41,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:33:41,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-28 00:33:41,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47735191637630664 [2024-06-28 00:33:41,143 INFO L175 Difference]: Start difference. First operand has 283 places, 429 transitions, 5715 flow. Second operand 7 states and 137 transitions. [2024-06-28 00:33:41,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 455 transitions, 6929 flow [2024-06-28 00:33:42,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 455 transitions, 6855 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 00:33:42,115 INFO L231 Difference]: Finished difference. Result has 286 places, 438 transitions, 5826 flow [2024-06-28 00:33:42,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5641, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5826, PETRI_PLACES=286, PETRI_TRANSITIONS=438} [2024-06-28 00:33:42,116 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-28 00:33:42,116 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 438 transitions, 5826 flow [2024-06-28 00:33:42,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:42,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:42,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:42,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 00:33:42,117 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)] === [2024-06-28 00:33:42,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:42,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1033090751, now seen corresponding path program 2 times [2024-06-28 00:33:42,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:42,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937838942] [2024-06-28 00:33:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:42,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:43,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:43,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937838942] [2024-06-28 00:33:43,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937838942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:43,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:43,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:33:43,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300296724] [2024-06-28 00:33:43,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:43,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:33:43,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:43,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:33:43,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:33:43,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:33:43,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 438 transitions, 5826 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) [2024-06-28 00:33:43,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:43,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:33:43,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:44,531 INFO L124 PetriNetUnfolderBase]: 2689/4189 cut-off events. [2024-06-28 00:33:44,532 INFO L125 PetriNetUnfolderBase]: For 431423/431423 co-relation queries the response was YES. [2024-06-28 00:33:44,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39270 conditions, 4189 events. 2689/4189 cut-off events. For 431423/431423 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23644 event pairs, 836 based on Foata normal form. 1/4187 useless extension candidates. Maximal degree in co-relation 39132. Up to 4010 conditions per place. [2024-06-28 00:33:44,588 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 425 selfloop transitions, 26 changer transitions 0/456 dead transitions. [2024-06-28 00:33:44,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 456 transitions, 6863 flow [2024-06-28 00:33:44,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:33:44,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:33:44,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 00:33:44,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-28 00:33:44,590 INFO L175 Difference]: Start difference. First operand has 286 places, 438 transitions, 5826 flow. Second operand 8 states and 137 transitions. [2024-06-28 00:33:44,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 456 transitions, 6863 flow [2024-06-28 00:33:45,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 456 transitions, 6826 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-28 00:33:45,721 INFO L231 Difference]: Finished difference. Result has 292 places, 444 transitions, 5950 flow [2024-06-28 00:33:45,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5789, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5950, PETRI_PLACES=292, PETRI_TRANSITIONS=444} [2024-06-28 00:33:45,721 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-28 00:33:45,721 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 444 transitions, 5950 flow [2024-06-28 00:33:45,721 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) [2024-06-28 00:33:45,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:45,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:45,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 00:33:45,722 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)] === [2024-06-28 00:33:45,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:45,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1033090937, now seen corresponding path program 1 times [2024-06-28 00:33:45,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:45,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759176947] [2024-06-28 00:33:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:45,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:47,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:47,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759176947] [2024-06-28 00:33:47,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759176947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:47,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:47,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:33:47,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111892643] [2024-06-28 00:33:47,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:47,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:33:47,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:47,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:33:47,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:33:47,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:33:47,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 444 transitions, 5950 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-28 00:33:47,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:47,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:33:47,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:48,478 INFO L124 PetriNetUnfolderBase]: 2694/4198 cut-off events. [2024-06-28 00:33:48,478 INFO L125 PetriNetUnfolderBase]: For 434665/434665 co-relation queries the response was YES. [2024-06-28 00:33:48,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39358 conditions, 4198 events. 2694/4198 cut-off events. For 434665/434665 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23668 event pairs, 835 based on Foata normal form. 1/4196 useless extension candidates. Maximal degree in co-relation 39218. Up to 4013 conditions per place. [2024-06-28 00:33:48,526 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 427 selfloop transitions, 28 changer transitions 0/460 dead transitions. [2024-06-28 00:33:48,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 460 transitions, 7095 flow [2024-06-28 00:33:48,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:33:48,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:33:48,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 00:33:48,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-28 00:33:48,527 INFO L175 Difference]: Start difference. First operand has 292 places, 444 transitions, 5950 flow. Second operand 7 states and 128 transitions. [2024-06-28 00:33:48,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 460 transitions, 7095 flow [2024-06-28 00:33:49,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 460 transitions, 6993 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 00:33:49,327 INFO L231 Difference]: Finished difference. Result has 294 places, 447 transitions, 5965 flow [2024-06-28 00:33:49,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5848, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5965, PETRI_PLACES=294, PETRI_TRANSITIONS=447} [2024-06-28 00:33:49,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-28 00:33:49,327 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 447 transitions, 5965 flow [2024-06-28 00:33:49,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-28 00:33:49,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:49,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:49,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 00:33:49,328 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)] === [2024-06-28 00:33:49,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:49,329 INFO L85 PathProgramCache]: Analyzing trace with hash -773430731, now seen corresponding path program 3 times [2024-06-28 00:33:49,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:49,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616218481] [2024-06-28 00:33:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:49,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:50,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:50,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616218481] [2024-06-28 00:33:50,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616218481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:50,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:50,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:33:50,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753881670] [2024-06-28 00:33:50,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:50,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:33:50,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:50,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:33:50,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:33:50,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:33:50,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 447 transitions, 5965 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:50,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:50,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:33:50,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:51,724 INFO L124 PetriNetUnfolderBase]: 2627/4131 cut-off events. [2024-06-28 00:33:51,724 INFO L125 PetriNetUnfolderBase]: For 456939/457107 co-relation queries the response was YES. [2024-06-28 00:33:51,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39087 conditions, 4131 events. 2627/4131 cut-off events. For 456939/457107 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23619 event pairs, 805 based on Foata normal form. 2/4118 useless extension candidates. Maximal degree in co-relation 38947. Up to 3764 conditions per place. [2024-06-28 00:33:51,784 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 375 selfloop transitions, 23 changer transitions 0/460 dead transitions. [2024-06-28 00:33:51,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 460 transitions, 6965 flow [2024-06-28 00:33:51,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:33:51,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:33:51,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 00:33:51,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-28 00:33:51,785 INFO L175 Difference]: Start difference. First operand has 294 places, 447 transitions, 5965 flow. Second operand 7 states and 127 transitions. [2024-06-28 00:33:51,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 460 transitions, 6965 flow [2024-06-28 00:33:52,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 460 transitions, 6869 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 00:33:52,724 INFO L231 Difference]: Finished difference. Result has 296 places, 450 transitions, 5963 flow [2024-06-28 00:33:52,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5869, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5963, PETRI_PLACES=296, PETRI_TRANSITIONS=450} [2024-06-28 00:33:52,725 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-28 00:33:52,725 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 450 transitions, 5963 flow [2024-06-28 00:33:52,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:52,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:52,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:52,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 00:33:52,726 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)] === [2024-06-28 00:33:52,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:52,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1210222457, now seen corresponding path program 2 times [2024-06-28 00:33:52,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:52,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768383483] [2024-06-28 00:33:52,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:52,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:53,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:53,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768383483] [2024-06-28 00:33:53,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768383483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:53,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:53,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:33:53,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962606793] [2024-06-28 00:33:53,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:53,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:33:53,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:53,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:33:53,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:33:54,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:33:54,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 450 transitions, 5963 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-28 00:33:54,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:54,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:33:54,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:55,119 INFO L124 PetriNetUnfolderBase]: 2693/4195 cut-off events. [2024-06-28 00:33:55,120 INFO L125 PetriNetUnfolderBase]: For 450256/450256 co-relation queries the response was YES. [2024-06-28 00:33:55,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39404 conditions, 4195 events. 2693/4195 cut-off events. For 450256/450256 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 23606 event pairs, 833 based on Foata normal form. 1/4193 useless extension candidates. Maximal degree in co-relation 39263. Up to 4028 conditions per place. [2024-06-28 00:33:55,176 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 433 selfloop transitions, 20 changer transitions 0/458 dead transitions. [2024-06-28 00:33:55,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 458 transitions, 6893 flow [2024-06-28 00:33:55,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:33:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:33:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-28 00:33:55,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 00:33:55,177 INFO L175 Difference]: Start difference. First operand has 296 places, 450 transitions, 5963 flow. Second operand 6 states and 108 transitions. [2024-06-28 00:33:55,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 458 transitions, 6893 flow [2024-06-28 00:33:56,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 458 transitions, 6803 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-28 00:33:56,162 INFO L231 Difference]: Finished difference. Result has 297 places, 450 transitions, 5925 flow [2024-06-28 00:33:56,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5873, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5925, PETRI_PLACES=297, PETRI_TRANSITIONS=450} [2024-06-28 00:33:56,163 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-28 00:33:56,163 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 450 transitions, 5925 flow [2024-06-28 00:33:56,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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) [2024-06-28 00:33:56,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:56,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:56,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 00:33:56,163 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)] === [2024-06-28 00:33:56,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:56,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1210468535, now seen corresponding path program 1 times [2024-06-28 00:33:56,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:56,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003851238] [2024-06-28 00:33:56,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:56,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:58,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:58,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003851238] [2024-06-28 00:33:58,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003851238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:58,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:58,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:33:58,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213858734] [2024-06-28 00:33:58,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:58,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:33:58,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:58,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:33:58,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:33:58,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:33:58,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 450 transitions, 5925 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:33:58,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:58,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:33:58,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:59,547 INFO L124 PetriNetUnfolderBase]: 2688/4188 cut-off events. [2024-06-28 00:33:59,548 INFO L125 PetriNetUnfolderBase]: For 457484/457484 co-relation queries the response was YES. [2024-06-28 00:33:59,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39298 conditions, 4188 events. 2688/4188 cut-off events. For 457484/457484 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 23550 event pairs, 832 based on Foata normal form. 2/4187 useless extension candidates. Maximal degree in co-relation 39156. Up to 4021 conditions per place. [2024-06-28 00:33:59,607 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 440 selfloop transitions, 16 changer transitions 0/461 dead transitions. [2024-06-28 00:33:59,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 461 transitions, 6889 flow [2024-06-28 00:33:59,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:33:59,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:33:59,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 00:33:59,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-28 00:33:59,608 INFO L175 Difference]: Start difference. First operand has 297 places, 450 transitions, 5925 flow. Second operand 7 states and 118 transitions. [2024-06-28 00:33:59,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 461 transitions, 6889 flow [2024-06-28 00:34:00,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 461 transitions, 6857 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 00:34:00,842 INFO L231 Difference]: Finished difference. Result has 300 places, 452 transitions, 5960 flow [2024-06-28 00:34:00,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5893, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5960, PETRI_PLACES=300, PETRI_TRANSITIONS=452} [2024-06-28 00:34:00,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-28 00:34:00,843 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 452 transitions, 5960 flow [2024-06-28 00:34:00,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:00,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:00,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:00,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 00:34:00,844 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:00,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:00,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1191691616, now seen corresponding path program 1 times [2024-06-28 00:34:00,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:00,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064011510] [2024-06-28 00:34:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:00,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:02,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:02,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:02,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064011510] [2024-06-28 00:34:02,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064011510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:02,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:02,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:34:02,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607764582] [2024-06-28 00:34:02,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:02,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:34:02,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:02,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:34:02,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:34:03,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:34:03,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 452 transitions, 5960 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:03,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:03,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:34:03,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:04,491 INFO L124 PetriNetUnfolderBase]: 2705/4206 cut-off events. [2024-06-28 00:34:04,491 INFO L125 PetriNetUnfolderBase]: For 469518/469518 co-relation queries the response was YES. [2024-06-28 00:34:04,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39736 conditions, 4206 events. 2705/4206 cut-off events. For 469518/469518 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 23526 event pairs, 522 based on Foata normal form. 4/4199 useless extension candidates. Maximal degree in co-relation 39592. Up to 3872 conditions per place. [2024-06-28 00:34:04,556 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 398 selfloop transitions, 78 changer transitions 0/481 dead transitions. [2024-06-28 00:34:04,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 481 transitions, 7056 flow [2024-06-28 00:34:04,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:34:04,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:34:04,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-28 00:34:04,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-28 00:34:04,557 INFO L175 Difference]: Start difference. First operand has 300 places, 452 transitions, 5960 flow. Second operand 10 states and 183 transitions. [2024-06-28 00:34:04,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 481 transitions, 7056 flow [2024-06-28 00:34:05,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 481 transitions, 7005 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 00:34:05,980 INFO L231 Difference]: Finished difference. Result has 305 places, 454 transitions, 6131 flow [2024-06-28 00:34:05,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5909, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6131, PETRI_PLACES=305, PETRI_TRANSITIONS=454} [2024-06-28 00:34:05,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-28 00:34:05,981 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 454 transitions, 6131 flow [2024-06-28 00:34:05,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:05,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:05,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:05,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 00:34:05,981 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:05,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:05,982 INFO L85 PathProgramCache]: Analyzing trace with hash 351697888, now seen corresponding path program 2 times [2024-06-28 00:34:05,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:05,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420650818] [2024-06-28 00:34:05,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:05,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:07,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:07,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420650818] [2024-06-28 00:34:07,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420650818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:07,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:07,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:34:07,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085212128] [2024-06-28 00:34:07,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:07,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:34:07,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:07,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:34:07,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:34:07,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:34:07,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 454 transitions, 6131 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:07,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:07,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:34:07,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:09,228 INFO L124 PetriNetUnfolderBase]: 2747/4272 cut-off events. [2024-06-28 00:34:09,229 INFO L125 PetriNetUnfolderBase]: For 495671/495671 co-relation queries the response was YES. [2024-06-28 00:34:09,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41081 conditions, 4272 events. 2747/4272 cut-off events. For 495671/495671 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 23891 event pairs, 518 based on Foata normal form. 4/4265 useless extension candidates. Maximal degree in co-relation 40936. Up to 3854 conditions per place. [2024-06-28 00:34:09,289 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 403 selfloop transitions, 82 changer transitions 0/490 dead transitions. [2024-06-28 00:34:09,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 490 transitions, 7605 flow [2024-06-28 00:34:09,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:34:09,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:34:09,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-28 00:34:09,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-28 00:34:09,291 INFO L175 Difference]: Start difference. First operand has 305 places, 454 transitions, 6131 flow. Second operand 10 states and 186 transitions. [2024-06-28 00:34:09,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 490 transitions, 7605 flow [2024-06-28 00:34:10,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 490 transitions, 7403 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-28 00:34:10,366 INFO L231 Difference]: Finished difference. Result has 308 places, 460 transitions, 6249 flow [2024-06-28 00:34:10,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5929, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6249, PETRI_PLACES=308, PETRI_TRANSITIONS=460} [2024-06-28 00:34:10,367 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-28 00:34:10,367 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 460 transitions, 6249 flow [2024-06-28 00:34:10,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:10,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:10,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:10,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 00:34:10,368 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:10,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:10,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1390993406, now seen corresponding path program 3 times [2024-06-28 00:34:10,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:10,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046546625] [2024-06-28 00:34:10,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:10,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:12,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:12,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046546625] [2024-06-28 00:34:12,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046546625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:12,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:12,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:34:12,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670636400] [2024-06-28 00:34:12,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:12,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:34:12,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:12,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:34:12,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:34:12,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:34:12,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 460 transitions, 6249 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:12,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:12,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:34:12,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:13,807 INFO L124 PetriNetUnfolderBase]: 2739/4260 cut-off events. [2024-06-28 00:34:13,807 INFO L125 PetriNetUnfolderBase]: For 500367/500367 co-relation queries the response was YES. [2024-06-28 00:34:13,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41078 conditions, 4260 events. 2739/4260 cut-off events. For 500367/500367 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 23866 event pairs, 532 based on Foata normal form. 4/4253 useless extension candidates. Maximal degree in co-relation 40931. Up to 3926 conditions per place. [2024-06-28 00:34:13,862 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 402 selfloop transitions, 81 changer transitions 0/488 dead transitions. [2024-06-28 00:34:13,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 488 transitions, 7352 flow [2024-06-28 00:34:13,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:34:13,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:34:13,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-28 00:34:13,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-28 00:34:13,863 INFO L175 Difference]: Start difference. First operand has 308 places, 460 transitions, 6249 flow. Second operand 10 states and 182 transitions. [2024-06-28 00:34:13,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 488 transitions, 7352 flow [2024-06-28 00:34:15,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 488 transitions, 7120 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-28 00:34:15,026 INFO L231 Difference]: Finished difference. Result has 312 places, 461 transitions, 6236 flow [2024-06-28 00:34:15,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6057, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6236, PETRI_PLACES=312, PETRI_TRANSITIONS=461} [2024-06-28 00:34:15,027 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-28 00:34:15,027 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 461 transitions, 6236 flow [2024-06-28 00:34:15,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:15,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:15,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:15,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 00:34:15,027 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:15,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:15,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1072638914, now seen corresponding path program 4 times [2024-06-28 00:34:15,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:15,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942555866] [2024-06-28 00:34:15,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:15,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:16,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:16,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942555866] [2024-06-28 00:34:16,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942555866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:16,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:16,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:34:16,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698082146] [2024-06-28 00:34:16,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:16,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:34:16,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:16,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:34:16,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:34:16,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:34:16,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 461 transitions, 6236 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:16,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:16,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:34:16,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:17,932 INFO L124 PetriNetUnfolderBase]: 2781/4330 cut-off events. [2024-06-28 00:34:17,933 INFO L125 PetriNetUnfolderBase]: For 520036/520036 co-relation queries the response was YES. [2024-06-28 00:34:17,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41866 conditions, 4330 events. 2781/4330 cut-off events. For 520036/520036 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 24341 event pairs, 548 based on Foata normal form. 4/4323 useless extension candidates. Maximal degree in co-relation 41717. Up to 3980 conditions per place. [2024-06-28 00:34:17,996 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 436 selfloop transitions, 57 changer transitions 0/498 dead transitions. [2024-06-28 00:34:17,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 498 transitions, 7752 flow [2024-06-28 00:34:17,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:34:17,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:34:17,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-28 00:34:17,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-28 00:34:17,998 INFO L175 Difference]: Start difference. First operand has 312 places, 461 transitions, 6236 flow. Second operand 10 states and 184 transitions. [2024-06-28 00:34:17,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 498 transitions, 7752 flow [2024-06-28 00:34:19,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 498 transitions, 7590 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 00:34:19,297 INFO L231 Difference]: Finished difference. Result has 315 places, 468 transitions, 6366 flow [2024-06-28 00:34:19,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6074, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6366, PETRI_PLACES=315, PETRI_TRANSITIONS=468} [2024-06-28 00:34:19,297 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-28 00:34:19,297 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 468 transitions, 6366 flow [2024-06-28 00:34:19,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:19,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:19,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:19,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 00:34:19,298 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:19,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:19,298 INFO L85 PathProgramCache]: Analyzing trace with hash -2139496302, now seen corresponding path program 5 times [2024-06-28 00:34:19,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:19,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927076617] [2024-06-28 00:34:19,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:19,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:20,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:20,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927076617] [2024-06-28 00:34:20,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927076617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:20,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:20,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:34:20,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051001071] [2024-06-28 00:34:20,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:20,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:34:20,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:20,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:34:20,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:34:21,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:34:21,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 468 transitions, 6366 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:21,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:21,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:34:21,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:22,312 INFO L124 PetriNetUnfolderBase]: 2773/4320 cut-off events. [2024-06-28 00:34:22,312 INFO L125 PetriNetUnfolderBase]: For 525230/525230 co-relation queries the response was YES. [2024-06-28 00:34:22,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41865 conditions, 4320 events. 2773/4320 cut-off events. For 525230/525230 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24396 event pairs, 565 based on Foata normal form. 4/4313 useless extension candidates. Maximal degree in co-relation 41714. Up to 4047 conditions per place. [2024-06-28 00:34:22,374 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 436 selfloop transitions, 55 changer transitions 0/496 dead transitions. [2024-06-28 00:34:22,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 496 transitions, 7485 flow [2024-06-28 00:34:22,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:34:22,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:34:22,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-28 00:34:22,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 00:34:22,375 INFO L175 Difference]: Start difference. First operand has 315 places, 468 transitions, 6366 flow. Second operand 10 states and 180 transitions. [2024-06-28 00:34:22,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 496 transitions, 7485 flow [2024-06-28 00:34:23,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 496 transitions, 7235 flow, removed 80 selfloop flow, removed 8 redundant places. [2024-06-28 00:34:23,817 INFO L231 Difference]: Finished difference. Result has 317 places, 469 transitions, 6286 flow [2024-06-28 00:34:23,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6160, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6286, PETRI_PLACES=317, PETRI_TRANSITIONS=469} [2024-06-28 00:34:23,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-28 00:34:23,818 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 469 transitions, 6286 flow [2024-06-28 00:34:23,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:23,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:23,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:23,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 00:34:23,818 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:23,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:23,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1386503828, now seen corresponding path program 6 times [2024-06-28 00:34:23,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:23,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949090102] [2024-06-28 00:34:23,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:23,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:25,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:25,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949090102] [2024-06-28 00:34:25,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949090102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:25,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:25,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:34:25,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385741302] [2024-06-28 00:34:25,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:25,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:34:25,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:25,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:34:25,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:34:25,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:34:25,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 469 transitions, 6286 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:25,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:25,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:34:25,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:26,562 INFO L124 PetriNetUnfolderBase]: 2790/4343 cut-off events. [2024-06-28 00:34:26,562 INFO L125 PetriNetUnfolderBase]: For 532782/532782 co-relation queries the response was YES. [2024-06-28 00:34:26,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41832 conditions, 4343 events. 2790/4343 cut-off events. For 532782/532782 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 24530 event pairs, 507 based on Foata normal form. 4/4336 useless extension candidates. Maximal degree in co-relation 41680. Up to 3984 conditions per place. [2024-06-28 00:34:26,625 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 459 selfloop transitions, 47 changer transitions 0/511 dead transitions. [2024-06-28 00:34:26,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 511 transitions, 7651 flow [2024-06-28 00:34:26,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:34:26,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:34:26,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-28 00:34:26,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44146341463414634 [2024-06-28 00:34:26,626 INFO L175 Difference]: Start difference. First operand has 317 places, 469 transitions, 6286 flow. Second operand 10 states and 181 transitions. [2024-06-28 00:34:26,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 511 transitions, 7651 flow [2024-06-28 00:34:27,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 511 transitions, 7546 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 00:34:27,858 INFO L231 Difference]: Finished difference. Result has 321 places, 481 transitions, 6576 flow [2024-06-28 00:34:27,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6181, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6576, PETRI_PLACES=321, PETRI_TRANSITIONS=481} [2024-06-28 00:34:27,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-28 00:34:27,859 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 481 transitions, 6576 flow [2024-06-28 00:34:27,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:27,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:27,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:27,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 00:34:27,859 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:27,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:27,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2020585518, now seen corresponding path program 1 times [2024-06-28 00:34:27,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:27,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009323412] [2024-06-28 00:34:27,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:27,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:29,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:29,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009323412] [2024-06-28 00:34:29,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009323412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:29,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:29,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:34:29,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501567474] [2024-06-28 00:34:29,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:29,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:34:29,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:29,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:34:29,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:34:30,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:34:30,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 481 transitions, 6576 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:30,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:30,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:34:30,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:31,709 INFO L124 PetriNetUnfolderBase]: 2848/4449 cut-off events. [2024-06-28 00:34:31,710 INFO L125 PetriNetUnfolderBase]: For 586335/586335 co-relation queries the response was YES. [2024-06-28 00:34:31,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43217 conditions, 4449 events. 2848/4449 cut-off events. For 586335/586335 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 25227 event pairs, 532 based on Foata normal form. 16/4454 useless extension candidates. Maximal degree in co-relation 43062. Up to 4014 conditions per place. [2024-06-28 00:34:31,774 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 428 selfloop transitions, 83 changer transitions 0/516 dead transitions. [2024-06-28 00:34:31,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 516 transitions, 7810 flow [2024-06-28 00:34:31,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:34:31,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:34:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-28 00:34:31,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44789356984478934 [2024-06-28 00:34:31,775 INFO L175 Difference]: Start difference. First operand has 321 places, 481 transitions, 6576 flow. Second operand 11 states and 202 transitions. [2024-06-28 00:34:31,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 516 transitions, 7810 flow [2024-06-28 00:34:33,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 516 transitions, 7614 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-28 00:34:33,333 INFO L231 Difference]: Finished difference. Result has 327 places, 482 transitions, 6607 flow [2024-06-28 00:34:33,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6380, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6607, PETRI_PLACES=327, PETRI_TRANSITIONS=482} [2024-06-28 00:34:33,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-28 00:34:33,334 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 482 transitions, 6607 flow [2024-06-28 00:34:33,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:33,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:33,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:33,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 00:34:33,334 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:33,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:33,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1441343006, now seen corresponding path program 2 times [2024-06-28 00:34:33,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:33,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838371369] [2024-06-28 00:34:33,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:33,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:35,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:35,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838371369] [2024-06-28 00:34:35,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838371369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:35,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:35,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:34:35,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369089190] [2024-06-28 00:34:35,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:35,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:34:35,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:35,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:34:35,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:34:35,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:34:35,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 482 transitions, 6607 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:35,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:35,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:34:35,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:37,059 INFO L124 PetriNetUnfolderBase]: 3013/4734 cut-off events. [2024-06-28 00:34:37,060 INFO L125 PetriNetUnfolderBase]: For 636502/636502 co-relation queries the response was YES. [2024-06-28 00:34:37,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46376 conditions, 4734 events. 3013/4734 cut-off events. For 636502/636502 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 27387 event pairs, 518 based on Foata normal form. 12/4735 useless extension candidates. Maximal degree in co-relation 46219. Up to 3915 conditions per place. [2024-06-28 00:34:37,124 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 406 selfloop transitions, 113 changer transitions 0/524 dead transitions. [2024-06-28 00:34:37,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 524 transitions, 8272 flow [2024-06-28 00:34:37,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:34:37,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:34:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-28 00:34:37,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567627494456763 [2024-06-28 00:34:37,126 INFO L175 Difference]: Start difference. First operand has 327 places, 482 transitions, 6607 flow. Second operand 11 states and 206 transitions. [2024-06-28 00:34:37,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 524 transitions, 8272 flow [2024-06-28 00:34:38,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 524 transitions, 8087 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-28 00:34:38,881 INFO L231 Difference]: Finished difference. Result has 330 places, 485 transitions, 6807 flow [2024-06-28 00:34:38,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6422, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6807, PETRI_PLACES=330, PETRI_TRANSITIONS=485} [2024-06-28 00:34:38,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-28 00:34:38,881 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 485 transitions, 6807 flow [2024-06-28 00:34:38,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:38,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:38,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:38,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 00:34:38,882 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:38,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:38,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1812220462, now seen corresponding path program 3 times [2024-06-28 00:34:38,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:38,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520886844] [2024-06-28 00:34:38,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:38,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:41,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:41,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520886844] [2024-06-28 00:34:41,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520886844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:41,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:41,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:34:41,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333638084] [2024-06-28 00:34:41,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:41,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:34:41,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:41,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:34:41,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:34:41,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:34:41,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 485 transitions, 6807 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:41,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:41,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:34:41,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:43,164 INFO L124 PetriNetUnfolderBase]: 3071/4832 cut-off events. [2024-06-28 00:34:43,164 INFO L125 PetriNetUnfolderBase]: For 666161/666161 co-relation queries the response was YES. [2024-06-28 00:34:43,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47639 conditions, 4832 events. 3071/4832 cut-off events. For 666161/666161 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 28272 event pairs, 585 based on Foata normal form. 16/4837 useless extension candidates. Maximal degree in co-relation 47480. Up to 4387 conditions per place. [2024-06-28 00:34:43,232 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 429 selfloop transitions, 86 changer transitions 0/520 dead transitions. [2024-06-28 00:34:43,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 520 transitions, 8054 flow [2024-06-28 00:34:43,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:34:43,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:34:43,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-28 00:34:43,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44567627494456763 [2024-06-28 00:34:43,234 INFO L175 Difference]: Start difference. First operand has 330 places, 485 transitions, 6807 flow. Second operand 11 states and 201 transitions. [2024-06-28 00:34:43,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 520 transitions, 8054 flow [2024-06-28 00:34:45,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 520 transitions, 7873 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-28 00:34:45,088 INFO L231 Difference]: Finished difference. Result has 334 places, 486 transitions, 6864 flow [2024-06-28 00:34:45,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6634, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6864, PETRI_PLACES=334, PETRI_TRANSITIONS=486} [2024-06-28 00:34:45,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-28 00:34:45,089 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 486 transitions, 6864 flow [2024-06-28 00:34:45,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:45,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:45,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:45,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 00:34:45,090 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:45,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:45,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1163331184, now seen corresponding path program 4 times [2024-06-28 00:34:45,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:45,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599243451] [2024-06-28 00:34:45,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:45,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:47,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:47,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599243451] [2024-06-28 00:34:47,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599243451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:47,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:47,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:34:47,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170235336] [2024-06-28 00:34:47,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:47,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:34:47,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:47,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:34:47,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:34:47,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:34:47,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 486 transitions, 6864 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:47,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:47,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:34:47,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:48,999 INFO L124 PetriNetUnfolderBase]: 3129/4930 cut-off events. [2024-06-28 00:34:48,999 INFO L125 PetriNetUnfolderBase]: For 682721/682721 co-relation queries the response was YES. [2024-06-28 00:34:49,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48551 conditions, 4930 events. 3129/4930 cut-off events. For 682721/682721 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 29054 event pairs, 601 based on Foata normal form. 16/4935 useless extension candidates. Maximal degree in co-relation 48390. Up to 4426 conditions per place. [2024-06-28 00:34:49,064 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 408 selfloop transitions, 108 changer transitions 0/521 dead transitions. [2024-06-28 00:34:49,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 521 transitions, 8107 flow [2024-06-28 00:34:49,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:34:49,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:34:49,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-28 00:34:49,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44789356984478934 [2024-06-28 00:34:49,065 INFO L175 Difference]: Start difference. First operand has 334 places, 486 transitions, 6864 flow. Second operand 11 states and 202 transitions. [2024-06-28 00:34:49,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 521 transitions, 8107 flow [2024-06-28 00:34:50,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 521 transitions, 7922 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-28 00:34:50,739 INFO L231 Difference]: Finished difference. Result has 336 places, 487 transitions, 6955 flow [2024-06-28 00:34:50,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6679, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6955, PETRI_PLACES=336, PETRI_TRANSITIONS=487} [2024-06-28 00:34:50,740 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-28 00:34:50,740 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 487 transitions, 6955 flow [2024-06-28 00:34:50,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:50,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:50,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:50,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 00:34:50,741 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:50,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:50,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1072792736, now seen corresponding path program 5 times [2024-06-28 00:34:50,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:50,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756285589] [2024-06-28 00:34:50,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:50,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:52,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:52,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756285589] [2024-06-28 00:34:52,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756285589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:52,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:52,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:34:52,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471256934] [2024-06-28 00:34:52,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:52,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:34:52,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:52,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:34:52,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:34:52,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:34:52,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 487 transitions, 6955 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:52,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:52,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:34:52,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:54,265 INFO L124 PetriNetUnfolderBase]: 3101/4891 cut-off events. [2024-06-28 00:34:54,266 INFO L125 PetriNetUnfolderBase]: For 644873/644873 co-relation queries the response was YES. [2024-06-28 00:34:54,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47053 conditions, 4891 events. 3101/4891 cut-off events. For 644873/644873 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 28731 event pairs, 591 based on Foata normal form. 16/4896 useless extension candidates. Maximal degree in co-relation 46891. Up to 4462 conditions per place. [2024-06-28 00:34:54,500 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 455 selfloop transitions, 61 changer transitions 0/521 dead transitions. [2024-06-28 00:34:54,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 521 transitions, 8147 flow [2024-06-28 00:34:54,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:34:54,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:34:54,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-28 00:34:54,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44124168514412415 [2024-06-28 00:34:54,502 INFO L175 Difference]: Start difference. First operand has 336 places, 487 transitions, 6955 flow. Second operand 11 states and 199 transitions. [2024-06-28 00:34:54,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 521 transitions, 8147 flow [2024-06-28 00:34:56,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 521 transitions, 7906 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-28 00:34:56,520 INFO L231 Difference]: Finished difference. Result has 338 places, 487 transitions, 6846 flow [2024-06-28 00:34:56,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6714, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6846, PETRI_PLACES=338, PETRI_TRANSITIONS=487} [2024-06-28 00:34:56,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-28 00:34:56,521 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 487 transitions, 6846 flow [2024-06-28 00:34:56,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:56,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:56,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:56,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 00:34:56,522 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:56,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:56,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2140316096, now seen corresponding path program 7 times [2024-06-28 00:34:56,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:56,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171605997] [2024-06-28 00:34:56,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:56,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:58,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:58,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171605997] [2024-06-28 00:34:58,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171605997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:58,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:58,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:34:58,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664645101] [2024-06-28 00:34:58,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:58,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:34:58,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:58,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:34:58,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:34:58,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:34:58,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 487 transitions, 6846 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:58,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:58,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:34:58,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:59,933 INFO L124 PetriNetUnfolderBase]: 3118/4910 cut-off events. [2024-06-28 00:34:59,933 INFO L125 PetriNetUnfolderBase]: For 622431/622431 co-relation queries the response was YES. [2024-06-28 00:34:59,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47123 conditions, 4910 events. 3118/4910 cut-off events. For 622431/622431 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 28923 event pairs, 593 based on Foata normal form. 4/4895 useless extension candidates. Maximal degree in co-relation 46960. Up to 4486 conditions per place. [2024-06-28 00:35:00,011 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 406 selfloop transitions, 105 changer transitions 0/516 dead transitions. [2024-06-28 00:35:00,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 516 transitions, 8034 flow [2024-06-28 00:35:00,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:35:00,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:35:00,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-28 00:35:00,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-28 00:35:00,013 INFO L175 Difference]: Start difference. First operand has 338 places, 487 transitions, 6846 flow. Second operand 10 states and 182 transitions. [2024-06-28 00:35:00,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 516 transitions, 8034 flow [2024-06-28 00:35:02,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 516 transitions, 7877 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-28 00:35:02,082 INFO L231 Difference]: Finished difference. Result has 338 places, 489 transitions, 6984 flow [2024-06-28 00:35:02,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6689, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6984, PETRI_PLACES=338, PETRI_TRANSITIONS=489} [2024-06-28 00:35:02,082 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-28 00:35:02,083 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 489 transitions, 6984 flow [2024-06-28 00:35:02,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:02,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:02,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:02,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 00:35:02,083 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:02,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:02,083 INFO L85 PathProgramCache]: Analyzing trace with hash 276857552, now seen corresponding path program 8 times [2024-06-28 00:35:02,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:02,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919686236] [2024-06-28 00:35:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:02,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:03,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:03,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919686236] [2024-06-28 00:35:03,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919686236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:03,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:03,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:35:03,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024915940] [2024-06-28 00:35:03,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:03,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:35:03,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:03,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:35:03,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:35:03,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:35:03,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 489 transitions, 6984 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:03,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:03,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:35:03,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:05,424 INFO L124 PetriNetUnfolderBase]: 3135/4927 cut-off events. [2024-06-28 00:35:05,424 INFO L125 PetriNetUnfolderBase]: For 637292/637292 co-relation queries the response was YES. [2024-06-28 00:35:05,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47697 conditions, 4927 events. 3135/4927 cut-off events. For 637292/637292 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 28886 event pairs, 582 based on Foata normal form. 4/4915 useless extension candidates. Maximal degree in co-relation 47533. Up to 4513 conditions per place. [2024-06-28 00:35:05,487 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 417 selfloop transitions, 96 changer transitions 0/518 dead transitions. [2024-06-28 00:35:05,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 518 transitions, 8180 flow [2024-06-28 00:35:05,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:35:05,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:35:05,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-28 00:35:05,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-28 00:35:05,488 INFO L175 Difference]: Start difference. First operand has 338 places, 489 transitions, 6984 flow. Second operand 10 states and 182 transitions. [2024-06-28 00:35:05,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 518 transitions, 8180 flow [2024-06-28 00:35:07,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 518 transitions, 7903 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-28 00:35:07,520 INFO L231 Difference]: Finished difference. Result has 340 places, 491 transitions, 6988 flow [2024-06-28 00:35:07,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6707, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6988, PETRI_PLACES=340, PETRI_TRANSITIONS=491} [2024-06-28 00:35:07,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-28 00:35:07,521 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 491 transitions, 6988 flow [2024-06-28 00:35:07,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:07,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:07,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:07,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 00:35:07,521 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:07,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:07,522 INFO L85 PathProgramCache]: Analyzing trace with hash 271495172, now seen corresponding path program 9 times [2024-06-28 00:35:07,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:07,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459078808] [2024-06-28 00:35:07,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:07,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:09,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:09,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459078808] [2024-06-28 00:35:09,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459078808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:09,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:09,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:35:09,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145516794] [2024-06-28 00:35:09,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:09,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:35:09,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:09,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:35:09,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:35:09,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:35:09,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 491 transitions, 6988 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:09,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:09,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:35:09,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:11,058 INFO L124 PetriNetUnfolderBase]: 3152/4964 cut-off events. [2024-06-28 00:35:11,058 INFO L125 PetriNetUnfolderBase]: For 654314/654314 co-relation queries the response was YES. [2024-06-28 00:35:11,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48105 conditions, 4964 events. 3152/4964 cut-off events. For 654314/654314 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 29309 event pairs, 598 based on Foata normal form. 4/4952 useless extension candidates. Maximal degree in co-relation 47940. Up to 4444 conditions per place. [2024-06-28 00:35:11,139 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 393 selfloop transitions, 122 changer transitions 0/520 dead transitions. [2024-06-28 00:35:11,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 520 transitions, 8192 flow [2024-06-28 00:35:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:35:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:35:11,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-28 00:35:11,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-28 00:35:11,140 INFO L175 Difference]: Start difference. First operand has 340 places, 491 transitions, 6988 flow. Second operand 10 states and 183 transitions. [2024-06-28 00:35:11,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 520 transitions, 8192 flow [2024-06-28 00:35:13,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 520 transitions, 7929 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-28 00:35:13,252 INFO L231 Difference]: Finished difference. Result has 342 places, 493 transitions, 7062 flow [2024-06-28 00:35:13,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6725, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7062, PETRI_PLACES=342, PETRI_TRANSITIONS=493} [2024-06-28 00:35:13,253 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-28 00:35:13,253 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 493 transitions, 7062 flow [2024-06-28 00:35:13,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:13,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:13,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:13,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 00:35:13,253 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:13,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:13,253 INFO L85 PathProgramCache]: Analyzing trace with hash 271347302, now seen corresponding path program 10 times [2024-06-28 00:35:13,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:13,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106738533] [2024-06-28 00:35:13,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:13,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:15,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:15,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106738533] [2024-06-28 00:35:15,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106738533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:15,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:15,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:35:15,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715608503] [2024-06-28 00:35:15,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:15,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:35:15,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:15,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:35:15,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:35:15,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:35:15,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 493 transitions, 7062 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:15,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:15,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:35:15,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:16,983 INFO L124 PetriNetUnfolderBase]: 3169/4981 cut-off events. [2024-06-28 00:35:16,983 INFO L125 PetriNetUnfolderBase]: For 670344/670344 co-relation queries the response was YES. [2024-06-28 00:35:17,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48618 conditions, 4981 events. 3169/4981 cut-off events. For 670344/670344 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 29414 event pairs, 591 based on Foata normal form. 4/4969 useless extension candidates. Maximal degree in co-relation 48452. Up to 4394 conditions per place. [2024-06-28 00:35:17,050 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 391 selfloop transitions, 129 changer transitions 0/525 dead transitions. [2024-06-28 00:35:17,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 525 transitions, 8346 flow [2024-06-28 00:35:17,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:35:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:35:17,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-28 00:35:17,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-28 00:35:17,052 INFO L175 Difference]: Start difference. First operand has 342 places, 493 transitions, 7062 flow. Second operand 10 states and 184 transitions. [2024-06-28 00:35:17,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 525 transitions, 8346 flow [2024-06-28 00:35:19,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 525 transitions, 8027 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-28 00:35:19,141 INFO L231 Difference]: Finished difference. Result has 345 places, 497 transitions, 7176 flow [2024-06-28 00:35:19,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6743, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7176, PETRI_PLACES=345, PETRI_TRANSITIONS=497} [2024-06-28 00:35:19,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-28 00:35:19,141 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 497 transitions, 7176 flow [2024-06-28 00:35:19,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:19,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:19,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:19,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 00:35:19,142 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:19,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:19,142 INFO L85 PathProgramCache]: Analyzing trace with hash 470802914, now seen corresponding path program 6 times [2024-06-28 00:35:19,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:19,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337622179] [2024-06-28 00:35:19,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:19,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:21,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:21,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337622179] [2024-06-28 00:35:21,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337622179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:21,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:21,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:35:21,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042950191] [2024-06-28 00:35:21,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:21,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:35:21,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:21,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:35:21,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:35:21,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:35:21,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 497 transitions, 7176 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:21,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:21,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:35:21,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:23,028 INFO L124 PetriNetUnfolderBase]: 3227/5089 cut-off events. [2024-06-28 00:35:23,028 INFO L125 PetriNetUnfolderBase]: For 730095/730095 co-relation queries the response was YES. [2024-06-28 00:35:23,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49827 conditions, 5089 events. 3227/5089 cut-off events. For 730095/730095 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 30192 event pairs, 607 based on Foata normal form. 16/5089 useless extension candidates. Maximal degree in co-relation 49659. Up to 4486 conditions per place. [2024-06-28 00:35:23,108 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 404 selfloop transitions, 123 changer transitions 0/532 dead transitions. [2024-06-28 00:35:23,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 532 transitions, 8456 flow [2024-06-28 00:35:23,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:35:23,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:35:23,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-28 00:35:23,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501108647450111 [2024-06-28 00:35:23,109 INFO L175 Difference]: Start difference. First operand has 345 places, 497 transitions, 7176 flow. Second operand 11 states and 203 transitions. [2024-06-28 00:35:23,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 532 transitions, 8456 flow [2024-06-28 00:35:25,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 532 transitions, 8184 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-28 00:35:25,681 INFO L231 Difference]: Finished difference. Result has 350 places, 498 transitions, 7221 flow [2024-06-28 00:35:25,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6904, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7221, PETRI_PLACES=350, PETRI_TRANSITIONS=498} [2024-06-28 00:35:25,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-28 00:35:25,682 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 498 transitions, 7221 flow [2024-06-28 00:35:25,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:25,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:25,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:25,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 00:35:25,682 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:25,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:25,683 INFO L85 PathProgramCache]: Analyzing trace with hash 478421474, now seen corresponding path program 7 times [2024-06-28 00:35:25,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:25,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310843292] [2024-06-28 00:35:25,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:25,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:27,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:27,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310843292] [2024-06-28 00:35:27,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310843292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:27,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:27,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:35:27,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019280038] [2024-06-28 00:35:27,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:27,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:35:27,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:27,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:35:27,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:35:27,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:35:27,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 498 transitions, 7221 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:27,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:27,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:35:27,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:29,140 INFO L124 PetriNetUnfolderBase]: 3354/5312 cut-off events. [2024-06-28 00:35:29,140 INFO L125 PetriNetUnfolderBase]: For 802562/802562 co-relation queries the response was YES. [2024-06-28 00:35:29,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53564 conditions, 5312 events. 3354/5312 cut-off events. For 802562/802562 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 32114 event pairs, 639 based on Foata normal form. 12/5308 useless extension candidates. Maximal degree in co-relation 53394. Up to 4447 conditions per place. [2024-06-28 00:35:29,218 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 400 selfloop transitions, 134 changer transitions 0/539 dead transitions. [2024-06-28 00:35:29,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 539 transitions, 8959 flow [2024-06-28 00:35:29,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:35:29,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:35:29,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-28 00:35:29,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-28 00:35:29,219 INFO L175 Difference]: Start difference. First operand has 350 places, 498 transitions, 7221 flow. Second operand 10 states and 198 transitions. [2024-06-28 00:35:29,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 539 transitions, 8959 flow [2024-06-28 00:35:31,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 539 transitions, 8680 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-28 00:35:31,643 INFO L231 Difference]: Finished difference. Result has 351 places, 500 transitions, 7346 flow [2024-06-28 00:35:31,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6942, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7346, PETRI_PLACES=351, PETRI_TRANSITIONS=500} [2024-06-28 00:35:31,644 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-28 00:35:31,644 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 500 transitions, 7346 flow [2024-06-28 00:35:31,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:31,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:31,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:31,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 00:35:31,644 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:31,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:31,644 INFO L85 PathProgramCache]: Analyzing trace with hash 478154564, now seen corresponding path program 8 times [2024-06-28 00:35:31,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:31,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827015027] [2024-06-28 00:35:31,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:31,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:33,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:33,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827015027] [2024-06-28 00:35:33,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827015027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:33,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:33,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:35:33,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628181521] [2024-06-28 00:35:33,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:33,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:35:33,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:33,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:35:33,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:35:34,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:35:34,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 500 transitions, 7346 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:34,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:34,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:35:34,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:35,831 INFO L124 PetriNetUnfolderBase]: 3412/5410 cut-off events. [2024-06-28 00:35:35,832 INFO L125 PetriNetUnfolderBase]: For 837475/837475 co-relation queries the response was YES. [2024-06-28 00:35:35,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54629 conditions, 5410 events. 3412/5410 cut-off events. For 837475/837475 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32862 event pairs, 653 based on Foata normal form. 16/5410 useless extension candidates. Maximal degree in co-relation 54458. Up to 4770 conditions per place. [2024-06-28 00:35:35,902 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 399 selfloop transitions, 131 changer transitions 0/535 dead transitions. [2024-06-28 00:35:35,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 535 transitions, 8636 flow [2024-06-28 00:35:35,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:35:35,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:35:35,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-28 00:35:35,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523281596452328 [2024-06-28 00:35:35,903 INFO L175 Difference]: Start difference. First operand has 351 places, 500 transitions, 7346 flow. Second operand 11 states and 204 transitions. [2024-06-28 00:35:35,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 535 transitions, 8636 flow [2024-06-28 00:35:38,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 535 transitions, 8412 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-28 00:35:38,279 INFO L231 Difference]: Finished difference. Result has 356 places, 501 transitions, 7459 flow [2024-06-28 00:35:38,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7136, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7459, PETRI_PLACES=356, PETRI_TRANSITIONS=501} [2024-06-28 00:35:38,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-28 00:35:38,280 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 501 transitions, 7459 flow [2024-06-28 00:35:38,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:38,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:38,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:38,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 00:35:38,280 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:38,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:38,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1884530206, now seen corresponding path program 9 times [2024-06-28 00:35:38,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:38,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414508464] [2024-06-28 00:35:38,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:38,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:40,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:40,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414508464] [2024-06-28 00:35:40,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414508464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:40,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:40,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:35:40,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289054399] [2024-06-28 00:35:40,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:40,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:35:40,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:40,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:35:40,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:35:40,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:35:40,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 501 transitions, 7459 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:40,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:40,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:35:40,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:42,264 INFO L124 PetriNetUnfolderBase]: 3539/5633 cut-off events. [2024-06-28 00:35:42,265 INFO L125 PetriNetUnfolderBase]: For 904939/904939 co-relation queries the response was YES. [2024-06-28 00:35:42,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58193 conditions, 5633 events. 3539/5633 cut-off events. For 904939/904939 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 34751 event pairs, 690 based on Foata normal form. 12/5629 useless extension candidates. Maximal degree in co-relation 58020. Up to 4680 conditions per place. [2024-06-28 00:35:42,360 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 335 selfloop transitions, 202 changer transitions 0/542 dead transitions. [2024-06-28 00:35:42,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 542 transitions, 9215 flow [2024-06-28 00:35:42,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:35:42,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:35:42,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-28 00:35:42,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-28 00:35:42,362 INFO L175 Difference]: Start difference. First operand has 356 places, 501 transitions, 7459 flow. Second operand 10 states and 198 transitions. [2024-06-28 00:35:42,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 542 transitions, 9215 flow [2024-06-28 00:35:45,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 542 transitions, 8932 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-28 00:35:45,520 INFO L231 Difference]: Finished difference. Result has 357 places, 503 transitions, 7720 flow [2024-06-28 00:35:45,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7176, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7720, PETRI_PLACES=357, PETRI_TRANSITIONS=503} [2024-06-28 00:35:45,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-28 00:35:45,521 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 503 transitions, 7720 flow [2024-06-28 00:35:45,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:45,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:45,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:45,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 00:35:45,522 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:45,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:45,522 INFO L85 PathProgramCache]: Analyzing trace with hash -957200940, now seen corresponding path program 10 times [2024-06-28 00:35:45,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:45,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208322054] [2024-06-28 00:35:45,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:45,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:47,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:47,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208322054] [2024-06-28 00:35:47,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208322054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:47,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:47,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:35:47,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637160817] [2024-06-28 00:35:47,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:47,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:35:47,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:47,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:35:47,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:35:47,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:35:47,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 503 transitions, 7720 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:47,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:47,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:35:47,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:49,066 INFO L124 PetriNetUnfolderBase]: 3666/5851 cut-off events. [2024-06-28 00:35:49,066 INFO L125 PetriNetUnfolderBase]: For 997265/997265 co-relation queries the response was YES. [2024-06-28 00:35:49,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62164 conditions, 5851 events. 3666/5851 cut-off events. For 997265/997265 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 36528 event pairs, 720 based on Foata normal form. 12/5847 useless extension candidates. Maximal degree in co-relation 61990. Up to 5072 conditions per place. [2024-06-28 00:35:49,160 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 397 selfloop transitions, 142 changer transitions 0/544 dead transitions. [2024-06-28 00:35:49,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 544 transitions, 9488 flow [2024-06-28 00:35:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:35:49,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:35:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-28 00:35:49,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48048780487804876 [2024-06-28 00:35:49,162 INFO L175 Difference]: Start difference. First operand has 357 places, 503 transitions, 7720 flow. Second operand 10 states and 197 transitions. [2024-06-28 00:35:49,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 544 transitions, 9488 flow [2024-06-28 00:35:52,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 544 transitions, 9175 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-28 00:35:52,544 INFO L231 Difference]: Finished difference. Result has 361 places, 505 transitions, 7835 flow [2024-06-28 00:35:52,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7407, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7835, PETRI_PLACES=361, PETRI_TRANSITIONS=505} [2024-06-28 00:35:52,544 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-28 00:35:52,545 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 505 transitions, 7835 flow [2024-06-28 00:35:52,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:52,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:52,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:52,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 00:35:52,545 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:52,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:52,546 INFO L85 PathProgramCache]: Analyzing trace with hash -709306472, now seen corresponding path program 11 times [2024-06-28 00:35:52,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:52,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648619355] [2024-06-28 00:35:52,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:52,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:54,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:54,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648619355] [2024-06-28 00:35:54,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648619355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:54,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:54,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:35:54,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687184250] [2024-06-28 00:35:54,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:54,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:35:54,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:54,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:35:54,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:35:54,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:35:54,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 505 transitions, 7835 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:54,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:54,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:35:54,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:56,732 INFO L124 PetriNetUnfolderBase]: 3638/5807 cut-off events. [2024-06-28 00:35:56,732 INFO L125 PetriNetUnfolderBase]: For 963463/963463 co-relation queries the response was YES. [2024-06-28 00:35:56,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60477 conditions, 5807 events. 3638/5807 cut-off events. For 963463/963463 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 36263 event pairs, 724 based on Foata normal form. 16/5807 useless extension candidates. Maximal degree in co-relation 60301. Up to 4972 conditions per place. [2024-06-28 00:35:56,822 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 334 selfloop transitions, 200 changer transitions 0/539 dead transitions. [2024-06-28 00:35:56,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 539 transitions, 9067 flow [2024-06-28 00:35:56,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:35:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:35:56,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-28 00:35:56,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501108647450111 [2024-06-28 00:35:56,823 INFO L175 Difference]: Start difference. First operand has 361 places, 505 transitions, 7835 flow. Second operand 11 states and 203 transitions. [2024-06-28 00:35:56,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 539 transitions, 9067 flow [2024-06-28 00:36:00,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 539 transitions, 8809 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-28 00:36:00,203 INFO L231 Difference]: Finished difference. Result has 366 places, 505 transitions, 7984 flow [2024-06-28 00:36:00,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7577, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7984, PETRI_PLACES=366, PETRI_TRANSITIONS=505} [2024-06-28 00:36:00,204 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-28 00:36:00,204 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 505 transitions, 7984 flow [2024-06-28 00:36:00,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:00,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:00,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:00,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 00:36:00,204 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:00,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:00,204 INFO L85 PathProgramCache]: Analyzing trace with hash 474380026, now seen corresponding path program 12 times [2024-06-28 00:36:00,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:00,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542545140] [2024-06-28 00:36:00,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:00,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:02,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:02,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542545140] [2024-06-28 00:36:02,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542545140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:02,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:02,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:36:02,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934351548] [2024-06-28 00:36:02,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:02,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:36:02,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:02,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:36:02,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:36:02,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:36:02,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 505 transitions, 7984 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:02,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:02,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:36:02,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:04,167 INFO L124 PetriNetUnfolderBase]: 3696/5905 cut-off events. [2024-06-28 00:36:04,167 INFO L125 PetriNetUnfolderBase]: For 977257/977257 co-relation queries the response was YES. [2024-06-28 00:36:04,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61470 conditions, 5905 events. 3696/5905 cut-off events. For 977257/977257 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 37117 event pairs, 740 based on Foata normal form. 16/5905 useless extension candidates. Maximal degree in co-relation 61292. Up to 5259 conditions per place. [2024-06-28 00:36:04,263 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 395 selfloop transitions, 140 changer transitions 0/540 dead transitions. [2024-06-28 00:36:04,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 540 transitions, 9270 flow [2024-06-28 00:36:04,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:36:04,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:36:04,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-28 00:36:04,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501108647450111 [2024-06-28 00:36:04,265 INFO L175 Difference]: Start difference. First operand has 366 places, 505 transitions, 7984 flow. Second operand 11 states and 203 transitions. [2024-06-28 00:36:04,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 540 transitions, 9270 flow [2024-06-28 00:36:06,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 540 transitions, 8863 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-28 00:36:06,991 INFO L231 Difference]: Finished difference. Result has 367 places, 506 transitions, 7918 flow [2024-06-28 00:36:06,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7577, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7918, PETRI_PLACES=367, PETRI_TRANSITIONS=506} [2024-06-28 00:36:06,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-28 00:36:06,992 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 506 transitions, 7918 flow [2024-06-28 00:36:06,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:06,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:06,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:06,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 00:36:06,992 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:06,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:06,992 INFO L85 PathProgramCache]: Analyzing trace with hash -395340332, now seen corresponding path program 13 times [2024-06-28 00:36:06,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:06,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773083059] [2024-06-28 00:36:06,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:06,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:08,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:08,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773083059] [2024-06-28 00:36:08,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773083059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:08,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:08,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:36:08,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088696972] [2024-06-28 00:36:08,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:08,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:36:08,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:08,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:36:08,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:36:08,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:36:08,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 506 transitions, 7918 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:08,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:08,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:36:08,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:10,732 INFO L124 PetriNetUnfolderBase]: 3798/6089 cut-off events. [2024-06-28 00:36:10,732 INFO L125 PetriNetUnfolderBase]: For 1041060/1041060 co-relation queries the response was YES. [2024-06-28 00:36:10,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64268 conditions, 6089 events. 3798/6089 cut-off events. For 1041060/1041060 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 38451 event pairs, 660 based on Foata normal form. 12/6085 useless extension candidates. Maximal degree in co-relation 64089. Up to 3532 conditions per place. [2024-06-28 00:36:10,827 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 318 selfloop transitions, 225 changer transitions 0/548 dead transitions. [2024-06-28 00:36:10,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 548 transitions, 9712 flow [2024-06-28 00:36:10,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:36:10,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:36:10,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-28 00:36:10,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-28 00:36:10,828 INFO L175 Difference]: Start difference. First operand has 367 places, 506 transitions, 7918 flow. Second operand 10 states and 198 transitions. [2024-06-28 00:36:10,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 548 transitions, 9712 flow [2024-06-28 00:36:13,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 548 transitions, 9411 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-28 00:36:13,779 INFO L231 Difference]: Finished difference. Result has 368 places, 508 transitions, 8215 flow [2024-06-28 00:36:13,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7617, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8215, PETRI_PLACES=368, PETRI_TRANSITIONS=508} [2024-06-28 00:36:13,779 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-28 00:36:13,780 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 508 transitions, 8215 flow [2024-06-28 00:36:13,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:13,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:13,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:13,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 00:36:13,780 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:13,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:13,781 INFO L85 PathProgramCache]: Analyzing trace with hash -964819500, now seen corresponding path program 14 times [2024-06-28 00:36:13,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:13,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780763907] [2024-06-28 00:36:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:13,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:15,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:15,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780763907] [2024-06-28 00:36:15,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780763907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:15,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:15,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:36:15,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943652995] [2024-06-28 00:36:15,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:15,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:36:15,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:15,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:36:15,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:36:16,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:36:16,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 508 transitions, 8215 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:16,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:16,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:36:16,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:17,949 INFO L124 PetriNetUnfolderBase]: 3770/6045 cut-off events. [2024-06-28 00:36:17,949 INFO L125 PetriNetUnfolderBase]: For 1010767/1010767 co-relation queries the response was YES. [2024-06-28 00:36:18,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63029 conditions, 6045 events. 3770/6045 cut-off events. For 1010767/1010767 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 38288 event pairs, 752 based on Foata normal form. 16/6045 useless extension candidates. Maximal degree in co-relation 62849. Up to 5407 conditions per place. [2024-06-28 00:36:18,044 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 402 selfloop transitions, 135 changer transitions 0/542 dead transitions. [2024-06-28 00:36:18,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 542 transitions, 9453 flow [2024-06-28 00:36:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:36:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:36:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-28 00:36:18,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44567627494456763 [2024-06-28 00:36:18,046 INFO L175 Difference]: Start difference. First operand has 368 places, 508 transitions, 8215 flow. Second operand 11 states and 201 transitions. [2024-06-28 00:36:18,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 542 transitions, 9453 flow [2024-06-28 00:36:21,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 542 transitions, 9111 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-28 00:36:21,336 INFO L231 Difference]: Finished difference. Result has 373 places, 508 transitions, 8150 flow [2024-06-28 00:36:21,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7873, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8150, PETRI_PLACES=373, PETRI_TRANSITIONS=508} [2024-06-28 00:36:21,337 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-28 00:36:21,337 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 508 transitions, 8150 flow [2024-06-28 00:36:21,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:21,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:21,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:21,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 00:36:21,337 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:21,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:21,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1446991768, now seen corresponding path program 15 times [2024-06-28 00:36:21,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:21,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332610640] [2024-06-28 00:36:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:21,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:23,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:23,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332610640] [2024-06-28 00:36:23,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332610640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:23,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:23,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:36:23,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014483038] [2024-06-28 00:36:23,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:23,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:36:23,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:23,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:36:23,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:36:24,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:36:24,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 508 transitions, 8150 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:24,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:24,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:36:24,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:26,282 INFO L124 PetriNetUnfolderBase]: 3742/6001 cut-off events. [2024-06-28 00:36:26,283 INFO L125 PetriNetUnfolderBase]: For 941211/941211 co-relation queries the response was YES. [2024-06-28 00:36:26,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60595 conditions, 6001 events. 3742/6001 cut-off events. For 941211/941211 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 38049 event pairs, 742 based on Foata normal form. 16/6001 useless extension candidates. Maximal degree in co-relation 60413. Up to 5363 conditions per place. [2024-06-28 00:36:26,372 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 413 selfloop transitions, 124 changer transitions 0/542 dead transitions. [2024-06-28 00:36:26,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 542 transitions, 9388 flow [2024-06-28 00:36:26,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:36:26,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:36:26,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-28 00:36:26,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44789356984478934 [2024-06-28 00:36:26,374 INFO L175 Difference]: Start difference. First operand has 373 places, 508 transitions, 8150 flow. Second operand 11 states and 202 transitions. [2024-06-28 00:36:26,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 542 transitions, 9388 flow [2024-06-28 00:36:30,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 542 transitions, 9088 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-28 00:36:30,293 INFO L231 Difference]: Finished difference. Result has 374 places, 508 transitions, 8105 flow [2024-06-28 00:36:30,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7850, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8105, PETRI_PLACES=374, PETRI_TRANSITIONS=508} [2024-06-28 00:36:30,294 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-28 00:36:30,294 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 508 transitions, 8105 flow [2024-06-28 00:36:30,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:30,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:30,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:30,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 00:36:30,294 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:30,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:30,295 INFO L85 PathProgramCache]: Analyzing trace with hash -231191962, now seen corresponding path program 11 times [2024-06-28 00:36:30,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:30,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291192859] [2024-06-28 00:36:30,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:30,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:31,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:31,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291192859] [2024-06-28 00:36:31,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291192859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:31,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:31,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:36:31,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432119661] [2024-06-28 00:36:31,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:31,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:36:31,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:31,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:36:31,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:36:31,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:36:31,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 508 transitions, 8105 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:31,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:31,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:36:31,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:33,824 INFO L124 PetriNetUnfolderBase]: 3806/6110 cut-off events. [2024-06-28 00:36:33,824 INFO L125 PetriNetUnfolderBase]: For 925789/925789 co-relation queries the response was YES. [2024-06-28 00:36:33,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61795 conditions, 6110 events. 3806/6110 cut-off events. For 925789/925789 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 38980 event pairs, 733 based on Foata normal form. 4/6111 useless extension candidates. Maximal degree in co-relation 61612. Up to 5689 conditions per place. [2024-06-28 00:36:33,922 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 486 selfloop transitions, 64 changer transitions 0/555 dead transitions. [2024-06-28 00:36:33,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 555 transitions, 9924 flow [2024-06-28 00:36:33,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:36:33,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:36:33,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-28 00:36:33,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-28 00:36:33,925 INFO L175 Difference]: Start difference. First operand has 374 places, 508 transitions, 8105 flow. Second operand 10 states and 191 transitions. [2024-06-28 00:36:33,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 555 transitions, 9924 flow [2024-06-28 00:36:38,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 555 transitions, 9659 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-28 00:36:38,389 INFO L231 Difference]: Finished difference. Result has 375 places, 519 transitions, 8240 flow [2024-06-28 00:36:38,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7840, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8240, PETRI_PLACES=375, PETRI_TRANSITIONS=519} [2024-06-28 00:36:38,389 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 333 predicate places. [2024-06-28 00:36:38,389 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 519 transitions, 8240 flow [2024-06-28 00:36:38,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:38,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:38,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:38,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 00:36:38,390 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:38,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:38,390 INFO L85 PathProgramCache]: Analyzing trace with hash 781530082, now seen corresponding path program 12 times [2024-06-28 00:36:38,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:38,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601631645] [2024-06-28 00:36:38,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:38,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:39,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:39,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601631645] [2024-06-28 00:36:39,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601631645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:39,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:39,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:36:39,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842492625] [2024-06-28 00:36:39,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:39,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:36:39,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:39,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:36:39,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:36:39,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:36:39,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 519 transitions, 8240 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:39,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:39,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:36:39,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:41,792 INFO L124 PetriNetUnfolderBase]: 3798/6100 cut-off events. [2024-06-28 00:36:41,792 INFO L125 PetriNetUnfolderBase]: For 926388/926388 co-relation queries the response was YES. [2024-06-28 00:36:41,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61458 conditions, 6100 events. 3798/6100 cut-off events. For 926388/926388 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 38911 event pairs, 748 based on Foata normal form. 4/6101 useless extension candidates. Maximal degree in co-relation 61273. Up to 5763 conditions per place. [2024-06-28 00:36:41,895 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 489 selfloop transitions, 59 changer transitions 0/553 dead transitions. [2024-06-28 00:36:41,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 553 transitions, 9509 flow [2024-06-28 00:36:41,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:36:41,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:36:41,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-28 00:36:41,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-28 00:36:41,897 INFO L175 Difference]: Start difference. First operand has 375 places, 519 transitions, 8240 flow. Second operand 10 states and 187 transitions. [2024-06-28 00:36:41,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 553 transitions, 9509 flow [2024-06-28 00:36:45,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 553 transitions, 9234 flow, removed 111 selfloop flow, removed 5 redundant places. [2024-06-28 00:36:45,869 INFO L231 Difference]: Finished difference. Result has 380 places, 520 transitions, 8161 flow [2024-06-28 00:36:45,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8023, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8161, PETRI_PLACES=380, PETRI_TRANSITIONS=520} [2024-06-28 00:36:45,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-28 00:36:45,870 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 520 transitions, 8161 flow [2024-06-28 00:36:45,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:45,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:45,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:45,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 00:36:45,871 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:45,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:45,871 INFO L85 PathProgramCache]: Analyzing trace with hash 692816452, now seen corresponding path program 13 times [2024-06-28 00:36:45,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:45,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703480088] [2024-06-28 00:36:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:45,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:47,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:47,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703480088] [2024-06-28 00:36:47,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703480088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:47,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:47,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:36:47,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114440772] [2024-06-28 00:36:47,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:47,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:36:47,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:47,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:36:47,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:36:47,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:36:47,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 520 transitions, 8161 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:47,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:47,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:36:47,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:49,217 INFO L124 PetriNetUnfolderBase]: 3826/6141 cut-off events. [2024-06-28 00:36:49,217 INFO L125 PetriNetUnfolderBase]: For 936970/936970 co-relation queries the response was YES. [2024-06-28 00:36:49,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61502 conditions, 6141 events. 3826/6141 cut-off events. For 936970/936970 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 39201 event pairs, 692 based on Foata normal form. 4/6142 useless extension candidates. Maximal degree in co-relation 61315. Up to 5717 conditions per place. [2024-06-28 00:36:49,318 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 512 selfloop transitions, 53 changer transitions 0/570 dead transitions. [2024-06-28 00:36:49,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 570 transitions, 9724 flow [2024-06-28 00:36:49,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:36:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:36:49,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-28 00:36:49,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-28 00:36:49,319 INFO L175 Difference]: Start difference. First operand has 380 places, 520 transitions, 8161 flow. Second operand 10 states and 188 transitions. [2024-06-28 00:36:49,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 570 transitions, 9724 flow [2024-06-28 00:36:53,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 570 transitions, 9613 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 00:36:53,968 INFO L231 Difference]: Finished difference. Result has 384 places, 534 transitions, 8525 flow [2024-06-28 00:36:53,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8050, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8525, PETRI_PLACES=384, PETRI_TRANSITIONS=534} [2024-06-28 00:36:53,969 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-28 00:36:53,970 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 534 transitions, 8525 flow [2024-06-28 00:36:53,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:53,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:53,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:53,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 00:36:53,970 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:53,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:53,971 INFO L85 PathProgramCache]: Analyzing trace with hash -242474698, now seen corresponding path program 14 times [2024-06-28 00:36:53,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:53,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205355835] [2024-06-28 00:36:53,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:53,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:55,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:55,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205355835] [2024-06-28 00:36:55,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205355835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:55,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:55,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:36:55,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732359945] [2024-06-28 00:36:55,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:55,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:36:55,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:55,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:36:55,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:36:55,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:36:55,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 534 transitions, 8525 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:55,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:55,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:36:55,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:58,010 INFO L124 PetriNetUnfolderBase]: 3854/6181 cut-off events. [2024-06-28 00:36:58,011 INFO L125 PetriNetUnfolderBase]: For 959936/959936 co-relation queries the response was YES. [2024-06-28 00:36:58,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62421 conditions, 6181 events. 3854/6181 cut-off events. For 959936/959936 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 39443 event pairs, 736 based on Foata normal form. 4/6182 useless extension candidates. Maximal degree in co-relation 62231. Up to 5756 conditions per place. [2024-06-28 00:36:58,114 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 474 selfloop transitions, 92 changer transitions 0/571 dead transitions. [2024-06-28 00:36:58,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 571 transitions, 9879 flow [2024-06-28 00:36:58,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:36:58,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:36:58,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-28 00:36:58,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-28 00:36:58,116 INFO L175 Difference]: Start difference. First operand has 384 places, 534 transitions, 8525 flow. Second operand 10 states and 189 transitions. [2024-06-28 00:36:58,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 571 transitions, 9879 flow [2024-06-28 00:37:02,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 571 transitions, 9627 flow, removed 103 selfloop flow, removed 5 redundant places. [2024-06-28 00:37:02,835 INFO L231 Difference]: Finished difference. Result has 389 places, 538 transitions, 8587 flow [2024-06-28 00:37:02,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8273, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8587, PETRI_PLACES=389, PETRI_TRANSITIONS=538} [2024-06-28 00:37:02,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-28 00:37:02,836 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 538 transitions, 8587 flow [2024-06-28 00:37:02,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:02,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:02,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:02,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 00:37:02,836 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:02,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:02,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1888012576, now seen corresponding path program 15 times [2024-06-28 00:37:02,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:02,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225676464] [2024-06-28 00:37:02,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:02,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:04,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:04,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225676464] [2024-06-28 00:37:04,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225676464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:04,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:04,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:37:04,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744688571] [2024-06-28 00:37:04,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:04,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:37:04,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:04,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:37:04,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:37:04,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:37:04,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 538 transitions, 8587 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:04,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:04,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:37:04,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:06,534 INFO L124 PetriNetUnfolderBase]: 3918/6281 cut-off events. [2024-06-28 00:37:06,534 INFO L125 PetriNetUnfolderBase]: For 989996/989996 co-relation queries the response was YES. [2024-06-28 00:37:06,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63441 conditions, 6281 events. 3918/6281 cut-off events. For 989996/989996 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 40174 event pairs, 734 based on Foata normal form. 4/6281 useless extension candidates. Maximal degree in co-relation 63249. Up to 5758 conditions per place. [2024-06-28 00:37:06,640 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 478 selfloop transitions, 101 changer transitions 0/584 dead transitions. [2024-06-28 00:37:06,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 584 transitions, 10496 flow [2024-06-28 00:37:06,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:37:06,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:37:06,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-28 00:37:06,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682926829268293 [2024-06-28 00:37:06,642 INFO L175 Difference]: Start difference. First operand has 389 places, 538 transitions, 8587 flow. Second operand 10 states and 192 transitions. [2024-06-28 00:37:06,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 584 transitions, 10496 flow [2024-06-28 00:37:10,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 584 transitions, 10232 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-28 00:37:10,725 INFO L231 Difference]: Finished difference. Result has 392 places, 548 transitions, 8811 flow [2024-06-28 00:37:10,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8323, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8811, PETRI_PLACES=392, PETRI_TRANSITIONS=548} [2024-06-28 00:37:10,726 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-28 00:37:10,726 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 548 transitions, 8811 flow [2024-06-28 00:37:10,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:10,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:10,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:10,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 00:37:10,726 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:10,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:10,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1276005840, now seen corresponding path program 16 times [2024-06-28 00:37:10,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:10,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845226044] [2024-06-28 00:37:10,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:10,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:12,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:12,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845226044] [2024-06-28 00:37:12,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845226044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:12,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:12,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:37:12,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631610076] [2024-06-28 00:37:12,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:12,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:37:12,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:12,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:37:12,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:37:12,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:37:12,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 548 transitions, 8811 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:12,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:12,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:37:12,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:14,612 INFO L124 PetriNetUnfolderBase]: 3910/6269 cut-off events. [2024-06-28 00:37:14,612 INFO L125 PetriNetUnfolderBase]: For 987570/987570 co-relation queries the response was YES. [2024-06-28 00:37:14,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63142 conditions, 6269 events. 3910/6269 cut-off events. For 987570/987570 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 40107 event pairs, 744 based on Foata normal form. 4/6269 useless extension candidates. Maximal degree in co-relation 62948. Up to 5844 conditions per place. [2024-06-28 00:37:14,718 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 480 selfloop transitions, 97 changer transitions 0/582 dead transitions. [2024-06-28 00:37:14,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 582 transitions, 10146 flow [2024-06-28 00:37:14,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:37:14,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:37:14,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-28 00:37:14,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-28 00:37:14,720 INFO L175 Difference]: Start difference. First operand has 392 places, 548 transitions, 8811 flow. Second operand 10 states and 188 transitions. [2024-06-28 00:37:14,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 582 transitions, 10146 flow [2024-06-28 00:37:20,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 582 transitions, 9802 flow, removed 120 selfloop flow, removed 6 redundant places. [2024-06-28 00:37:20,072 INFO L231 Difference]: Finished difference. Result has 396 places, 549 transitions, 8744 flow [2024-06-28 00:37:20,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8527, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8744, PETRI_PLACES=396, PETRI_TRANSITIONS=549} [2024-06-28 00:37:20,073 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 354 predicate places. [2024-06-28 00:37:20,073 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 549 transitions, 8744 flow [2024-06-28 00:37:20,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:20,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:20,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:20,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 00:37:20,073 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:20,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:20,074 INFO L85 PathProgramCache]: Analyzing trace with hash -43166956, now seen corresponding path program 16 times [2024-06-28 00:37:20,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:20,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662264303] [2024-06-28 00:37:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:20,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:21,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:21,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:21,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662264303] [2024-06-28 00:37:21,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662264303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:21,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:21,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:37:21,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111058918] [2024-06-28 00:37:21,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:21,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:37:21,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:21,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:37:21,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:37:22,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:37:22,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 549 transitions, 8744 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:22,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:22,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:37:22,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:24,237 INFO L124 PetriNetUnfolderBase]: 4006/6429 cut-off events. [2024-06-28 00:37:24,238 INFO L125 PetriNetUnfolderBase]: For 1062983/1062983 co-relation queries the response was YES. [2024-06-28 00:37:24,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64468 conditions, 6429 events. 4006/6429 cut-off events. For 1062983/1062983 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 41329 event pairs, 760 based on Foata normal form. 16/6441 useless extension candidates. Maximal degree in co-relation 64272. Up to 5874 conditions per place. [2024-06-28 00:37:24,351 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 485 selfloop transitions, 101 changer transitions 0/591 dead transitions. [2024-06-28 00:37:24,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 591 transitions, 10192 flow [2024-06-28 00:37:24,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:37:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:37:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-28 00:37:24,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458980044345898 [2024-06-28 00:37:24,352 INFO L175 Difference]: Start difference. First operand has 396 places, 549 transitions, 8744 flow. Second operand 11 states and 207 transitions. [2024-06-28 00:37:24,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 591 transitions, 10192 flow [2024-06-28 00:37:28,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 591 transitions, 10028 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 00:37:28,927 INFO L231 Difference]: Finished difference. Result has 400 places, 551 transitions, 8890 flow [2024-06-28 00:37:28,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8580, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8890, PETRI_PLACES=400, PETRI_TRANSITIONS=551} [2024-06-28 00:37:28,927 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-28 00:37:28,927 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 551 transitions, 8890 flow [2024-06-28 00:37:28,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:28,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:28,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:28,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 00:37:28,928 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:28,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:28,928 INFO L85 PathProgramCache]: Analyzing trace with hash 900440866, now seen corresponding path program 17 times [2024-06-28 00:37:28,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:28,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585596910] [2024-06-28 00:37:28,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:28,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:31,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:31,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585596910] [2024-06-28 00:37:31,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585596910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:31,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:31,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:37:31,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929108426] [2024-06-28 00:37:31,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:31,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:37:31,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:31,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:37:31,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:37:31,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:37:31,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 551 transitions, 8890 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:31,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:31,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:37:31,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:33,653 INFO L124 PetriNetUnfolderBase]: 4102/6589 cut-off events. [2024-06-28 00:37:33,653 INFO L125 PetriNetUnfolderBase]: For 1092549/1092549 co-relation queries the response was YES. [2024-06-28 00:37:33,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66276 conditions, 6589 events. 4102/6589 cut-off events. For 1092549/1092549 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 42692 event pairs, 776 based on Foata normal form. 16/6601 useless extension candidates. Maximal degree in co-relation 66079. Up to 6034 conditions per place. [2024-06-28 00:37:33,766 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 492 selfloop transitions, 96 changer transitions 0/593 dead transitions. [2024-06-28 00:37:33,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 593 transitions, 10344 flow [2024-06-28 00:37:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:37:33,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:37:33,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-28 00:37:33,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611973392461197 [2024-06-28 00:37:33,768 INFO L175 Difference]: Start difference. First operand has 400 places, 551 transitions, 8890 flow. Second operand 11 states and 208 transitions. [2024-06-28 00:37:33,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 593 transitions, 10344 flow [2024-06-28 00:37:38,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 593 transitions, 10116 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-28 00:37:38,086 INFO L231 Difference]: Finished difference. Result has 402 places, 553 transitions, 8964 flow [2024-06-28 00:37:38,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8662, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8964, PETRI_PLACES=402, PETRI_TRANSITIONS=553} [2024-06-28 00:37:38,086 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 360 predicate places. [2024-06-28 00:37:38,086 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 553 transitions, 8964 flow [2024-06-28 00:37:38,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:38,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:38,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:38,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 00:37:38,087 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:38,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:38,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1107094306, now seen corresponding path program 18 times [2024-06-28 00:37:38,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:38,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509358249] [2024-06-28 00:37:38,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:38,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:40,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:40,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509358249] [2024-06-28 00:37:40,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509358249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:40,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:40,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:37:40,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837155567] [2024-06-28 00:37:40,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:40,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:37:40,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:40,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:37:40,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:37:40,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:37:40,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 553 transitions, 8964 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:40,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:40,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:37:40,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:42,608 INFO L124 PetriNetUnfolderBase]: 4173/6720 cut-off events. [2024-06-28 00:37:42,608 INFO L125 PetriNetUnfolderBase]: For 1094025/1094025 co-relation queries the response was YES. [2024-06-28 00:37:42,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66962 conditions, 6720 events. 4173/6720 cut-off events. For 1094025/1094025 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 43755 event pairs, 795 based on Foata normal form. 16/6732 useless extension candidates. Maximal degree in co-relation 66764. Up to 6088 conditions per place. [2024-06-28 00:37:42,718 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 467 selfloop transitions, 123 changer transitions 0/595 dead transitions. [2024-06-28 00:37:42,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 595 transitions, 10424 flow [2024-06-28 00:37:42,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:37:42,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:37:42,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-28 00:37:42,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611973392461197 [2024-06-28 00:37:42,719 INFO L175 Difference]: Start difference. First operand has 402 places, 553 transitions, 8964 flow. Second operand 11 states and 208 transitions. [2024-06-28 00:37:42,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 595 transitions, 10424 flow [2024-06-28 00:37:47,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 595 transitions, 10206 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-28 00:37:47,930 INFO L231 Difference]: Finished difference. Result has 404 places, 555 transitions, 9104 flow [2024-06-28 00:37:47,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8746, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9104, PETRI_PLACES=404, PETRI_TRANSITIONS=555} [2024-06-28 00:37:47,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-28 00:37:47,931 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 555 transitions, 9104 flow [2024-06-28 00:37:47,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:47,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:47,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:47,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 00:37:47,932 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:47,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:47,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1107361216, now seen corresponding path program 19 times [2024-06-28 00:37:47,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:47,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218335246] [2024-06-28 00:37:47,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:47,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:49,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:49,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218335246] [2024-06-28 00:37:49,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218335246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:49,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:49,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:37:49,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618632021] [2024-06-28 00:37:49,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:49,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:37:49,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:49,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:37:49,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:37:49,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:37:49,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 555 transitions, 9104 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:49,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:49,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:37:49,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:52,047 INFO L124 PetriNetUnfolderBase]: 4180/6739 cut-off events. [2024-06-28 00:37:52,047 INFO L125 PetriNetUnfolderBase]: For 1025619/1025619 co-relation queries the response was YES. [2024-06-28 00:37:52,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65810 conditions, 6739 events. 4180/6739 cut-off events. For 1025619/1025619 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 43967 event pairs, 766 based on Foata normal form. 12/6747 useless extension candidates. Maximal degree in co-relation 65611. Up to 5891 conditions per place. [2024-06-28 00:37:52,168 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 491 selfloop transitions, 103 changer transitions 0/599 dead transitions. [2024-06-28 00:37:52,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 599 transitions, 10531 flow [2024-06-28 00:37:52,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:37:52,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:37:52,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-28 00:37:52,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656319290465632 [2024-06-28 00:37:52,170 INFO L175 Difference]: Start difference. First operand has 404 places, 555 transitions, 9104 flow. Second operand 11 states and 210 transitions. [2024-06-28 00:37:52,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 599 transitions, 10531 flow [2024-06-28 00:37:56,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 599 transitions, 10247 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-28 00:37:56,783 INFO L231 Difference]: Finished difference. Result has 406 places, 556 transitions, 9059 flow [2024-06-28 00:37:56,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8820, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9059, PETRI_PLACES=406, PETRI_TRANSITIONS=556} [2024-06-28 00:37:56,784 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-28 00:37:56,784 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 556 transitions, 9059 flow [2024-06-28 00:37:56,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:56,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:56,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:56,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 00:37:56,785 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:56,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:56,785 INFO L85 PathProgramCache]: Analyzing trace with hash -212433630, now seen corresponding path program 17 times [2024-06-28 00:37:56,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:56,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561486968] [2024-06-28 00:37:56,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:56,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:58,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:58,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561486968] [2024-06-28 00:37:58,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561486968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:58,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:58,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:37:58,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051454207] [2024-06-28 00:37:58,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:58,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:37:58,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:58,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:37:58,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:37:58,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:37:58,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 556 transitions, 9059 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:58,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:58,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:37:58,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:00,294 INFO L124 PetriNetUnfolderBase]: 4219/6806 cut-off events. [2024-06-28 00:38:00,294 INFO L125 PetriNetUnfolderBase]: For 989814/989814 co-relation queries the response was YES. [2024-06-28 00:38:00,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66173 conditions, 6806 events. 4219/6806 cut-off events. For 989814/989814 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 44706 event pairs, 822 based on Foata normal form. 4/6807 useless extension candidates. Maximal degree in co-relation 65973. Up to 6383 conditions per place. [2024-06-28 00:38:00,407 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 547 selfloop transitions, 56 changer transitions 0/608 dead transitions. [2024-06-28 00:38:00,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 608 transitions, 10716 flow [2024-06-28 00:38:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:38:00,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:38:00,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-28 00:38:00,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-28 00:38:00,408 INFO L175 Difference]: Start difference. First operand has 406 places, 556 transitions, 9059 flow. Second operand 10 states and 188 transitions. [2024-06-28 00:38:00,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 608 transitions, 10716 flow [2024-06-28 00:38:05,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 608 transitions, 10043 flow, removed 19 selfloop flow, removed 13 redundant places. [2024-06-28 00:38:05,452 INFO L231 Difference]: Finished difference. Result has 405 places, 570 transitions, 8880 flow [2024-06-28 00:38:05,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8386, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8880, PETRI_PLACES=405, PETRI_TRANSITIONS=570} [2024-06-28 00:38:05,453 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 363 predicate places. [2024-06-28 00:38:05,453 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 570 transitions, 8880 flow [2024-06-28 00:38:05,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:05,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:05,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:05,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 00:38:05,453 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:05,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:05,454 INFO L85 PathProgramCache]: Analyzing trace with hash 179704768, now seen corresponding path program 18 times [2024-06-28 00:38:05,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:05,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759582106] [2024-06-28 00:38:05,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:05,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:06,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:06,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759582106] [2024-06-28 00:38:06,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759582106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:06,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:06,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:38:06,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658681511] [2024-06-28 00:38:06,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:06,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:38:06,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:06,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:38:06,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:38:07,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:38:07,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 570 transitions, 8880 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:07,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:07,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:38:07,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:09,209 INFO L124 PetriNetUnfolderBase]: 4305/6934 cut-off events. [2024-06-28 00:38:09,209 INFO L125 PetriNetUnfolderBase]: For 1029436/1029436 co-relation queries the response was YES. [2024-06-28 00:38:09,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66420 conditions, 6934 events. 4305/6934 cut-off events. For 1029436/1029436 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 45514 event pairs, 866 based on Foata normal form. 4/6935 useless extension candidates. Maximal degree in co-relation 66220. Up to 6488 conditions per place. [2024-06-28 00:38:09,333 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 548 selfloop transitions, 70 changer transitions 0/623 dead transitions. [2024-06-28 00:38:09,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 623 transitions, 10970 flow [2024-06-28 00:38:09,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:38:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:38:09,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-28 00:38:09,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-28 00:38:09,335 INFO L175 Difference]: Start difference. First operand has 405 places, 570 transitions, 8880 flow. Second operand 10 states and 191 transitions. [2024-06-28 00:38:09,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 623 transitions, 10970 flow [2024-06-28 00:38:15,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 623 transitions, 10712 flow, removed 111 selfloop flow, removed 4 redundant places. [2024-06-28 00:38:15,929 INFO L231 Difference]: Finished difference. Result has 412 places, 585 transitions, 9130 flow [2024-06-28 00:38:15,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8622, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9130, PETRI_PLACES=412, PETRI_TRANSITIONS=585} [2024-06-28 00:38:15,930 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-28 00:38:15,930 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 585 transitions, 9130 flow [2024-06-28 00:38:15,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:15,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:15,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:15,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 00:38:15,931 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:15,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:15,931 INFO L85 PathProgramCache]: Analyzing trace with hash -123720000, now seen corresponding path program 19 times [2024-06-28 00:38:15,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:15,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396761411] [2024-06-28 00:38:15,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:15,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:17,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:17,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396761411] [2024-06-28 00:38:17,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396761411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:17,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:17,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:38:17,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567634463] [2024-06-28 00:38:17,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:17,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:38:17,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:17,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:38:17,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:38:17,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:38:17,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 585 transitions, 9130 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:17,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:17,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:38:17,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:19,504 INFO L124 PetriNetUnfolderBase]: 4297/6928 cut-off events. [2024-06-28 00:38:19,504 INFO L125 PetriNetUnfolderBase]: For 1019891/1019891 co-relation queries the response was YES. [2024-06-28 00:38:19,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65983 conditions, 6928 events. 4297/6928 cut-off events. For 1019891/1019891 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 45576 event pairs, 908 based on Foata normal form. 4/6929 useless extension candidates. Maximal degree in co-relation 65780. Up to 6569 conditions per place. [2024-06-28 00:38:19,631 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 554 selfloop transitions, 62 changer transitions 0/621 dead transitions. [2024-06-28 00:38:19,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 621 transitions, 10553 flow [2024-06-28 00:38:19,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:38:19,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:38:19,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-28 00:38:19,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-28 00:38:19,633 INFO L175 Difference]: Start difference. First operand has 412 places, 585 transitions, 9130 flow. Second operand 10 states and 187 transitions. [2024-06-28 00:38:19,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 621 transitions, 10553 flow [2024-06-28 00:38:23,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 621 transitions, 10225 flow, removed 131 selfloop flow, removed 6 redundant places. [2024-06-28 00:38:23,811 INFO L231 Difference]: Finished difference. Result has 416 places, 586 transitions, 9016 flow [2024-06-28 00:38:23,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8868, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9016, PETRI_PLACES=416, PETRI_TRANSITIONS=586} [2024-06-28 00:38:23,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-28 00:38:23,811 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 586 transitions, 9016 flow [2024-06-28 00:38:23,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:23,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:23,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:23,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 00:38:23,812 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:23,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:23,813 INFO L85 PathProgramCache]: Analyzing trace with hash -61788898, now seen corresponding path program 20 times [2024-06-28 00:38:23,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:23,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851958379] [2024-06-28 00:38:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:23,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:24,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:24,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851958379] [2024-06-28 00:38:24,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851958379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:24,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:24,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:24,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234654608] [2024-06-28 00:38:24,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:24,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:24,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:24,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:24,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:25,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-28 00:38:25,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 586 transitions, 9016 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:25,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:25,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-28 00:38:25,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:26,967 INFO L124 PetriNetUnfolderBase]: 3496/6026 cut-off events. [2024-06-28 00:38:26,967 INFO L125 PetriNetUnfolderBase]: For 998593/998650 co-relation queries the response was YES. [2024-06-28 00:38:27,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58181 conditions, 6026 events. 3496/6026 cut-off events. For 998593/998650 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 42780 event pairs, 478 based on Foata normal form. 49/5937 useless extension candidates. Maximal degree in co-relation 57976. Up to 4592 conditions per place. [2024-06-28 00:38:27,070 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 422 selfloop transitions, 105 changer transitions 0/632 dead transitions. [2024-06-28 00:38:27,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 632 transitions, 10541 flow [2024-06-28 00:38:27,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:38:27,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:38:27,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-28 00:38:27,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176151761517616 [2024-06-28 00:38:27,071 INFO L175 Difference]: Start difference. First operand has 416 places, 586 transitions, 9016 flow. Second operand 9 states and 191 transitions. [2024-06-28 00:38:27,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 632 transitions, 10541 flow [2024-06-28 00:38:32,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 632 transitions, 10426 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 00:38:32,037 INFO L231 Difference]: Finished difference. Result has 419 places, 600 transitions, 9602 flow [2024-06-28 00:38:32,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8901, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9602, PETRI_PLACES=419, PETRI_TRANSITIONS=600} [2024-06-28 00:38:32,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-28 00:38:32,038 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 600 transitions, 9602 flow [2024-06-28 00:38:32,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:32,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:32,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:32,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 00:38:32,038 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)] === [2024-06-28 00:38:32,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:32,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1957233747, now seen corresponding path program 1 times [2024-06-28 00:38:32,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:32,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075797665] [2024-06-28 00:38:32,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:32,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:33,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:33,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075797665] [2024-06-28 00:38:33,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075797665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:33,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:33,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:38:33,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308711929] [2024-06-28 00:38:33,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:33,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:38:33,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:33,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:38:33,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:38:33,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:38:33,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 600 transitions, 9602 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:33,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:33,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:38:33,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:36,046 INFO L124 PetriNetUnfolderBase]: 4232/6869 cut-off events. [2024-06-28 00:38:36,046 INFO L125 PetriNetUnfolderBase]: For 1038213/1038222 co-relation queries the response was YES. [2024-06-28 00:38:36,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65724 conditions, 6869 events. 4232/6869 cut-off events. For 1038213/1038222 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 45766 event pairs, 1390 based on Foata normal form. 12/6869 useless extension candidates. Maximal degree in co-relation 65516. Up to 6365 conditions per place. [2024-06-28 00:38:36,176 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 519 selfloop transitions, 48 changer transitions 0/629 dead transitions. [2024-06-28 00:38:36,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 629 transitions, 11360 flow [2024-06-28 00:38:36,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:38:36,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:38:36,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 00:38:36,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-28 00:38:36,177 INFO L175 Difference]: Start difference. First operand has 419 places, 600 transitions, 9602 flow. Second operand 9 states and 169 transitions. [2024-06-28 00:38:36,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 629 transitions, 11360 flow [2024-06-28 00:38:43,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 629 transitions, 11153 flow, removed 94 selfloop flow, removed 3 redundant places. [2024-06-28 00:38:43,909 INFO L231 Difference]: Finished difference. Result has 425 places, 606 transitions, 9603 flow [2024-06-28 00:38:43,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9399, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9603, PETRI_PLACES=425, PETRI_TRANSITIONS=606} [2024-06-28 00:38:43,909 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-28 00:38:43,909 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 606 transitions, 9603 flow [2024-06-28 00:38:43,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:43,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:43,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:43,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 00:38:43,910 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)] === [2024-06-28 00:38:43,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:43,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1957323957, now seen corresponding path program 2 times [2024-06-28 00:38:43,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:43,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664968266] [2024-06-28 00:38:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:43,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:45,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:45,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664968266] [2024-06-28 00:38:45,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664968266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:45,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:45,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:38:45,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481252696] [2024-06-28 00:38:45,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:45,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:38:45,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:45,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:38:45,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:38:45,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:38:45,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 606 transitions, 9603 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:45,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:45,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:38:45,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:47,853 INFO L124 PetriNetUnfolderBase]: 4241/6882 cut-off events. [2024-06-28 00:38:47,853 INFO L125 PetriNetUnfolderBase]: For 1024298/1024326 co-relation queries the response was YES. [2024-06-28 00:38:47,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65794 conditions, 6882 events. 4241/6882 cut-off events. For 1024298/1024326 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 45844 event pairs, 1389 based on Foata normal form. 2/6870 useless extension candidates. Maximal degree in co-relation 65584. Up to 6409 conditions per place. [2024-06-28 00:38:47,973 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 522 selfloop transitions, 43 changer transitions 0/627 dead transitions. [2024-06-28 00:38:47,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 627 transitions, 11071 flow [2024-06-28 00:38:47,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:38:47,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:38:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 00:38:47,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-28 00:38:47,974 INFO L175 Difference]: Start difference. First operand has 425 places, 606 transitions, 9603 flow. Second operand 9 states and 163 transitions. [2024-06-28 00:38:47,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 627 transitions, 11071 flow [2024-06-28 00:38:52,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 627 transitions, 10960 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-28 00:38:52,645 INFO L231 Difference]: Finished difference. Result has 429 places, 609 transitions, 9646 flow [2024-06-28 00:38:52,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9502, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9646, PETRI_PLACES=429, PETRI_TRANSITIONS=609} [2024-06-28 00:38:52,646 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-28 00:38:52,646 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 609 transitions, 9646 flow [2024-06-28 00:38:52,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:52,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:52,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:52,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 00:38:52,646 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)] === [2024-06-28 00:38:52,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:52,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1961048979, now seen corresponding path program 1 times [2024-06-28 00:38:52,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:52,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865115853] [2024-06-28 00:38:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:52,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:54,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:54,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865115853] [2024-06-28 00:38:54,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865115853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:54,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:54,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:38:54,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804405313] [2024-06-28 00:38:54,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:54,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:38:54,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:54,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:38:54,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:38:54,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:38:54,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 609 transitions, 9646 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:54,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:54,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:38:54,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:56,963 INFO L124 PetriNetUnfolderBase]: 4354/7002 cut-off events. [2024-06-28 00:38:56,963 INFO L125 PetriNetUnfolderBase]: For 1010618/1010618 co-relation queries the response was YES. [2024-06-28 00:38:57,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66718 conditions, 7002 events. 4354/7002 cut-off events. For 1010618/1010618 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 46091 event pairs, 1427 based on Foata normal form. 1/7000 useless extension candidates. Maximal degree in co-relation 66507. Up to 6756 conditions per place. [2024-06-28 00:38:57,078 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 589 selfloop transitions, 31 changer transitions 0/625 dead transitions. [2024-06-28 00:38:57,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 625 transitions, 10984 flow [2024-06-28 00:38:57,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:38:57,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:38:57,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 00:38:57,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-28 00:38:57,079 INFO L175 Difference]: Start difference. First operand has 429 places, 609 transitions, 9646 flow. Second operand 8 states and 141 transitions. [2024-06-28 00:38:57,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 625 transitions, 10984 flow [2024-06-28 00:39:01,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 625 transitions, 10864 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-28 00:39:01,219 INFO L231 Difference]: Finished difference. Result has 429 places, 612 transitions, 9658 flow [2024-06-28 00:39:01,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9526, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9658, PETRI_PLACES=429, PETRI_TRANSITIONS=612} [2024-06-28 00:39:01,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-28 00:39:01,220 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 612 transitions, 9658 flow [2024-06-28 00:39:01,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:01,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:01,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:01,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 00:39:01,221 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)] === [2024-06-28 00:39:01,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:01,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1961048762, now seen corresponding path program 1 times [2024-06-28 00:39:01,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:01,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39757564] [2024-06-28 00:39:01,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:01,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:02,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:02,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39757564] [2024-06-28 00:39:02,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39757564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:02,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:02,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:02,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260807229] [2024-06-28 00:39:02,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:02,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:02,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:02,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:02,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:02,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:39:02,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 612 transitions, 9658 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:02,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:02,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:39:02,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:05,513 INFO L124 PetriNetUnfolderBase]: 4359/7011 cut-off events. [2024-06-28 00:39:05,513 INFO L125 PetriNetUnfolderBase]: For 1022399/1022399 co-relation queries the response was YES. [2024-06-28 00:39:05,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66986 conditions, 7011 events. 4359/7011 cut-off events. For 1022399/1022399 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 46111 event pairs, 1427 based on Foata normal form. 1/7009 useless extension candidates. Maximal degree in co-relation 66774. Up to 6756 conditions per place. [2024-06-28 00:39:05,638 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 589 selfloop transitions, 37 changer transitions 0/631 dead transitions. [2024-06-28 00:39:05,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 631 transitions, 11227 flow [2024-06-28 00:39:05,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:39:05,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:39:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-28 00:39:05,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 00:39:05,640 INFO L175 Difference]: Start difference. First operand has 429 places, 612 transitions, 9658 flow. Second operand 10 states and 170 transitions. [2024-06-28 00:39:05,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 631 transitions, 11227 flow [2024-06-28 00:39:09,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 631 transitions, 11117 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-28 00:39:09,992 INFO L231 Difference]: Finished difference. Result has 433 places, 615 transitions, 9671 flow [2024-06-28 00:39:09,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9548, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9671, PETRI_PLACES=433, PETRI_TRANSITIONS=615} [2024-06-28 00:39:09,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-28 00:39:09,993 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 615 transitions, 9671 flow [2024-06-28 00:39:09,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:09,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:09,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:09,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 00:39:09,993 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)] === [2024-06-28 00:39:09,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:09,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1961043027, now seen corresponding path program 3 times [2024-06-28 00:39:09,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:09,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278218182] [2024-06-28 00:39:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:09,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:11,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:11,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278218182] [2024-06-28 00:39:11,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278218182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:11,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:11,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:39:11,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007646551] [2024-06-28 00:39:11,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:11,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:39:11,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:11,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:39:11,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:39:11,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:39:11,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 615 transitions, 9671 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:11,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:11,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:39:11,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:13,823 INFO L124 PetriNetUnfolderBase]: 4268/6923 cut-off events. [2024-06-28 00:39:13,823 INFO L125 PetriNetUnfolderBase]: For 1058497/1058511 co-relation queries the response was YES. [2024-06-28 00:39:13,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66583 conditions, 6923 events. 4268/6923 cut-off events. For 1058497/1058511 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 46123 event pairs, 1388 based on Foata normal form. 5/6916 useless extension candidates. Maximal degree in co-relation 66370. Up to 6456 conditions per place. [2024-06-28 00:39:13,951 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 531 selfloop transitions, 43 changer transitions 0/636 dead transitions. [2024-06-28 00:39:13,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 636 transitions, 11435 flow [2024-06-28 00:39:13,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:39:13,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:39:13,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 00:39:13,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-28 00:39:13,953 INFO L175 Difference]: Start difference. First operand has 433 places, 615 transitions, 9671 flow. Second operand 8 states and 150 transitions. [2024-06-28 00:39:13,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 636 transitions, 11435 flow [2024-06-28 00:39:19,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 636 transitions, 11317 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-28 00:39:19,088 INFO L231 Difference]: Finished difference. Result has 434 places, 621 transitions, 9789 flow [2024-06-28 00:39:19,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9553, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9789, PETRI_PLACES=434, PETRI_TRANSITIONS=621} [2024-06-28 00:39:19,088 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-28 00:39:19,088 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 621 transitions, 9789 flow [2024-06-28 00:39:19,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:19,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:19,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:19,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 00:39:19,089 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)] === [2024-06-28 00:39:19,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:19,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1542901560, now seen corresponding path program 2 times [2024-06-28 00:39:19,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:19,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634025529] [2024-06-28 00:39:19,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:19,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:20,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:20,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634025529] [2024-06-28 00:39:20,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634025529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:20,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:20,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:20,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566812534] [2024-06-28 00:39:20,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:20,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:20,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:20,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:20,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:20,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:39:20,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 621 transitions, 9789 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:20,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:20,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:39:20,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:23,155 INFO L124 PetriNetUnfolderBase]: 4374/7032 cut-off events. [2024-06-28 00:39:23,155 INFO L125 PetriNetUnfolderBase]: For 1053891/1053891 co-relation queries the response was YES. [2024-06-28 00:39:23,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67791 conditions, 7032 events. 4374/7032 cut-off events. For 1053891/1053891 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 46258 event pairs, 1425 based on Foata normal form. 1/7030 useless extension candidates. Maximal degree in co-relation 67576. Up to 6778 conditions per place. [2024-06-28 00:39:23,281 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 593 selfloop transitions, 36 changer transitions 0/634 dead transitions. [2024-06-28 00:39:23,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 634 transitions, 11087 flow [2024-06-28 00:39:23,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:39:23,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:39:23,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 00:39:23,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-28 00:39:23,282 INFO L175 Difference]: Start difference. First operand has 434 places, 621 transitions, 9789 flow. Second operand 8 states and 143 transitions. [2024-06-28 00:39:23,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 634 transitions, 11087 flow [2024-06-28 00:39:27,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 634 transitions, 10963 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-28 00:39:27,744 INFO L231 Difference]: Finished difference. Result has 437 places, 621 transitions, 9743 flow [2024-06-28 00:39:27,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9665, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9743, PETRI_PLACES=437, PETRI_TRANSITIONS=621} [2024-06-28 00:39:27,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-28 00:39:27,745 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 621 transitions, 9743 flow [2024-06-28 00:39:27,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:27,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:27,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:27,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 00:39:27,745 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)] === [2024-06-28 00:39:27,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:27,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2118964201, now seen corresponding path program 2 times [2024-06-28 00:39:27,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:27,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289431424] [2024-06-28 00:39:27,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:27,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:29,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:29,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289431424] [2024-06-28 00:39:29,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289431424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:29,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:29,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:29,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121464666] [2024-06-28 00:39:29,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:29,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:29,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:29,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:29,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:29,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:39:29,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 621 transitions, 9743 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:29,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:29,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:39:29,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:31,510 INFO L124 PetriNetUnfolderBase]: 4379/7039 cut-off events. [2024-06-28 00:39:31,510 INFO L125 PetriNetUnfolderBase]: For 1069575/1069575 co-relation queries the response was YES. [2024-06-28 00:39:31,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67914 conditions, 7039 events. 4379/7039 cut-off events. For 1069575/1069575 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 46238 event pairs, 1423 based on Foata normal form. 1/7037 useless extension candidates. Maximal degree in co-relation 67698. Up to 6809 conditions per place. [2024-06-28 00:39:31,638 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 607 selfloop transitions, 20 changer transitions 0/632 dead transitions. [2024-06-28 00:39:31,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 632 transitions, 11091 flow [2024-06-28 00:39:31,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:39:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:39:31,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-28 00:39:31,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44308943089430897 [2024-06-28 00:39:31,639 INFO L175 Difference]: Start difference. First operand has 437 places, 621 transitions, 9743 flow. Second operand 6 states and 109 transitions. [2024-06-28 00:39:31,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 632 transitions, 11091 flow [2024-06-28 00:39:36,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 632 transitions, 11019 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 00:39:36,941 INFO L231 Difference]: Finished difference. Result has 436 places, 624 transitions, 9799 flow [2024-06-28 00:39:36,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9671, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9799, PETRI_PLACES=436, PETRI_TRANSITIONS=624} [2024-06-28 00:39:36,942 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-28 00:39:36,942 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 624 transitions, 9799 flow [2024-06-28 00:39:36,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:36,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:36,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:36,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 00:39:36,942 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)] === [2024-06-28 00:39:36,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:36,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1137808493, now seen corresponding path program 3 times [2024-06-28 00:39:36,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:36,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064203750] [2024-06-28 00:39:36,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:36,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:38,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:38,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064203750] [2024-06-28 00:39:38,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064203750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:38,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:38,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:38,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896522930] [2024-06-28 00:39:38,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:38,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:38,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:38,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:38,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:38,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:39:38,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 624 transitions, 9799 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:38,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:38,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:39:38,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:40,887 INFO L124 PetriNetUnfolderBase]: 4376/7035 cut-off events. [2024-06-28 00:39:40,887 INFO L125 PetriNetUnfolderBase]: For 1076907/1076907 co-relation queries the response was YES. [2024-06-28 00:39:40,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68069 conditions, 7035 events. 4376/7035 cut-off events. For 1076907/1076907 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 46262 event pairs, 1423 based on Foata normal form. 1/7033 useless extension candidates. Maximal degree in co-relation 67852. Up to 6799 conditions per place. [2024-06-28 00:39:41,022 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 606 selfloop transitions, 24 changer transitions 0/635 dead transitions. [2024-06-28 00:39:41,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 635 transitions, 11159 flow [2024-06-28 00:39:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:39:41,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:39:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-28 00:39:41,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44308943089430897 [2024-06-28 00:39:41,023 INFO L175 Difference]: Start difference. First operand has 436 places, 624 transitions, 9799 flow. Second operand 6 states and 109 transitions. [2024-06-28 00:39:41,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 635 transitions, 11159 flow [2024-06-28 00:39:45,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 635 transitions, 11087 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-28 00:39:45,644 INFO L231 Difference]: Finished difference. Result has 438 places, 627 transitions, 9873 flow [2024-06-28 00:39:45,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9727, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9873, PETRI_PLACES=438, PETRI_TRANSITIONS=627} [2024-06-28 00:39:45,644 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-28 00:39:45,644 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 627 transitions, 9873 flow [2024-06-28 00:39:45,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:45,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:45,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:45,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 00:39:45,645 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)] === [2024-06-28 00:39:45,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:45,645 INFO L85 PathProgramCache]: Analyzing trace with hash 823970085, now seen corresponding path program 4 times [2024-06-28 00:39:45,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:45,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516019959] [2024-06-28 00:39:45,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:45,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:47,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:47,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516019959] [2024-06-28 00:39:47,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516019959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:47,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:47,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:47,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440637958] [2024-06-28 00:39:47,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:47,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:47,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:47,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:47,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:47,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:39:47,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 627 transitions, 9873 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:47,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:47,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:39:47,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:49,342 INFO L124 PetriNetUnfolderBase]: 4373/7029 cut-off events. [2024-06-28 00:39:49,342 INFO L125 PetriNetUnfolderBase]: For 1083872/1083872 co-relation queries the response was YES. [2024-06-28 00:39:49,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68231 conditions, 7029 events. 4373/7029 cut-off events. For 1083872/1083872 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 46180 event pairs, 1423 based on Foata normal form. 1/7027 useless extension candidates. Maximal degree in co-relation 68013. Up to 6798 conditions per place. [2024-06-28 00:39:49,470 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 607 selfloop transitions, 23 changer transitions 0/635 dead transitions. [2024-06-28 00:39:49,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 635 transitions, 11157 flow [2024-06-28 00:39:49,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:39:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:39:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-28 00:39:49,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-28 00:39:49,471 INFO L175 Difference]: Start difference. First operand has 438 places, 627 transitions, 9873 flow. Second operand 6 states and 110 transitions. [2024-06-28 00:39:49,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 635 transitions, 11157 flow [2024-06-28 00:39:54,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 635 transitions, 11021 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-28 00:39:54,897 INFO L231 Difference]: Finished difference. Result has 439 places, 627 transitions, 9797 flow [2024-06-28 00:39:54,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9737, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9797, PETRI_PLACES=439, PETRI_TRANSITIONS=627} [2024-06-28 00:39:54,898 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-28 00:39:54,898 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 627 transitions, 9797 flow [2024-06-28 00:39:54,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:54,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:54,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:54,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 00:39:54,898 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)] === [2024-06-28 00:39:54,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:54,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1137814445, now seen corresponding path program 4 times [2024-06-28 00:39:54,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:54,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353948693] [2024-06-28 00:39:54,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:54,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:56,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:56,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353948693] [2024-06-28 00:39:56,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353948693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:56,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:56,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:56,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883282922] [2024-06-28 00:39:56,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:56,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:56,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:56,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:56,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:56,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:39:56,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 627 transitions, 9797 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:56,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:56,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:39:56,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:58,866 INFO L124 PetriNetUnfolderBase]: 4279/6939 cut-off events. [2024-06-28 00:39:58,866 INFO L125 PetriNetUnfolderBase]: For 1090364/1090378 co-relation queries the response was YES. [2024-06-28 00:39:58,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67060 conditions, 6939 events. 4279/6939 cut-off events. For 1090364/1090378 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 46184 event pairs, 1386 based on Foata normal form. 7/6937 useless extension candidates. Maximal degree in co-relation 66842. Up to 6475 conditions per place. [2024-06-28 00:39:58,992 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 549 selfloop transitions, 37 changer transitions 0/648 dead transitions. [2024-06-28 00:39:58,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 648 transitions, 11441 flow [2024-06-28 00:39:58,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:39:58,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:39:58,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 00:39:58,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-28 00:39:58,993 INFO L175 Difference]: Start difference. First operand has 439 places, 627 transitions, 9797 flow. Second operand 9 states and 157 transitions. [2024-06-28 00:39:58,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 648 transitions, 11441 flow [2024-06-28 00:40:04,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 648 transitions, 11389 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 00:40:04,368 INFO L231 Difference]: Finished difference. Result has 444 places, 636 transitions, 10053 flow [2024-06-28 00:40:04,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9745, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10053, PETRI_PLACES=444, PETRI_TRANSITIONS=636} [2024-06-28 00:40:04,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-28 00:40:04,368 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 636 transitions, 10053 flow [2024-06-28 00:40:04,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:04,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:04,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:04,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 00:40:04,369 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:04,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:04,369 INFO L85 PathProgramCache]: Analyzing trace with hash 443259732, now seen corresponding path program 1 times [2024-06-28 00:40:04,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:04,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696942805] [2024-06-28 00:40:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:04,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:06,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:06,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696942805] [2024-06-28 00:40:06,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696942805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:06,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:06,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:40:06,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130360429] [2024-06-28 00:40:06,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:06,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:40:06,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:06,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:40:06,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:40:06,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:40:06,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 636 transitions, 10053 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:06,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:06,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:40:06,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:09,663 INFO L124 PetriNetUnfolderBase]: 4428/7113 cut-off events. [2024-06-28 00:40:09,663 INFO L125 PetriNetUnfolderBase]: For 1159430/1159430 co-relation queries the response was YES. [2024-06-28 00:40:09,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69346 conditions, 7113 events. 4428/7113 cut-off events. For 1159430/1159430 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 46607 event pairs, 781 based on Foata normal form. 12/7114 useless extension candidates. Maximal degree in co-relation 69126. Up to 6634 conditions per place. [2024-06-28 00:40:09,782 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 585 selfloop transitions, 81 changer transitions 0/671 dead transitions. [2024-06-28 00:40:09,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 671 transitions, 11597 flow [2024-06-28 00:40:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:40:09,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:40:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-28 00:40:09,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44567627494456763 [2024-06-28 00:40:09,784 INFO L175 Difference]: Start difference. First operand has 444 places, 636 transitions, 10053 flow. Second operand 11 states and 201 transitions. [2024-06-28 00:40:09,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 671 transitions, 11597 flow [2024-06-28 00:40:15,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 671 transitions, 11460 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-28 00:40:15,580 INFO L231 Difference]: Finished difference. Result has 450 places, 637 transitions, 10161 flow [2024-06-28 00:40:15,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9916, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10161, PETRI_PLACES=450, PETRI_TRANSITIONS=637} [2024-06-28 00:40:15,581 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-28 00:40:15,581 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 637 transitions, 10161 flow [2024-06-28 00:40:15,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:15,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:15,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:15,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 00:40:15,581 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:15,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:15,582 INFO L85 PathProgramCache]: Analyzing trace with hash 438675762, now seen corresponding path program 2 times [2024-06-28 00:40:15,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:15,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704483390] [2024-06-28 00:40:15,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:15,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:17,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:17,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704483390] [2024-06-28 00:40:17,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704483390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:17,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:17,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:40:17,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35305385] [2024-06-28 00:40:17,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:17,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:40:17,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:17,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:40:17,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:40:17,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:40:17,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 637 transitions, 10161 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:17,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:17,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:40:17,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:20,298 INFO L124 PetriNetUnfolderBase]: 4469/7184 cut-off events. [2024-06-28 00:40:20,299 INFO L125 PetriNetUnfolderBase]: For 1184856/1184856 co-relation queries the response was YES. [2024-06-28 00:40:20,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70329 conditions, 7184 events. 4469/7184 cut-off events. For 1184856/1184856 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 47120 event pairs, 812 based on Foata normal form. 12/7185 useless extension candidates. Maximal degree in co-relation 70107. Up to 6613 conditions per place. [2024-06-28 00:40:20,427 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 577 selfloop transitions, 91 changer transitions 0/673 dead transitions. [2024-06-28 00:40:20,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 673 transitions, 11713 flow [2024-06-28 00:40:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:40:20,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:40:20,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-28 00:40:20,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44789356984478934 [2024-06-28 00:40:20,429 INFO L175 Difference]: Start difference. First operand has 450 places, 637 transitions, 10161 flow. Second operand 11 states and 202 transitions. [2024-06-28 00:40:20,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 673 transitions, 11713 flow [2024-06-28 00:40:26,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 673 transitions, 11504 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-28 00:40:26,936 INFO L231 Difference]: Finished difference. Result has 452 places, 638 transitions, 10219 flow [2024-06-28 00:40:26,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9952, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10219, PETRI_PLACES=452, PETRI_TRANSITIONS=638} [2024-06-28 00:40:26,936 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-28 00:40:26,936 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 638 transitions, 10219 flow [2024-06-28 00:40:26,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:26,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:26,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:26,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 00:40:26,937 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:26,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:26,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1968319370, now seen corresponding path program 3 times [2024-06-28 00:40:26,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:26,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048109018] [2024-06-28 00:40:26,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:26,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:28,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:28,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048109018] [2024-06-28 00:40:28,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048109018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:28,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:28,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:40:28,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809288998] [2024-06-28 00:40:28,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:28,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:40:28,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:28,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:40:28,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:40:28,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:40:28,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 638 transitions, 10219 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:28,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:28,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:40:28,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:31,421 INFO L124 PetriNetUnfolderBase]: 4510/7255 cut-off events. [2024-06-28 00:40:31,421 INFO L125 PetriNetUnfolderBase]: For 1205031/1205031 co-relation queries the response was YES. [2024-06-28 00:40:31,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71044 conditions, 7255 events. 4510/7255 cut-off events. For 1205031/1205031 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 47743 event pairs, 851 based on Foata normal form. 12/7256 useless extension candidates. Maximal degree in co-relation 70821. Up to 6776 conditions per place. [2024-06-28 00:40:31,551 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 584 selfloop transitions, 84 changer transitions 0/673 dead transitions. [2024-06-28 00:40:31,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 673 transitions, 11771 flow [2024-06-28 00:40:31,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:40:31,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:40:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-28 00:40:31,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434589800443459 [2024-06-28 00:40:31,553 INFO L175 Difference]: Start difference. First operand has 452 places, 638 transitions, 10219 flow. Second operand 11 states and 200 transitions. [2024-06-28 00:40:31,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 673 transitions, 11771 flow [2024-06-28 00:40:39,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 673 transitions, 11540 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-28 00:40:39,174 INFO L231 Difference]: Finished difference. Result has 454 places, 639 transitions, 10243 flow [2024-06-28 00:40:39,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9988, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10243, PETRI_PLACES=454, PETRI_TRANSITIONS=639} [2024-06-28 00:40:39,175 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-28 00:40:39,175 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 639 transitions, 10243 flow [2024-06-28 00:40:39,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:39,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:39,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:39,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 00:40:39,176 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:39,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:39,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1107931306, now seen corresponding path program 4 times [2024-06-28 00:40:39,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:39,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612300344] [2024-06-28 00:40:39,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:39,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:41,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:41,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612300344] [2024-06-28 00:40:41,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612300344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:41,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:41,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:40:41,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987778686] [2024-06-28 00:40:41,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:41,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:40:41,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:41,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:40:41,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:40:41,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:40:41,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 639 transitions, 10243 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:41,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:41,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:40:41,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:43,791 INFO L124 PetriNetUnfolderBase]: 4551/7330 cut-off events. [2024-06-28 00:40:43,791 INFO L125 PetriNetUnfolderBase]: For 1226068/1226068 co-relation queries the response was YES. [2024-06-28 00:40:43,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71646 conditions, 7330 events. 4551/7330 cut-off events. For 1226068/1226068 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 48430 event pairs, 873 based on Foata normal form. 12/7331 useless extension candidates. Maximal degree in co-relation 71422. Up to 6814 conditions per place. [2024-06-28 00:40:43,911 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 601 selfloop transitions, 69 changer transitions 0/675 dead transitions. [2024-06-28 00:40:43,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 675 transitions, 11801 flow [2024-06-28 00:40:43,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:40:43,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:40:43,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-28 00:40:43,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434589800443459 [2024-06-28 00:40:43,913 INFO L175 Difference]: Start difference. First operand has 454 places, 639 transitions, 10243 flow. Second operand 11 states and 200 transitions. [2024-06-28 00:40:43,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 675 transitions, 11801 flow [2024-06-28 00:40:51,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 675 transitions, 11582 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-28 00:40:51,049 INFO L231 Difference]: Finished difference. Result has 456 places, 640 transitions, 10252 flow [2024-06-28 00:40:51,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10024, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10252, PETRI_PLACES=456, PETRI_TRANSITIONS=640} [2024-06-28 00:40:51,049 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-28 00:40:51,049 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 640 transitions, 10252 flow [2024-06-28 00:40:51,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:51,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:51,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:51,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 00:40:51,050 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:51,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:51,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1103347336, now seen corresponding path program 5 times [2024-06-28 00:40:51,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:51,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092772616] [2024-06-28 00:40:51,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:51,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:52,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:52,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092772616] [2024-06-28 00:40:52,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092772616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:52,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:52,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:40:52,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129775139] [2024-06-28 00:40:52,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:52,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:40:52,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:52,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:40:52,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:40:53,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:40:53,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 640 transitions, 10252 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:53,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:53,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:40:53,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:55,594 INFO L124 PetriNetUnfolderBase]: 4592/7403 cut-off events. [2024-06-28 00:40:55,594 INFO L125 PetriNetUnfolderBase]: For 1246800/1246800 co-relation queries the response was YES. [2024-06-28 00:40:55,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72283 conditions, 7403 events. 4592/7403 cut-off events. For 1246800/1246800 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 49004 event pairs, 917 based on Foata normal form. 12/7404 useless extension candidates. Maximal degree in co-relation 72058. Up to 6972 conditions per place. [2024-06-28 00:40:55,730 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 610 selfloop transitions, 60 changer transitions 0/675 dead transitions. [2024-06-28 00:40:55,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 675 transitions, 11810 flow [2024-06-28 00:40:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:40:55,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:40:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-28 00:40:55,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 00:40:55,732 INFO L175 Difference]: Start difference. First operand has 456 places, 640 transitions, 10252 flow. Second operand 11 states and 198 transitions. [2024-06-28 00:40:55,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 675 transitions, 11810 flow [2024-06-28 00:41:03,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 675 transitions, 11620 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-28 00:41:03,803 INFO L231 Difference]: Finished difference. Result has 458 places, 641 transitions, 10274 flow [2024-06-28 00:41:03,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10062, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10274, PETRI_PLACES=458, PETRI_TRANSITIONS=641} [2024-06-28 00:41:03,804 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-28 00:41:03,804 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 641 transitions, 10274 flow [2024-06-28 00:41:03,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:03,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:03,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:03,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 00:41:03,805 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:03,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:03,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1697945294, now seen corresponding path program 6 times [2024-06-28 00:41:03,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:03,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375410035] [2024-06-28 00:41:03,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:03,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:05,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:05,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375410035] [2024-06-28 00:41:05,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375410035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:05,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:05,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:41:05,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078152860] [2024-06-28 00:41:05,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:05,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:41:05,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:05,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:41:05,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:41:05,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:41:05,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 641 transitions, 10274 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:05,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:05,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:41:05,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:08,450 INFO L124 PetriNetUnfolderBase]: 4633/7470 cut-off events. [2024-06-28 00:41:08,451 INFO L125 PetriNetUnfolderBase]: For 1268136/1268136 co-relation queries the response was YES. [2024-06-28 00:41:08,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72879 conditions, 7470 events. 4633/7470 cut-off events. For 1268136/1268136 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 49587 event pairs, 877 based on Foata normal form. 12/7471 useless extension candidates. Maximal degree in co-relation 72653. Up to 6940 conditions per place. [2024-06-28 00:41:08,594 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 614 selfloop transitions, 60 changer transitions 0/679 dead transitions. [2024-06-28 00:41:08,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 679 transitions, 11856 flow [2024-06-28 00:41:08,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:41:08,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:41:08,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-28 00:41:08,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44124168514412415 [2024-06-28 00:41:08,595 INFO L175 Difference]: Start difference. First operand has 458 places, 641 transitions, 10274 flow. Second operand 11 states and 199 transitions. [2024-06-28 00:41:08,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 679 transitions, 11856 flow [2024-06-28 00:41:17,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 679 transitions, 11682 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-28 00:41:17,380 INFO L231 Difference]: Finished difference. Result has 460 places, 642 transitions, 10315 flow [2024-06-28 00:41:17,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10100, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10315, PETRI_PLACES=460, PETRI_TRANSITIONS=642} [2024-06-28 00:41:17,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 418 predicate places. [2024-06-28 00:41:17,380 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 642 transitions, 10315 flow [2024-06-28 00:41:17,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:17,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:17,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:17,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 00:41:17,381 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:17,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:17,381 INFO L85 PathProgramCache]: Analyzing trace with hash -894492646, now seen corresponding path program 1 times [2024-06-28 00:41:17,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:17,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709733181] [2024-06-28 00:41:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:17,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:19,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:19,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709733181] [2024-06-28 00:41:19,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709733181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:19,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:19,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:41:19,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392899341] [2024-06-28 00:41:19,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:19,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:41:19,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:19,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:41:19,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:41:19,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:41:19,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 642 transitions, 10315 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:19,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:19,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:41:19,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:22,400 INFO L124 PetriNetUnfolderBase]: 4669/7530 cut-off events. [2024-06-28 00:41:22,401 INFO L125 PetriNetUnfolderBase]: For 1234729/1234729 co-relation queries the response was YES. [2024-06-28 00:41:22,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73459 conditions, 7530 events. 4669/7530 cut-off events. For 1234729/1234729 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 50037 event pairs, 963 based on Foata normal form. 2/7521 useless extension candidates. Maximal degree in co-relation 73232. Up to 7115 conditions per place. [2024-06-28 00:41:22,549 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 583 selfloop transitions, 94 changer transitions 0/682 dead transitions. [2024-06-28 00:41:22,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 682 transitions, 12525 flow [2024-06-28 00:41:22,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:41:22,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:41:22,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 209 transitions. [2024-06-28 00:41:22,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247967479674797 [2024-06-28 00:41:22,551 INFO L175 Difference]: Start difference. First operand has 460 places, 642 transitions, 10315 flow. Second operand 12 states and 209 transitions. [2024-06-28 00:41:22,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 682 transitions, 12525 flow [2024-06-28 00:41:31,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 682 transitions, 12350 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-28 00:41:31,362 INFO L231 Difference]: Finished difference. Result has 463 places, 657 transitions, 10616 flow [2024-06-28 00:41:31,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10140, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10616, PETRI_PLACES=463, PETRI_TRANSITIONS=657} [2024-06-28 00:41:31,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-28 00:41:31,363 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 657 transitions, 10616 flow [2024-06-28 00:41:31,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:31,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:31,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:31,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 00:41:31,363 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:31,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:31,364 INFO L85 PathProgramCache]: Analyzing trace with hash -569365576, now seen corresponding path program 2 times [2024-06-28 00:41:31,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:31,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325801891] [2024-06-28 00:41:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:31,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:33,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:33,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325801891] [2024-06-28 00:41:33,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325801891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:33,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:33,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:41:33,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950209883] [2024-06-28 00:41:33,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:33,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:41:33,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:33,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:41:33,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:41:33,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:41:33,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 657 transitions, 10616 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:33,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:33,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:41:33,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:35,820 INFO L124 PetriNetUnfolderBase]: 4700/7573 cut-off events. [2024-06-28 00:41:35,820 INFO L125 PetriNetUnfolderBase]: For 1264901/1264901 co-relation queries the response was YES. [2024-06-28 00:41:35,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74370 conditions, 7573 events. 4700/7573 cut-off events. For 1264901/1264901 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 50216 event pairs, 919 based on Foata normal form. 2/7564 useless extension candidates. Maximal degree in co-relation 74142. Up to 7144 conditions per place. [2024-06-28 00:41:35,967 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 585 selfloop transitions, 98 changer transitions 0/688 dead transitions. [2024-06-28 00:41:35,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 688 transitions, 12994 flow [2024-06-28 00:41:35,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:41:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:41:35,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-28 00:41:35,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43237250554323725 [2024-06-28 00:41:35,969 INFO L175 Difference]: Start difference. First operand has 463 places, 657 transitions, 10616 flow. Second operand 11 states and 195 transitions. [2024-06-28 00:41:35,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 688 transitions, 12994 flow [2024-06-28 00:41:45,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 688 transitions, 12746 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-28 00:41:45,279 INFO L231 Difference]: Finished difference. Result has 468 places, 666 transitions, 10755 flow [2024-06-28 00:41:45,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10419, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10755, PETRI_PLACES=468, PETRI_TRANSITIONS=666} [2024-06-28 00:41:45,280 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-28 00:41:45,280 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 666 transitions, 10755 flow [2024-06-28 00:41:45,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:45,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:45,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:45,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 00:41:45,280 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:45,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:45,280 INFO L85 PathProgramCache]: Analyzing trace with hash -885238216, now seen corresponding path program 3 times [2024-06-28 00:41:45,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:45,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471557004] [2024-06-28 00:41:45,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:45,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:47,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:47,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471557004] [2024-06-28 00:41:47,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471557004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:47,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:47,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:41:47,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91384563] [2024-06-28 00:41:47,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:47,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:41:47,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:47,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:41:47,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:41:47,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:41:47,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 666 transitions, 10755 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:47,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:47,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:41:47,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:50,080 INFO L124 PetriNetUnfolderBase]: 4694/7565 cut-off events. [2024-06-28 00:41:50,080 INFO L125 PetriNetUnfolderBase]: For 1265078/1265078 co-relation queries the response was YES. [2024-06-28 00:41:50,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74145 conditions, 7565 events. 4694/7565 cut-off events. For 1265078/1265078 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 50204 event pairs, 918 based on Foata normal form. 2/7556 useless extension candidates. Maximal degree in co-relation 73915. Up to 7139 conditions per place. [2024-06-28 00:41:50,219 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 585 selfloop transitions, 100 changer transitions 0/690 dead transitions. [2024-06-28 00:41:50,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 690 transitions, 12713 flow [2024-06-28 00:41:50,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 00:41:50,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 00:41:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 223 transitions. [2024-06-28 00:41:50,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41838649155722324 [2024-06-28 00:41:50,220 INFO L175 Difference]: Start difference. First operand has 468 places, 666 transitions, 10755 flow. Second operand 13 states and 223 transitions. [2024-06-28 00:41:50,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 690 transitions, 12713 flow [2024-06-28 00:42:00,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 690 transitions, 12528 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-28 00:42:00,602 INFO L231 Difference]: Finished difference. Result has 476 places, 666 transitions, 10777 flow [2024-06-28 00:42:00,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10570, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10777, PETRI_PLACES=476, PETRI_TRANSITIONS=666} [2024-06-28 00:42:00,603 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-28 00:42:00,603 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 666 transitions, 10777 flow [2024-06-28 00:42:00,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:00,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:00,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:00,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 00:42:00,604 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:00,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:00,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1586020876, now seen corresponding path program 1 times [2024-06-28 00:42:00,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:00,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510251476] [2024-06-28 00:42:00,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:00,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:02,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:02,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510251476] [2024-06-28 00:42:02,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510251476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:02,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:02,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:42:02,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201264014] [2024-06-28 00:42:02,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:02,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:42:02,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:02,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:42:02,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:42:02,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:42:02,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 666 transitions, 10777 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) [2024-06-28 00:42:02,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:02,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:42:02,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:05,011 INFO L124 PetriNetUnfolderBase]: 4707/7589 cut-off events. [2024-06-28 00:42:05,011 INFO L125 PetriNetUnfolderBase]: For 1284375/1284375 co-relation queries the response was YES. [2024-06-28 00:42:05,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74655 conditions, 7589 events. 4707/7589 cut-off events. For 1284375/1284375 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 50511 event pairs, 1066 based on Foata normal form. 1/7584 useless extension candidates. Maximal degree in co-relation 74424. Up to 7277 conditions per place. [2024-06-28 00:42:05,241 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 637 selfloop transitions, 50 changer transitions 0/692 dead transitions. [2024-06-28 00:42:05,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 692 transitions, 12687 flow [2024-06-28 00:42:05,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:42:05,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:42:05,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 00:42:05,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-28 00:42:05,243 INFO L175 Difference]: Start difference. First operand has 476 places, 666 transitions, 10777 flow. Second operand 9 states and 161 transitions. [2024-06-28 00:42:05,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 692 transitions, 12687 flow [2024-06-28 00:42:14,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 692 transitions, 12457 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-28 00:42:14,054 INFO L231 Difference]: Finished difference. Result has 473 places, 672 transitions, 10876 flow [2024-06-28 00:42:14,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10547, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10876, PETRI_PLACES=473, PETRI_TRANSITIONS=672} [2024-06-28 00:42:14,055 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-28 00:42:14,055 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 672 transitions, 10876 flow [2024-06-28 00:42:14,055 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) [2024-06-28 00:42:14,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:14,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:14,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 00:42:14,055 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:14,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:14,056 INFO L85 PathProgramCache]: Analyzing trace with hash -746729286, now seen corresponding path program 1 times [2024-06-28 00:42:14,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:14,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221825871] [2024-06-28 00:42:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:14,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:15,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:15,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221825871] [2024-06-28 00:42:15,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221825871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:15,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:15,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:42:15,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695860399] [2024-06-28 00:42:15,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:15,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:42:15,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:15,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:42:15,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:42:15,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:42:15,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 672 transitions, 10876 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:15,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:15,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:42:15,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:18,247 INFO L124 PetriNetUnfolderBase]: 4748/7649 cut-off events. [2024-06-28 00:42:18,247 INFO L125 PetriNetUnfolderBase]: For 1330104/1330104 co-relation queries the response was YES. [2024-06-28 00:42:18,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75753 conditions, 7649 events. 4748/7649 cut-off events. For 1330104/1330104 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 50849 event pairs, 1059 based on Foata normal form. 2/7648 useless extension candidates. Maximal degree in co-relation 75521. Up to 7291 conditions per place. [2024-06-28 00:42:18,503 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 646 selfloop transitions, 70 changer transitions 0/721 dead transitions. [2024-06-28 00:42:18,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 721 transitions, 13039 flow [2024-06-28 00:42:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:42:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:42:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-28 00:42:18,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47696476964769646 [2024-06-28 00:42:18,505 INFO L175 Difference]: Start difference. First operand has 473 places, 672 transitions, 10876 flow. Second operand 9 states and 176 transitions. [2024-06-28 00:42:18,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 721 transitions, 13039 flow [2024-06-28 00:42:27,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 721 transitions, 12799 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-28 00:42:27,338 INFO L231 Difference]: Finished difference. Result has 478 places, 698 transitions, 11243 flow [2024-06-28 00:42:27,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10650, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11243, PETRI_PLACES=478, PETRI_TRANSITIONS=698} [2024-06-28 00:42:27,338 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-28 00:42:27,339 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 698 transitions, 11243 flow [2024-06-28 00:42:27,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:27,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:27,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:27,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-28 00:42:27,339 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:27,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:27,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1756718656, now seen corresponding path program 2 times [2024-06-28 00:42:27,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:27,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126086305] [2024-06-28 00:42:27,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:27,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:28,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:28,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126086305] [2024-06-28 00:42:28,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126086305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:28,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:28,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:42:28,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213987470] [2024-06-28 00:42:28,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:28,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:42:28,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:28,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:42:28,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:42:28,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:42:28,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 698 transitions, 11243 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) [2024-06-28 00:42:28,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:28,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:42:28,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:31,863 INFO L124 PetriNetUnfolderBase]: 4773/7675 cut-off events. [2024-06-28 00:42:31,863 INFO L125 PetriNetUnfolderBase]: For 1352327/1352327 co-relation queries the response was YES. [2024-06-28 00:42:31,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76647 conditions, 7675 events. 4773/7675 cut-off events. For 1352327/1352327 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 50873 event pairs, 917 based on Foata normal form. 2/7666 useless extension candidates. Maximal degree in co-relation 76414. Up to 7268 conditions per place. [2024-06-28 00:42:32,146 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 612 selfloop transitions, 112 changer transitions 0/729 dead transitions. [2024-06-28 00:42:32,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 729 transitions, 13085 flow [2024-06-28 00:42:32,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:42:32,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:42:32,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 00:42:32,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-28 00:42:32,147 INFO L175 Difference]: Start difference. First operand has 478 places, 698 transitions, 11243 flow. Second operand 8 states and 152 transitions. [2024-06-28 00:42:32,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 729 transitions, 13085 flow [2024-06-28 00:42:39,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 729 transitions, 12932 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-28 00:42:39,913 INFO L231 Difference]: Finished difference. Result has 483 places, 713 transitions, 11683 flow [2024-06-28 00:42:39,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11090, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11683, PETRI_PLACES=483, PETRI_TRANSITIONS=713} [2024-06-28 00:42:39,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-28 00:42:39,913 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 713 transitions, 11683 flow [2024-06-28 00:42:39,913 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) [2024-06-28 00:42:39,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:39,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:39,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-28 00:42:39,914 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:39,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:39,914 INFO L85 PathProgramCache]: Analyzing trace with hash -569597766, now seen corresponding path program 2 times [2024-06-28 00:42:39,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:39,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586450944] [2024-06-28 00:42:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:39,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:41,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:41,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586450944] [2024-06-28 00:42:41,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586450944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:41,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:41,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:42:41,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622170685] [2024-06-28 00:42:41,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:41,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:42:41,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:41,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:42:41,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:42:41,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:42:41,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 713 transitions, 11683 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:41,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:41,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:42:41,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:44,212 INFO L124 PetriNetUnfolderBase]: 4791/7705 cut-off events. [2024-06-28 00:42:44,212 INFO L125 PetriNetUnfolderBase]: For 1376022/1376022 co-relation queries the response was YES. [2024-06-28 00:42:44,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77722 conditions, 7705 events. 4791/7705 cut-off events. For 1376022/1376022 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 51170 event pairs, 1058 based on Foata normal form. 1/7703 useless extension candidates. Maximal degree in co-relation 77487. Up to 7403 conditions per place. [2024-06-28 00:42:44,337 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 678 selfloop transitions, 59 changer transitions 0/742 dead transitions. [2024-06-28 00:42:44,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 742 transitions, 13686 flow [2024-06-28 00:42:44,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:42:44,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:42:44,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-28 00:42:44,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-28 00:42:44,338 INFO L175 Difference]: Start difference. First operand has 483 places, 713 transitions, 11683 flow. Second operand 10 states and 185 transitions. [2024-06-28 00:42:44,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 742 transitions, 13686 flow [2024-06-28 00:42:53,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 742 transitions, 13328 flow, removed 103 selfloop flow, removed 4 redundant places. [2024-06-28 00:42:53,252 INFO L231 Difference]: Finished difference. Result has 490 places, 723 transitions, 11694 flow [2024-06-28 00:42:53,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11330, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11694, PETRI_PLACES=490, PETRI_TRANSITIONS=723} [2024-06-28 00:42:53,253 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-28 00:42:53,253 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 723 transitions, 11694 flow [2024-06-28 00:42:53,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:53,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:53,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:53,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-28 00:42:53,254 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:53,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:53,254 INFO L85 PathProgramCache]: Analyzing trace with hash -569360616, now seen corresponding path program 3 times [2024-06-28 00:42:53,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:53,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743071851] [2024-06-28 00:42:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:53,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:54,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:54,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743071851] [2024-06-28 00:42:54,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743071851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:54,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:54,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:42:54,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629667794] [2024-06-28 00:42:54,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:54,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:42:54,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:54,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:42:54,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:42:54,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:42:54,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 723 transitions, 11694 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:54,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:54,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:42:54,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:57,520 INFO L124 PetriNetUnfolderBase]: 4788/7701 cut-off events. [2024-06-28 00:42:57,520 INFO L125 PetriNetUnfolderBase]: For 1383568/1383568 co-relation queries the response was YES. [2024-06-28 00:42:57,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77547 conditions, 7701 events. 4788/7701 cut-off events. For 1383568/1383568 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 51194 event pairs, 1058 based on Foata normal form. 1/7699 useless extension candidates. Maximal degree in co-relation 77311. Up to 7416 conditions per place. [2024-06-28 00:42:57,665 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 688 selfloop transitions, 47 changer transitions 0/740 dead transitions. [2024-06-28 00:42:57,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 740 transitions, 13214 flow [2024-06-28 00:42:57,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:42:57,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:42:57,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 00:42:57,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-28 00:42:57,667 INFO L175 Difference]: Start difference. First operand has 490 places, 723 transitions, 11694 flow. Second operand 9 states and 168 transitions. [2024-06-28 00:42:57,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 740 transitions, 13214 flow [2024-06-28 00:43:07,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 740 transitions, 12968 flow, removed 68 selfloop flow, removed 8 redundant places. [2024-06-28 00:43:07,155 INFO L231 Difference]: Finished difference. Result has 491 places, 723 transitions, 11550 flow [2024-06-28 00:43:07,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11448, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11550, PETRI_PLACES=491, PETRI_TRANSITIONS=723} [2024-06-28 00:43:07,155 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-28 00:43:07,156 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 723 transitions, 11550 flow [2024-06-28 00:43:07,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:07,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:07,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:07,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-28 00:43:07,156 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:43:07,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:07,156 INFO L85 PathProgramCache]: Analyzing trace with hash -569597952, now seen corresponding path program 3 times [2024-06-28 00:43:07,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:07,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457176846] [2024-06-28 00:43:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:07,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:08,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:08,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457176846] [2024-06-28 00:43:08,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457176846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:08,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:08,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:43:08,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591316282] [2024-06-28 00:43:08,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:08,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:43:08,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:08,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:43:08,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:43:08,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:43:08,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 723 transitions, 11550 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) [2024-06-28 00:43:08,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:08,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:43:08,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:11,352 INFO L124 PetriNetUnfolderBase]: 4793/7709 cut-off events. [2024-06-28 00:43:11,353 INFO L125 PetriNetUnfolderBase]: For 1401433/1401433 co-relation queries the response was YES. [2024-06-28 00:43:11,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77622 conditions, 7709 events. 4793/7709 cut-off events. For 1401433/1401433 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 51214 event pairs, 1059 based on Foata normal form. 1/7704 useless extension candidates. Maximal degree in co-relation 77387. Up to 7437 conditions per place. [2024-06-28 00:43:11,489 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 695 selfloop transitions, 39 changer transitions 0/739 dead transitions. [2024-06-28 00:43:11,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 739 transitions, 13158 flow [2024-06-28 00:43:11,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:43:11,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:43:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-28 00:43:11,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-28 00:43:11,491 INFO L175 Difference]: Start difference. First operand has 491 places, 723 transitions, 11550 flow. Second operand 9 states and 152 transitions. [2024-06-28 00:43:11,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 739 transitions, 13158 flow [2024-06-28 00:43:20,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 739 transitions, 13058 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 00:43:20,702 INFO L231 Difference]: Finished difference. Result has 493 places, 726 transitions, 11643 flow [2024-06-28 00:43:20,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11450, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11643, PETRI_PLACES=493, PETRI_TRANSITIONS=726} [2024-06-28 00:43:20,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-28 00:43:20,703 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 726 transitions, 11643 flow [2024-06-28 00:43:20,703 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) [2024-06-28 00:43:20,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:20,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:20,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-28 00:43:20,704 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:43:20,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:20,704 INFO L85 PathProgramCache]: Analyzing trace with hash -287055600, now seen corresponding path program 1 times [2024-06-28 00:43:20,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:20,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638487252] [2024-06-28 00:43:20,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:20,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:22,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:22,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638487252] [2024-06-28 00:43:22,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638487252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:22,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:22,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:43:22,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672397619] [2024-06-28 00:43:22,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:22,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:43:22,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:22,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:43:22,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:43:22,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:43:22,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 726 transitions, 11643 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:22,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:22,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:43:22,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:25,842 INFO L124 PetriNetUnfolderBase]: 4801/7721 cut-off events. [2024-06-28 00:43:25,842 INFO L125 PetriNetUnfolderBase]: For 1429788/1429788 co-relation queries the response was YES. [2024-06-28 00:43:25,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77864 conditions, 7721 events. 4801/7721 cut-off events. For 1429788/1429788 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 51335 event pairs, 1057 based on Foata normal form. 2/7717 useless extension candidates. Maximal degree in co-relation 77627. Up to 7414 conditions per place. [2024-06-28 00:43:25,971 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 678 selfloop transitions, 62 changer transitions 0/745 dead transitions. [2024-06-28 00:43:25,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 745 transitions, 13223 flow [2024-06-28 00:43:25,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:43:25,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:43:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-28 00:43:25,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-28 00:43:25,973 INFO L175 Difference]: Start difference. First operand has 493 places, 726 transitions, 11643 flow. Second operand 10 states and 174 transitions. [2024-06-28 00:43:25,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 745 transitions, 13223 flow